Battleships

Kaiser Kirk · August 04, 2017, 09:52:45 PM

4x 1894 Coastal Battleship, scrapped HY1 1915

Kaiser Kirk · August 11, 2017, 11:24:37 PM

SCRAPPED

Class Name : Tortoise
Laid Down 1897, Refurbished 1921

BB-1 "Tortoise", Kasawag
BB-2 "Sea Turtle" , Zreh Kasawag

QuoteTortoise, Parthia Predreadnaught laid down 1897 (Engine 1921),

Displacement:
11,423 t light; 12,147 t standard; 13,090 t normal; 13,844 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(360.89 ft / 354.33 ft) x 85.30 ft x (24.61 / 25.78 ft)
(110.00 m / 108.00 m) x 26.00 m x (7.50 / 7.86 m)

Armament:
4 - 11.81" / 300 mm 41.5 cal guns - 870.83lbs / 395.00kg shells, 130 per gun
Breech loading guns in turret on barbette mounts, 1912 Model
2 x Twin mounts on centreline ends, evenly spread
12 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 145 per gun
Breech loading guns in casemate mounts, 1913 Model
10 x Single mounts on sides, forward evenly spread
4 hull mounts in casemates- Limited use in all but light seas
2 x Single mounts on sides, aft deck centre
2 hull mounts in casemates- Limited use in all but light seas
6 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 300 per gun
Anti-air guns in deck and hoist mounts, 1911 Model
2 x Single mounts on centreline ends, evenly spread
2 raised mounts
4 x Single mounts on side ends, evenly spread
4 raised mounts
16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
Machine guns in deck mounts, 1918 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 5,879 lbs / 2,667 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 212.60 ft / 64.80 m 9.84 ft / 3.00 m
Ends: 3.94" / 100 mm 141.70 ft / 43.19 m 9.84 ft / 3.00 m
Upper: 8.27" / 210 mm 212.60 ft / 64.80 m 8.20 ft / 2.50 m
Main Belt covers 92 % of normal length

- Hull void:
0.00" / 0 mm 0.00 ft / 0.00 m 0.00 ft / 0.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.8" / 325 mm 6.50" / 165 mm 12.6" / 320 mm
2nd: 8.27" / 210 mm 1.38" / 35 mm 1.38" / 35 mm
3rd: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm
4th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 4.13" / 105 mm
Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm

Armor decks :
15mm is laminated onto all 4 decks, providing +12mm armor.

Fore : 25+15, eff 37mm
Upper Citadel : 25+15, eff 37mm
Main Armor : 55 + 15, eff 67mm
(Total vs. Vert pen : 37/2 + 67 = 86mm)
Aft : 25+15, eff 37mm

- Conning towers: Forward 12.60" / 320 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 22,133 shp / 16,511 Kw = 20.00 kts
Range 6,048nm at 14.00 kts
Bunker at max displacement = 1,697 tons

Complement:
611 - 795

Cost:
£0.890 million / $3.561 million

Distribution of weights at normal displacement:
Armament: 862 tons, 6.6 %
- Guns: 862 tons, 6.6 %
Armour: 4,792 tons, 36.6 %
- Belts: 2,190 tons, 16.7 %
- Armament: 968 tons, 7.4 %
- Armour Deck: 1,483 tons, 11.3 %
- Conning Tower: 151 tons, 1.2 %
Machinery: 762 tons, 5.8 %
Hull, fittings & equipment: 4,022 tons, 30.7 %
Fuel, ammunition & stores: 1,667 tons, 12.7 %
Miscellaneous weights: 984 tons, 7.5 %
- Hull below water: 390 tons
- Hull void weights: 110 tons
- Hull above water: 237 tons
- On freeboard deck: 105 tons
- Above deck: 142 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25,941 lbs / 11,767 Kg = 31.5 x 11.8 " / 300 mm shells or 4.0 torpedoes
Stability (Unstable if below 1.00): 1.49
Metacentric height 7.8 ft / 2.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.616 / 0.622
Length to Beam Ratio: 4.15 : 1
'Natural speed' for length: 18.82 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 17.95 ft / 5.47 m, 16.31 ft / 4.97 m
- Forward deck: 20.00 %, 16.31 ft / 4.97 m, 14.67 ft / 4.47 m
- Aft deck: 40.00 %, 14.67 ft / 4.47 m, 14.67 ft / 4.47 m
- Quarter deck: 20.00 %, 14.67 ft / 4.47 m, 16.31 ft / 4.97 m
- Average freeboard: 15.45 ft / 4.71 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 53.3 %
- Above water (accommodation/working, high = better): 104.5 %
Waterplane Area: 22,438 Square feet or 2,085 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 148 lbs/sq ft or 725 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 3.17
- Overall: 1.10
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room

The Tortoise and Turtle were names for slow, armored terrapins.

The rebuild is intended to allow them to serve as Coast Defense or 'Escort' Armored cruisers.

The Byzantine 345mm ships are a concern, as these would fare very poorly, but in most other areas they could be successful.

If forced into offensive use, a nighttime battle is actually preferred, trying to close the range to where the old guns could be used to good effect.

The 300L41 was designed as a replacement for the 345L45 and 305L40, with design work completing in 1912, just in time for the expected 1913 refits.
However in 1913, the Expeditionary forces started siphoning the spare money up.

The 300L41.5 is only slightly better than the 305L40.
Commonality of guns, and the much improved turret designs of the later tech would be the reasons for the change

For the 345L35 though, the 300L41.5 is a great upgrade.
Penetration improves by 25% at range, as the much faster longer shell carries KE better.

The 180mm casements are retained, but the newer 180L43 in the +22% casements are fitted.
It is the hope of the planning section that for longer ranges coming into play, the 180mm can be used for spotting fire, creating 'ladders' and allowing the 300L41.5 to fire for effect.

Armor decks :
15mm is laminated onto all 4 decks, providing +12mm armor.

Fore : 25+15, eff 37mm
Upper Citadel : 25+15, eff 37mm
Main Armor : 55 + 15, eff 67mm
(Total vs. Vert pen : 37/2 + 67 = 86mm)
(Main belt + 320 +
Aft : 25+15, eff 37mm

Miscellaneous Weight :
87t : Fire Control 1918
25t : LR Radio
25t : Searchlight tower

25t : Hulesmeyer
25t : War Tuba
50t : 2x Kite Balloons
5t : Paravanes

12t : CO2 Air Compressor AC
25t : Enhanced Fire Ext.
200t : Marine Barracks

36t : Torpedo flat, stern under armor. 2x TT 21" each broadside, 12x 21" TT
191t : Turbogenerator
108t : Torpedo Nets
25t : Enhanced Pumps
30t : 2 Enhanced Hydrophone stations.

+4.47 Weather deck, Top of upper belt, upper 25mm armor deck
+1.97 Third Deck, Top of main belt, crown of protective deck 40mm
-0.53 Second Deck, edge of protective deck
-1.03 Bottom of Main Belt
-3.05 First Deck
-7.05 Engineering Deck

Tortoise, Parthia Predreadnaught laid down 1897

Displacement:
   11,399 t light; 12,125 t standard; 13,090 t normal; 13,861 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (360.89 ft / 354.33 ft) x 85.30 ft x (24.61 / 25.81 ft)
   (110.00 m / 108.00 m) x 26.00 m x (7.50 / 7.87 m)

Armament:
4 - 13.58" / 345 mm 35.0 cal guns - 1,168.45lbs / 530.00kg shells, 102 per gun
     Breech loading guns in turret on barbette mounts, 1889 Model
     2 x Twin mounts on centreline ends, evenly spread
12 - 7.09" / 180 mm 40.0 cal guns - 165.35lbs / 75.00kg shells, 164 per gun
     Breech loading guns in casemate mounts, 1889 Model
     10 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in all but light seas
     2 x Single mounts on sides, aft deck centre
      2 hull mounts in casemates- Limited use in all but light seas
16 - 2.36" / 60.0 mm 50.0 cal guns - 6.98lbs / 3.17kg shells, 300 per gun
     Quick firing guns in deck mounts, 1904 Model
     16 x Single mounts on sides, evenly spread
      8 raised mounts
Weight of broadside 6,770 lbs / 3,071 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   212.60 ft / 64.80 m   9.84 ft / 3.00 m
   Ends:   3.94" / 100 mm   141.70 ft / 43.19 m   9.84 ft / 3.00 m
   Upper:   8.27" / 210 mm   212.60 ft / 64.80 m   8.20 ft / 2.50 m
     Main Belt covers 92 % of normal length

Note, the 50mm protective deck slopes down behind the main belt

- Hull Bulges:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.8" / 325 mm   6.50" / 165 mm      12.6" / 320 mm
   2nd:   8.27" / 210 mm   0.98" / 25 mm      0.98" / 25 mm

- Protected deck - multiple decks: 2.95" / 75 mm For and Aft decks
   Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

The main protective deck is 50mm, the upper armor deck is 25mm

- Conning towers: Forward 12.60" / 320 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 11,458 ihp / 8,548 Kw = 17.00 kts
   Range 5,600nm at 10.00 kts
   Bunker at max displacement = 1,735 tons (100% coal)

Complement:
   611 - 795

Cost:
   £1.092 million / $4.367 million

Distribution of weights at normal displacement:
   Armament: 912 tons, 7.0 %
   Armour: 4,437 tons, 33.9 %
     - Belts: 2,184 tons, 16.7 %
     - Armament: 1,057 tons, 8.1 %
     - Armour Deck: 1,046 tons, 8.0 %
     - Conning Tower: 151 tons, 1.2 %
   Machinery: 1,878 tons, 14.4 %
   Hull, fittings & equipment: 3,848 tons, 29.4 %
   Fuel, ammunition & stores: 1,690 tons, 12.9 %
   Miscellaneous weights: 324 tons, 2.5 %
     - Hull below water: 138 tons
     - Hull void weights: 15 tons
     - On freeboard deck: 55 tons
     - Above deck: 116 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     17,701 lbs / 8,029 Kg = 14.1 x 13.6 " / 345 mm shells or 2.5 torpedoes
   Stability (Unstable if below 1.00): 1.54
   Metacentric height 8.2 ft / 2.5 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality (Average = 1.00): 1.55

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.616 / 0.622
   Length to Beam Ratio: 4.15 : 1
   'Natural speed' for length: 18.82 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 17.95 ft / 5.47 m, 16.31 ft / 4.97 m
     - Forward deck:   20.00 %, 16.31 ft / 4.97 m, 14.67 ft / 4.47 m
     - Aft deck:   40.00 %, 14.67 ft / 4.47 m, 14.67 ft / 4.47 m
     - Quarter deck:   20.00 %, 14.67 ft / 4.47 m, 16.31 ft / 4.97 m
     - Average freeboard:      15.45 ft / 4.71 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.4 %
      - Above water (accommodation/working, high = better): 104.5 %
   Waterplane Area: 22,438 Square feet or 2,085 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 142 lbs/sq ft or 695 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.91
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

+4.47 Weather deck, Top of upper belt, upper 25mm armor deck
+1.97 Third Deck, Top of main belt, crown of protective deck 50mm
-0.53 Second Deck, edge of protective deck
-1.03 Bottom of Main Belt
-3.05 First Deck
-7.05 Engineering Deck

Misc Wt.
25t- long range radio
91t- 1910 fire control
55t - 0.5% increased ventilation
30t - 5 torpedo tubes (1 bow, 2 each beam) with 20 16" torpedoes, 4/each
108t - torpedo nets
15t - (void) Construction reserve remaining

1904 Basic Refit : 50t
+25t Long Range Radio
- 16 x 45L40 , -13 const resv
+12 x 60L50 (25t)

1907 Basic Refit :
+1905 Fire Control : 91t
-91t const resv

1911 basic refit :
Improve FC to 1910 standard

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

Kaiser Kirk · August 12, 2017, 09:56:29 PM

Class Name : Rokh (Chariot) Class
Pathian Battleship laid down 1900
Refurbished 1923

BB-4 "War Chariot"
BB-5 "Scythed Chariot"

Quote
Rohk, Parthia battleship laid down 1900 (Engine 1923)

Displacement:
15,867 t light; 16,835 t standard; 17,902 t normal; 18,756 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(492.13 ft / 485.56 ft) x 76.28 ft (Bulges 82.84 ft) x (26.90 / 28.03 ft)
(150.00 m / 148.00 m) x 23.25 m (Bulges 25.25 m) x (8.20 / 8.54 m)

Armament:
4 - 11.81" / 300 mm 41.5 cal guns - 870.83lbs / 395.00kg shells, 104 per gun
Breech loading guns in turret on barbette mounts, 1912 Model
2 x Twin mounts on centreline ends, evenly spread
20 - 7.09" / 180 mm 47.0 cal guns - 198.42lbs / 90.00kg shells, 168 per gun
Breech loading guns in casemate mounts, 1921 Model
12 x Single mounts on sides, forward evenly spread
6 hull mounts in casemates- Limited use in heavy seas
8 x Single mounts on sides, aft evenly spread
4 hull mounts in casemates- Limited use in heavy seas
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 600 per gun
Anti-air guns in deck mounts, 1919 Model
8 x Single mounts on sides, evenly spread
8 x 2-gun mounts on sides, evenly spread
8 double raised mounts
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 3,000 per gun
Anti-air guns in deck mounts, 1918 Model
8 x Single mounts on sides, evenly spread
Weight of broadside 7,559 lbs / 3,429 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 315.03 ft / 96.02 m 8.20 ft / 2.50 m
Ends: 2.56" / 65 mm 170.51 ft / 51.97 m 8.20 ft / 2.50 m
Upper: 6.50" / 165 mm 242.78 ft / 74.00 m 16.40 ft / 5.00 m
Main Belt covers 100 % of normal length

- Hull Bulges:
0.51" / 13 mm 321.59 ft / 98.02 m 23.00 ft / 7.01 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.8" / 325 mm 5.91" / 150 mm 11.8" / 300 mm
2nd: 6.50" / 165 mm 1.38" / 35 mm 1.38" / 35 mm
3rd: 0.59" / 15 mm - -
4th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 5.91" / 150 mm
Forecastle: 1.77" / 45 mm Quarter deck: 2.95" / 75 mm

- Conning towers: Forward 12.60" / 320 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 45,817 shp / 34,180 Kw = 24.00 kts
Range 6,156nm at 14.00 kts
Bunker at max displacement = 1,921 tons

Complement:
773 - 1,005

Cost:
£1.233 million / $4.934 million

Distribution of weights at normal displacement:
Armament: 1,121 tons, 6.3 %
- Guns: 1,121 tons, 6.3 %
Armour: 6,584 tons, 36.8 %
- Belts: 2,751 tons, 15.4 %
- Bulges: 140 tons, 0.8 %
- Armament: 1,113 tons, 6.2 %
- Armour Deck: 2,394 tons, 13.4 %
- Conning Tower: 186 tons, 1.0 %
Machinery: 1,531 tons, 8.6 %
Hull, fittings & equipment: 5,645 tons, 31.5 %
Fuel, ammunition & stores: 2,035 tons, 11.4 %
Miscellaneous weights: 986 tons, 5.5 %
- Hull below water: 596 tons
- Bulge void weights: 150 tons
- Hull above water: 42 tons
- On freeboard deck: 5 tons
- Above deck: 193 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
33,370 lbs / 15,136 Kg = 40.5 x 11.8 " / 300 mm shells or 4.0 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 6.0 ft / 1.8 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has low forecastle, low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.579 / 0.582
Length to Beam Ratio: 5.86 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 11.29 ft / 3.44 m, 11.29 ft / 3.44 m
- Forward deck: 25.00 %, 19.49 ft / 5.94 m, 19.49 ft / 5.94 m
- Aft deck: 25.00 %, 19.49 ft / 5.94 m, 19.49 ft / 5.94 m
- Quarter deck: 25.00 %, 11.29 ft / 3.44 m, 11.29 ft / 3.44 m
- Average freeboard: 15.39 ft / 4.69 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.8 %
- Above water (accommodation/working, high = better): 127.6 %
Waterplane Area: 26,562 Square feet or 2,468 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 160 lbs/sq ft or 781 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.08
- Longitudinal: 2.08
- Overall: 1.15
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Armor : Laminate armor onto existing decks (80% eff)
Forward deck : +20mm (+16mm)
Upper AD : +20mm (+16mm)
Main AD : +50mm (+40mm)
Stern Deck : +50mm (+40mm)

Total Vertical : (55+40)+(25+16)/2= 115.5
Waterline Citadel : 320 + ((55+40)*1.5)/2) = 391.25

Misc Wt
Reserve :150

AD:
113t : Fire Control
30t : Searchlights (NF)
25t : Hulesmeyer
25t : LR Radio

OD:
5t : Paravanes

HAW:
17t : CO2 Air Compressor AC
25t : Extra Fire Extinguishers

HBW:
10t : Batteries
30t : 2 Enhanced Hydrophone Stations
25t : Additional Pumps
148t : Torpedo Nets
383t : Turboelectric Generator

Displacement:
14,493 t light; 15,417 t standard; 16,484 t normal; 17,338 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(492.13 ft / 485.56 ft) x 76.28 ft x (26.90 / 28.03 ft)
(150.00 m / 148.00 m) x 23.25 m x (8.20 / 8.54 m)

Armament:
4 - 12.01" / 305 mm 40.0 cal guns - 826.73lbs / 375.00kg shells, 110 per gun
Breech loading guns in turret on barbette mounts, 1899 Model
2 x Twin mounts on centreline ends, evenly spread
20 - 7.09" / 180 mm 45.0 cal guns - 176.37lbs / 80.00kg shells, 190 per gun
Breech loading guns in casemate mounts, 1899 Model
12 x Single mounts on sides, forward evenly spread
6 hull mounts in casemates- Limited use in heavy seas
8 x Single mounts on sides, aft deck centre
4 hull mounts in casemates- Limited use in heavy seas
16 - 2.36" / 60.0 mm 50.0 cal guns - 7.28lbs / 3.30kg shells, 300 per gun
Quick firing guns in deck mounts, 1904 Model
16 x Single mounts on sides amidships
8 raised mounts
Weight of broadside 6,951 lbs / 3,153 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 315.03 ft / 96.02 m 8.20 ft / 2.50 m
Ends: 2.56" / 65 mm 170.51 ft / 51.97 m 8.20 ft / 2.50 m
Upper: 6.50" / 165 mm 242.78 ft / 74.00 m 16.40 ft / 5.00 m
Main Belt covers 100 % of normal length

- Hull Bulges:
0.00" / 0 mm 0.00 ft / 0.00 m 0.00 ft / 0.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.8" / 325 mm 5.91" / 150 mm 11.8" / 300 mm
2nd: 6.50" / 165 mm 0.98" / 25 mm 0.98" / 25 mm

- Protected deck - multiple decks: 3.15" / 80 mm For and Aft decks
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 12.60" / 320 mm, Aft 0.00" / 0 mm

Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 4 shafts, 20,987 ihp / 15,656 Kw = 20.00 kts
Range 5,815nm at 10.00 kts
Bunker at max displacement = 1,921 tons (90% coal)

Complement:
726 - 945

Cost:
£1.412 million / $5.650 million

Distribution of weights at normal displacement:
Armament: 1,076 tons, 6.5 %
Armour: 5,243 tons, 31.8 %
- Belts: 2,758 tons, 16.7 %
- Armament: 1,085 tons, 6.6 %
- Armour Deck: 1,224 tons, 7.4 %
- Conning Tower: 176 tons, 1.1 %
Machinery: 3,247 tons, 19.7 %
Hull, fittings & equipment: 4,502 tons, 27.3 %
Fuel, ammunition & stores: 1,991 tons, 12.1 %
Miscellaneous weights: 425 tons, 2.6 %
- Hull below water: 189 tons
- Hull void weights: 25 tons
- On freeboard deck: 73 tons
- Above deck: 138 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,631 lbs / 8,904 Kg = 22.7 x 12.0 " / 305 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 5.7 ft / 1.7 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0.52
Seaboat quality (Average = 1.00): 1.55

Hull form characteristics:
Hull has low forecastle, low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.579 / 0.585
Length to Beam Ratio: 6.37 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 11.29 ft / 3.44 m, 11.29 ft / 3.44 m
- Forward deck: 25.00 %, 19.49 ft / 5.94 m, 19.49 ft / 5.94 m
- Aft deck: 25.00 %, 19.49 ft / 5.94 m, 19.49 ft / 5.94 m
- Quarter deck: 25.00 %, 11.29 ft / 3.44 m, 11.29 ft / 3.44 m
- Average freeboard: 15.39 ft / 4.69 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.2 %
- Above water (accommodation/working, high = better): 135.8 %
Waterplane Area: 26,562 Square feet or 2,468 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 133 lbs/sq ft or 648 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.76
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

This is a expanded version of the OTL Hapsburg class, with 5 double-stacked casements instead of 3. The midships is raised, as is the upper belt, to provide room for those casements.

The vessel fields the new 305mm "high velocity" rifle, firing a 375kg round at 821m/s. Tests indicate up to 380mm of armor would be needed to fully stop this, an increase of 22% over the larger 1889 345mm. However, as Semi-armor peircing rounds have a limit of roughly 2/3rds their caliber for pentration, only 240mm would be needed to achieve that goal.

Due to the high central casement, and the high speed, the main belt armor is barely adequate. It will stop Semi-Armor piercing shells of all known calibers, but relies on the deflection ability of the sloped protective deck to keep solid shot from penetrating the vitals. The curve of the main battery barbettes is believed adequate to mimic the belt armor, as is the turret face armor.

Range is equivalent of 21 days at 10kts with a 10% reserve

Misc Wt.
25t- Long Range Radios, as built
105t - 1910 Fire Control
73t - 0.5% increased ventilation
40t - 4 torpedo tubes (2 each beam) with 20 18" torpedoes
148t - Torpedo Nets
25t - Construction reserve

+5.94 Double Stacked Casement Citadel, Upper Armored Deck 25mm
+3.44 Weather Deck
+0.94 3rd Deck, Top Main belt, Crown Protective Deck 55mm
-1.56 2nd Deck Bottom Main Belt, Edge Protective Deck
-4.06 1st Deck
-8.06 Engineering Deck

1907 refit : 138t
105t : +1905 fire control
-105t : construction reserve
-16x 45L45
25t +16x 60L50
-15t construction reserve.

1912 Basic Refit :
105t 1910 Fire Control

Edit : 5/6/18 Major edit to correct main gun caliber.

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

1922 Fleet refits :
Basic Refit Misc Weight
1922 FC refits
- 16x 60L50
+4 x 90L50AA, +2x 57L60

108t - 1918 FC
25t – LR Radio
+25t - Searchlights Columns(NF)
+5t Paravanes

Kaiser Kirk · August 12, 2017, 11:13:51 PM

Class Name : Simurgh
Parthian Battleship laid down 1904
Refurbished 1924

BB-5 "Simurgh"
BB-6 "Huma"

Quote
Simurgh, Parthian Battleship laid down 1904 (Engine 1924)

Displacement:
18,477 t light; 19,579 t standard; 20,924 t normal; 22,001 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(493.77 ft / 487.20 ft) x 86.94 ft (Bulges 93.50 ft) x (28.71 / 29.97 ft)
(150.50 m / 148.50 m) x 26.50 m (Bulges 28.50 m) x (8.75 / 9.13 m)

Armament:
4 - 13.11" / 333 mm 43.0 cal guns - 1,311.75lbs / 595.00kg shells, 96 per gun
Breech loading guns in turret on barbette mounts, 1917 Model
2 x Twin mounts on centreline ends, evenly spread
16 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 197 per gun
Breech loading guns in turret on barbette mounts, 1913 Model
2 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 x Twin mounts on sides, evenly spread
2 raised mounts
8 - 3.54" / 90.0 mm 50.0 cal guns - 23.55lbs / 10.68kg shells, 600 per gun
Anti-air guns in deck and hoist mounts, 1911 Model
4 x 2-gun mounts on side ends, evenly spread
4 double raised mounts
4 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 600 per gun
Anti-air guns in deck and hoist mounts, 1919 Model
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.12lbs / 0.05kg shells, 3,000 per gun
Machine guns in deck mounts, 1917 Model
8 x Single mounts on sides, evenly spread
Weight of broadside 8,462 lbs / 3,838 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 316.67 ft / 96.52 m 9.84 ft / 3.00 m
Ends: 1.38" / 35 mm 170.51 ft / 51.97 m 8.20 ft / 2.50 m
Upper: 5.31" / 135 mm 316.67 ft / 96.52 m 10.99 ft / 3.35 m
Main Belt covers 100 % of normal length

- Hull Bulges:
0.35" / 9 mm 323.23 ft / 98.52 m 24.44 ft / 7.45 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.4" / 365 mm 6.50" / 165 mm 13.6" / 345 mm
2nd: 5.91" / 150 mm 1.97" / 50 mm 5.31" / 135 mm
3rd: 1.38" / 35 mm 0.98" / 25 mm 0.98" / 25 mm
4th: 0.98" / 25 mm - -

- Protected deck - multiple decks:
For and Aft decks: 6.10" / 155 mm
Forecastle: 1.57" / 40 mm Quarter deck: 3.15" / 80 mm

Protective
Deck Armor + Laminations :
25+10mm fore
25+10mm upper
55+50mm main
25+50mm stern

Vert :(30+10 * .8 )/2 + (60+50 * .8 ) = 128
Waterline : 360+ (((55+50* .8 ) * 1.5 )/ 2 ) =431.25mm

- Conning towers: Forward 14.17" / 360 mm, Aft 2.95" / 75 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 50,873 shp / 37,951 Kw = 24.00 kts
Range 7,200nm at 14.00 kts
Bunker at max displacement = 2,422 tons

Complement:
869 - 1,130

Cost:
£1.548 million / $6.193 million

Distribution of weights at normal displacement:
Armament: 1,399 tons, 6.7 %
- Guns: 1,399 tons, 6.7 %
Armour: 7,880 tons, 37.7 %
- Belts: 2,847 tons, 13.6 %
- Bulges: 104 tons, 0.5 %
- Armament: 1,637 tons, 7.8 %
- Armour Deck: 3,013 tons, 14.4 %
- Conning Towers: 280 tons, 1.3 %
Machinery: 1,676 tons, 8.0 %
Hull, fittings & equipment: 6,410 tons, 30.6 %
Fuel, ammunition & stores: 2,447 tons, 11.7 %
Miscellaneous weights: 1,112 tons, 5.3 %
- Hull below water: 593 tons
- Bulge void weights: 200 tons
- Hull above water: 44 tons
- On freeboard deck: 50 tons
- Above deck: 225 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
32,543 lbs / 14,761 Kg = 28.9 x 13.1 " / 333 mm shells or 4.2 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 6.2 ft / 1.9 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.560 / 0.564
Length to Beam Ratio: 5.21 : 1
'Natural speed' for length: 22.07 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 24.28 ft / 7.40 m, 21.98 ft / 6.70 m
- Forward deck: 35.00 %, 21.98 ft / 6.70 m, 19.69 ft / 6.00 m
- Aft deck: 30.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 15.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Average freeboard: 17.04 ft / 5.19 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.2 %
- Above water (accommodation/working, high = better): 108.0 %
Waterplane Area: 29,840 Square feet or 2,772 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 164 lbs/sq ft or 801 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.13
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room

Misc Weight :

Reserve : 200

AD
140t Fire Control
25t LR Radio
10t SR Radio dedicated aircraft
25t Hulesmeyer
25t Searchlight Tower (NF)

OD
5t Paravanes
5t Gunpowder Cat tranverse mounting
40t 2x Scout Floatplane

HAW
25t Enhanced Fire Suppression
19t CO2 compressor AC

HBW
25t Enhanced Pumps
149t Torpedo Nets
419t Turboelectric Generator

Deck Armor Laminations :
+10mm fore
+10mm upper
+50mm main, stern

Vert :(30+10*.8 )/2 + (60+50*.8 ) = 128
Waterline : 360+ (60+50*.8 ) =460mm

Upper belt : The main belt rises 0.5m above the main protective deck. The remaining distance to freeboard is covered by the upperbelt. 54% of the upper belt is 2 decks (5m) high, and 46% is 1 deck (2.5m) high. This means 54% is 4.5m high, and 46% is 2m high, for an average of 3.35m high.

Class Name : Simurgh
Parthian Battleship laid down 1904
Displacement:
   17,000 t light; 18,034 t standard; 19,456 t normal; 20,594 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (493.77 ft / 487.20 ft) x 86.94 ft x (28.71 / 30.04 ft)
   (150.50 m / 148.50 m) x 26.50 m x (8.75 / 9.16 m)

Armament:
4 - 13.58" / 345 mm 40.0 cal guns - 1,201.52lbs / 545.00kg shells, 105 per gun
     Breech loading guns in turret on barbette mounts, 1904 Model
     2 x Twin mounts on centreline ends, evenly spread
16 - 7.09" / 180 mm 45.0 cal guns - 176.37lbs / 80.00kg shells, 200 per gun
     Breech loading guns in turret on barbette mounts, 1904 Model
     2 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     6 x Twin mounts on sides amidships
      2 raised mounts
14 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1904 Model
     14 x Single mounts on sides, evenly spread
      14 hull mounts in casemates- Limited use in heavy seas
Weight of broadside 7,937 lbs / 3,600 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.2" / 360 mm   316.67 ft / 96.52 m   9.84 ft / 3.00 m
   Ends:   3.94" / 100 mm   170.51 ft / 51.97 m   8.20 ft / 2.50 m
   Upper:   5.31" / 135 mm   316.67 ft / 96.52 m   10.99 ft / 3.35 m
     Main Belt covers 100 % of normal length

Belt is backed by 60mm protectived deck

- Hull Bulges:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.4" / 365 mm   6.50" / 165 mm      13.6" / 345 mm
   2nd:   5.91" / 150 mm   1.97" / 50 mm      5.31" / 135 mm
   3rd:   5.31" / 135 mm     -           -

- Protected deck - multiple decks: 3.74" / 95 mm For and Aft decks
   Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 14.17" / 360 mm, , Aft 2.95" / 75 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 23,354 shp / 17,422 Kw = 20.00 kts
   Range 5,825nm at 10.00 kts
   Bunker at max displacement = 2,560 tons (90% coal)

Complement:
   823 - 1,070

Cost:
   £1.602 million / $6.409 million

Distribution of weights at normal displacement:
   Armament: 1,437 tons, 7.4 %
   Armour: 6,784 tons, 34.9 %
     - Belts: 2,980 tons, 15.3 %
     - Armament: 1,767 tons, 9.1 %
     - Armour Deck: 1,817 tons, 9.3 %
     - Conning Tower: 221 tons, 1.1 %
   Machinery: 2,312 tons, 11.9 %
   Hull, fittings & equipment: 5,997 tons, 30.8 %
   Fuel, ammunition & stores: 2,456 tons, 12.6 %
   Miscellaneous weights: 469 tons, 2.4 %
     - Hull below water: 189 tons
     - Hull void weights: 26 tons
     - On freeboard deck: 85 tons
     - Above deck: 169 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25,110 lbs / 11,390 Kg = 20.0 x 13.6 " / 345 mm shells or 3.1 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 15.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.560 / 0.566
   Length to Beam Ratio: 5.60 : 1
   'Natural speed' for length: 22.07 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 24.28 ft / 7.40 m, 21.98 ft / 6.70 m
     - Forward deck:   35.00 %, 21.98 ft / 6.70 m, 19.69 ft / 6.00 m
     - Aft deck:   30.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Quarter deck:   15.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Average freeboard:      17.04 ft / 5.19 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.1 %
      - Above water (accommodation/working, high = better): 114.1 %
   Waterplane Area: 29,840 Square feet or 2,772 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 158 lbs/sq ft or 771 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 2.04
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Upper belt : The main belt rises 0.5m above the main protective deck. The remaining distance to freeboard is covered by the upperbelt. 54% of the upper belt is 2 decks (5m) high, and 46% is 1 deck (2.5m) high. This means 54% is 4.5m high, and 46% is 2m high, for an average of 3.35m high.

+6.0 Forecastle Deck, 30mm armor deck, top of 54% of upper belt.
+3.5 Weather Deck, 30mm armor deck, top of 46% of upper belt
+1.5 Top of main belt
+1.0 3rd Deck, Crown of Protective Deck 60mm
-1.5 3rd Deck, Bottom of main belt, lower edge of 60mm protective deck
-3.00 2nd Deck
-5.50 1st Deck, pierced by turbines
-8.08 Engineering Deck

Range is equivalent of 21 days at 10kts with a 10% reserve

Misc Wt.

85t - 0.5% "Windcatcher" increased ventilation
40t - 4 torpedo tubes (2 each beam) with 20x 18" torpedoes
149t - Torpedo Nets
144t - 1910 Fire Control
26t - void, construction reserve (1%)

1907 Refit :
-144t Constrution Reserve
144t 1905 Fire Control

1912 Basic Refit :
144t 1910 Fire Control

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

1922 fleet refit
Basic Refit Misc Weight

+ 6 x 15mm 'Wirblewind' AA mounts. = 5.1 t

Miscellaneous Weight 1922 Basic Refit
AD
144t Fire Control 1918
25t LR Radio
+5t - basic NF

OD
+5t - Paravanes

Kaiser Kirk · August 12, 2017, 11:28:46 PM

Class Name : Gilgamesh
Parthian Gilgamesh laid down 1906, Refurbished 1925-27

BB-7 "Gilgamesh"
BB-8 "Enkidu"
BB-9 "Humbaba"
BB-10 "Gugalanna"

from the Epic of Gilgamesh

Quote

Gilgamesh Recon1925, Parthian Dreadnaught laid down 1906 (Engine 1925)

Displacement:
22,956 t light; 24,570 t standard; 26,083 t normal; 27,293 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(538.06 ft / 531.50 ft) x 88.58 ft (Bulges 98.43 ft) x (29.53 / 30.77 ft)
(164.00 m / 162.00 m) x 27.00 m (Bulges 30.00 m) x (9.00 / 9.38 m)

Armament:
10 - 13.11" / 333 mm 43.0 cal guns - 1,333.80lbs / 605.00kg shells, 99 per gun
Breech loading guns in turret on barbette mounts, 1917 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
1 x Twin mount on centreline, forward deck aft
16 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 250 per gun
Quick firing guns in turret on barbette mounts, 1913 Model
8 x 2-gun mounts on sides, evenly spread
16 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 600 per gun
Anti-air guns in deck mounts, 1917 Model
6 x 2-gun mounts on side ends, majority forward
6 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
Machine guns in deck mounts, 1917 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 15,738 lbs / 7,139 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.5" / 420 mm 345.47 ft / 105.30 m 9.84 ft / 3.00 m
Ends: 1.38" / 35 mm 185.99 ft / 56.69 m 9.84 ft / 3.00 m
Upper: 2.95" / 75 mm 312.66 ft / 95.30 m 11.98 ft / 3.65 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.81" / 46 mm 345.47 ft / 105.30 m 28.08 ft / 8.56 m
Beam between torpedo bulkheads 52.49 ft / 16.00 m

- Hull Bulges:
0.35" / 9 mm 345.47 ft / 105.30 m 24.61 ft / 7.50 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.5" / 420 mm 7.09" / 180 mm 15.0" / 380 mm
2nd: 1.38" / 35 mm 1.38" / 35 mm 1.38" / 35 mm
4th: 0.31" / 8 mm - -
5th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 5.31" / 135 mm
Forecastle: 1.18" / 30 mm Quarter deck: 2.76" / 70 mm

Protective Deck Armor + Laminated armor
Fore : 30mm
Upper : 30mm
Main : 65mm+40mm
Quarter : 30mm+40mm

Laminate +40mm to main and quarter -- /65/30mm deck

Effective main belt + PD : 420 + (((65+40*.8 )*1.5)/2) = 492.75mm

Effective vertical : 65+(40*.8 )+(30/2) = 112mm

- Conning towers: Forward 16.54" / 420 mm, Aft 2.95" / 75 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 27,734 shp / 20,690 Kw = 20.00 kts
Range 7,100nm at 14.00 kts
Bunker at max displacement = 2,723 tons

Complement:
1,026 - 1,334

Cost:
£2.111 million / $8.445 million

Distribution of weights at normal displacement:
Armament: 2,433 tons, 9.3 %
- Guns: 2,433 tons, 9.3 %
Armour: 10,261 tons, 39.3 %
- Belts: 3,065 tons, 11.8 %
- Torpedo bulkhead: 650 tons, 2.5 %
- Bulges: 111 tons, 0.4 %
- Armament: 3,073 tons, 11.8 %
- Armour Deck: 2,992 tons, 11.5 %
- Conning Towers: 369 tons, 1.4 %
Machinery: 900 tons, 3.5 %
Hull, fittings & equipment: 8,447 tons, 32.4 %
Fuel, ammunition & stores: 3,127 tons, 12.0 %
Miscellaneous weights: 913 tons, 3.5 %
- Hull below water: 412 tons
- Bulge void weights: 75 tons
- Hull above water: 48 tons
- On freeboard deck: 60 tons
- Above deck: 318 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38,831 lbs / 17,614 Kg = 34.5 x 13.1 " / 333 mm shells or 8.1 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 5.3 ft / 1.6 m
Roll period: 18.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.64
Seaboat quality (Average = 1.00): 1.34

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.591 / 0.593
Length to Beam Ratio: 5.40 : 1
'Natural speed' for length: 23.05 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 25.43 ft / 7.75 m, 22.97 ft / 7.00 m
- Forward deck: 25.00 %, 22.97 ft / 7.00 m, 21.00 ft / 6.40 m
- Aft deck: 40.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 15.00 %, 11.48 ft / 3.50 m, 13.12 ft / 4.00 m
- Average freeboard: 16.72 ft / 5.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.8 %
- Above water (accommodation/working, high = better): 98.4 %
Waterplane Area: 34,146 Square feet or 3,172 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 194 lbs/sq ft or 946 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.63
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

The casements and upperbelt were replaced,but with an single 75mm upper belt.
This allows the end belts to be retained, albeit thinner.
The main belt rises 0.5m over the crown of the protective deck, above which the upper belt carries to the upper deck.

The Electric drive means unit layout, and short propeller shafts, better maneuverability plus fuel savings,
giving a 8,165nm range

The TDS is 5.5m deep + 1.5m bulge on each side.
Conceptually that means :
The 2x19mm holding bulkhead can be 4.0m inside the hull, and 5.5m from the outer bulge,
plenty of room for liquid/void compartments with mild steel separators.
and then a 1.5m wide passage with an 8mm unpierced flooding bulkhead will both control
leaks/displacement, and provide damage control access behind the TDS.

Reserve : 75t

Misc Wt :
AD
243 FC 1918
25 LR radio
25 Hulesmeyer
25 Searchlight Tower (NF)

OD
5 Paravanes
40 2x Scoutfloatplanes
5 Gunpowder Cat
10 Hanger

HAW
23 CO2 Compressor AC
25 Additional pumps

HBW
162 Torpedo Nets
25t Additional Pumps

+ 6.0 forecastle, Top of upperbelt for 66%, 30mm protective deck
+3.5 weather, Top of upper belt for 33%
+1.5 Top of Main Belt
+1.0 3rd , Crown of 65mm protective deck
-1.5 2nd , bottom of belt, edge of protective deck, top of bulge
-4.0 1st
-8.56 Engineering Deck

Class Name : Gilgamesh
Parthian Gilgamesh laid down 1906,
Displacement:
   22,990 t light; 24,570 t standard; 26,083 t normal; 27,293 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (538.06 ft / 531.50 ft) x 88.58 ft (Bulges 98.43 ft) x (29.53 / 30.77 ft)
   (164.00 m / 162.00 m) x 27.00 m (Bulges 30.00 m) x (9.00 / 9.38 m)

Armament:
10 - 13.58" / 345 mm 40.0 cal guns - 1,201.52lbs / 545.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1904 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     1 x Twin mount on centreline, forward deck aft
8 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1899 Model
     8 x Single mounts on sides forward
      4 raised mounts - superfiring
12 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1899 Model
     12 x Single mounts on sides amidships
      12 hull mounts in casemates- Limited use in heavy seas
12 - 2.36" / 60.0 mm 50.0 cal guns - 6.61lbs / 3.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1904 Model
     12 x Single mounts on sides forward
      12 double raised mounts
Weight of broadside 14,872 lbs / 6,746 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   16.5" / 420 mm   345.47 ft / 105.30 m   9.84 ft / 3.00 m
   Ends:   3.94" / 100 mm   185.99 ft / 56.69 m   9.84 ft / 3.00 m
   Upper:   5.31" / 135 mm   312.66 ft / 95.30 m   11.98 ft / 3.65 m
     Main Belt covers 100 % of normal length

Main belt is backed by 65mm slope of protective deck

- Hull Bulges:
      0.47" / 12 mm   345.47 ft / 105.30 m   24.61 ft / 7.50 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   16.5" / 420 mm   7.09" / 180 mm      15.0" / 380 mm
   2nd:   5.31" / 135 mm   2.56" / 65 mm      5.31" / 135 mm
   3rd:   5.31" / 135 mm   0.98" / 25 mm      0.98" / 25 mm

- Protected deck - multiple decks: 3.74" / 95 mm For and Aft decks
   Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 16.54" / 420 mm, Aft 2.95" / 75 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 27,734 shp / 20,690 Kw = 20.00 kts
   Range 5,770nm at 10.00 kts
   Bunker at max displacement = 2,723 tons (90% coal)

Complement:
   1,026 - 1,334

Cost:
   £2.262 million / $9.049 million

Distribution of weights at normal displacement:
   Armament: 2,421 tons, 9.3 %
   Armour: 9,484 tons, 36.4 %
     - Belts: 3,637 tons, 13.9 %
     - Bulges: 149 tons, 0.6 %
     - Armament: 3,306 tons, 12.7 %
     - Armour Deck: 2,078 tons, 8.0 %
     - Conning Tower: 313 tons, 1.2 %
   Machinery: 1,961 tons, 7.5 %
   Hull, fittings & equipment: 8,522 tons, 32.7 %
   Fuel, ammunition & stores: 3,093 tons, 11.9 %
   Miscellaneous weights: 602 tons, 2.3 %
     - Hull below water: 202 tons
     - Bulge void weights: 250 tons
     - On freeboard deck: 115 tons
     - Above deck: 35 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     34,304 lbs / 15,560 Kg = 27.4 x 13.6 " / 345 mm shells or 4.0 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 5.4 ft / 1.7 m
   Roll period: 17.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.69
   Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.591 / 0.593
   Length to Beam Ratio: 5.40 : 1
   'Natural speed' for length: 23.05 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 25.39 ft / 7.74 m, 22.54 ft / 6.87 m
     - Forward deck:   43.00 %, 22.54 ft / 6.87 m, 19.69 ft / 6.00 m
     - Aft deck:   22.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Quarter deck:   15.00 %, 11.48 ft / 3.50 m, 13.12 ft / 4.00 m
     - Average freeboard:      18.19 ft / 5.54 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 68.0 %
      - Above water (accommodation/working, high = better): 113.2 %
   Waterplane Area: 34,146 Square feet or 3,172 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 192 lbs/sq ft or 939 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.87
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Gilgamesh class was designed to take advantage of the new 1904 guns, 1904 turbines, but more importantly represents a philosophical change from the preceeding battleships. With rapid advances in fire control being evident, and ranges of 6km already being reliably achieved in practice, with promise of greater ranges as techniques improve, the arguments of the "all big gun" club bore more weight. The Gilgamesh was designed in response to that change, but, as the true future ranges is yet unknown, bears immensely thick armor suited to the old point blank ranges. The addition of fire control during construction was foreseen at the time of laying the keel, but absorbed the majority of the typical construction reserve.

Misc. Weight :
162t - torpedo nets
40t - 4x UTT, 2 each beam, 20 x 18" Torpedoes
115t - Extra ventilation "Windcather" evaportive cooling
35t- Short & Long range Radios
242t - 1910 Fire Control
8t- Construction reserve

1911 HY2 :
Basic Refit, upgrade to 1910 Fire Control

+ 6.0 forecastle, Top of upperbelt for 66%, 30mm protective deck
+3.5 weather, Top of upper belt for 33%
+1.5 Top of Main Belt
+1.0 3rd , Crown of 65mm protective deck
-1.5 2nd , bottom of belt, edge of protective deck, top of bulge
-4.0 1st
-8.56 Engineering Deck

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

1922 Fleet Basic Refits -
Basic Refit Misc Weight

Remove 12x 60L50 QF M
Add 6x 2G 57L60AA M - 34t total

243t – 1918 FC
-10t - Free SR Radio
25t - New LR Radio
+5– Basic Night fighting gear
+5 Paravanes

Kaiser Kirk · August 13, 2017, 11:41:28 AM

Class Name : Enki
Parthian Gilgamesh laid down 1907, refitted 1922, Refurbished 1928.5 - 1929.0

BB-11 Enki
BB-12 Ninurta

# Built : 2
# Active : 2
# Lost : 0

Quote
Enki -1929 Refurbishment, Parthian Dreadnaught laid down 1907 (Engine 1928)

Displacement:
   22,075 t light; 23,550 t standard; 24,648 t normal; 25,527 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (548.20 ft / 541.34 ft) x 88.58 ft (Bulges 98.43 ft) x (28.71 / 29.61 ft)
   (167.09 m / 165.00 m) x 27.00 m (Bulges 30.00 m) x (8.75 / 9.03 m)

Armament:
10 - 13.11" / 333 mm 43.0 cal guns - 1,333.80lbs / 605.00kg shells, 99 per gun
     Breech loading guns in turret on barbette mounts, 1925 Model
     5 x Twin mounts on centreline, evenly spread
      2 raised mounts
16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1925 Model
     8 x 2-gun mounts on side ends, evenly spread
      4 raised mounts - superfiring
16 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 400 per gun
     Anti-air guns in deck and hoist mounts, 1925 Model
     6 x 2-gun mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1925 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 14,857 lbs / 6,739 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.0" / 355 mm   351.87 ft / 107.25 m   9.84 ft / 3.00 m
   Ends:   1.57" / 40 mm   189.44 ft / 57.74 m   9.84 ft / 3.00 m
   Upper:   5.31" / 135 mm   319.06 ft / 97.25 m   6.56 ft / 2.00 m
     Main Belt covers 100 % of normal length

Laminate additional deck armor (effective thickness)
+30mm : quarterdeck (49mm)
+30mm : main citadel deck (89mm)

Vertical protection :
Total : 135mm
Effective : 30/2 + (65 +(30*0.8)) = 104mm

Waterline Horizontal : 355+ ((65+(30*.8)* 1.5 )/2 )
= 421.75mm

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.50" / 38 mm   351.87 ft / 107.25 m   26.57 ft / 8.10 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

- Hull Bulges:
      0.35" / 9 mm   351.87 ft / 107.25 m   24.61 ft / 7.50 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   7.09" / 180 mm      14.0" / 355 mm
   2nd:   2.95" / 75 mm   1.57" / 40 mm      1.97" / 50 mm
   3rd:   0.59" / 15 mm   0.31" / 8 mm      0.31" / 8 mm
   4th:   0.59" / 15 mm     -           -

- Protected deck - multiple decks:
   For and Aft decks: 5.31" / 135 mm
   Forecastle: 0.98" / 25 mm Quarter deck: 2.17" / 55 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 26,398 shp / 19,693 Kw = 20.00 kts
   Range 5,365nm at 14.00 kts
   Bunker at max displacement = 1,977 tons

Complement:
   983 - 1,278

Cost:
   £2.034 million / $8.138 million

Distribution of weights at normal displacement:
   Armament: 2,292 tons, 9.3 %
     - Guns: 2,292 tons, 9.3 %
   Armour: 9,186 tons, 37.3 %
     - Belts: 2,724 tons, 11.1 %
     - Torpedo bulkhead: 518 tons, 2.1 %
     - Bulges: 114 tons, 0.5 %
     - Armament: 2,623 tons, 10.6 %
     - Armour Deck: 2,924 tons, 11.9 %
     - Conning Towers: 284 tons, 1.2 %
   Machinery: 822 tons, 3.3 %
   Hull, fittings & equipment: 8,955 tons, 36.3 %
   Fuel, ammunition & stores: 2,573 tons, 10.4 %
   Miscellaneous weights: 819 tons, 3.3 %
     - Hull below water: 215 tons
     - Bulge void weights: 140 tons
     - Hull above water: 44 tons
     - On freeboard deck: 105 tons
     - Above deck: 315 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     41,309 lbs / 18,737 Kg = 36.7 x 13.1 " / 333 mm shells or 8.2 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 5.5 ft / 1.7 m
   Roll period: 17.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.78
   Seaboat quality (Average = 1.00): 1.56

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.564 / 0.566
   Length to Beam Ratio: 5.50 : 1
   'Natural speed' for length: 23.27 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 25.59 ft / 7.80 m, 23.13 ft / 7.05 m
     - Forward deck:   47.00 %, 23.13 ft / 7.05 m, 20.67 ft / 6.30 m
     - Aft deck:   18.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Quarter deck:   15.00 %, 11.48 ft / 3.50 m, 12.47 ft / 3.80 m
     - Average freeboard:      18.98 ft / 5.78 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 71.8 %
      - Above water (accommodation/working, high = better): 124.9 %
   Waterplane Area: 33,909 Square feet or 3,150 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 200 lbs/sq ft or 974 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 1.97
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Miscellaneous weight :
Reserve : 140t

AD :
230t : FC
25t : LR Radio
25t : Searchlight Tower (NF)
25t : Hulesmeyer Prox station keeping device
10t : SR Air Command Radio
0t : SR Radio

OD
5t : Paravanes
50t : 2x Fighter/Scout Floatplanes
40t : 2x Scout Floatplanes
10t : 2x Gunpowder cat

HAW
22t : CO2 compressor AC
22t : Extra Fire Suppresion

HBW
22t : Extra pumps
165t : Torpedo nets
10t : (1+9) 1t double wall tanks 9t AVGAS + Aviation supplies
5t : Fire Ext for AvGast
13t : Aux Diesel Generator, 10x1.3=13t, 244 kw
Last 15nm range = Diesel fuel.

Rebuild upperhull.
+6.30 Forecastle
+3.50 Top of upper belt, 30mm protective deck.
+1.50 Top of Main Belt
+1.00 Crown of PD, 3rd Deck
-1.50 2nd deck, bottom belt, lower PD, top bulge
-4.00 1st deck
-8.10 Engineering

Laminate additional deck armor (effective thickness)
+30mm : quarterdeck (49mm)
+30mm : main citadel deck (89mm)

Vertical protection :
Total : 135mm
Effective : 30/2 + (65 +(30*0.8)) = 104mm

Waterline Horizontal : 355+ ((65+(30*.8)* 1.5 )/2 )
= 421.75mm

Final deck armor = 2924- 2041 = 883

TDS : 4.5m deep, 38m STS
The deep 1.5m bulge on each side extends from bottom of belt to keel. The bulge is reskinned to a thinner 9mm, thought to reduce potential splinter generation.

The 3m department is divided into an outer 2m
and inner 1m wide, seperateded by a mild steel divider. Originally Coal and fuel oil, these are now
9mm || bulge ||Hull|| -void ||divider|| 2m fuel oil|| 1m void || 2x19mm STS

The inner compartment is backed by twinned 2x19mm STS, rising to the waterline.

Time : (22+9)*0.25)+ (5.75/2) = 10.24mo

Cost HY : $ 8.27, 2.88 bp

Enki, Parthian Dreadnaught laid down 1907

Displacement:
   21,998 t light; 23,550 t standard; 24,648 t normal; 25,526 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (548.20 ft / 541.34 ft) x 88.58 ft (Bulges 98.43 ft) x (28.71 / 29.61 ft)
   (167.09 m / 165.00 m) x 27.00 m (Bulges 30.00 m) x (8.75 / 9.03 m)

Armament:
10 - 13.58" / 345 mm 40.0 cal guns - 1,201.52lbs / 545.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1904 Model
     5 x Twin mounts on centreline, evenly spread
      2 raised mounts
8 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1899 Model
     8 x Single mounts on side ends, evenly spread
      4 raised mounts - superfiring
12 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1899 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
12 - 2.36" / 60.0 mm 50.0 cal guns - 6.61lbs / 3.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1904 Model
     12 x Single mounts on side ends, evenly spread
      12 double raised mounts
Weight of broadside 14,872 lbs / 6,746 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.0" / 355 mm   351.87 ft / 107.25 m   9.84 ft / 3.00 m
   Ends:   3.94" / 100 mm   189.44 ft / 57.74 m   9.84 ft / 3.00 m
   Upper:   5.31" / 135 mm   319.06 ft / 97.25 m   6.56 ft / 2.00 m
     Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.50" / 38 mm   351.87 ft / 107.25 m   26.57 ft / 8.10 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

- Hull Bulges:
      0.47" / 12 mm   351.87 ft / 107.25 m   24.61 ft / 7.50 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   7.09" / 180 mm      14.0" / 355 mm
   2nd:   5.31" / 135 mm   2.56" / 65 mm      5.31" / 135 mm
   3rd:   5.31" / 135 mm   0.98" / 25 mm      0.98" / 25 mm

- Protected deck - multiple decks:
   For and Aft decks: 3.74" / 95 mm
   Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 5.31" / 135 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 26,398 shp / 19,693 Kw = 20.00 kts
   Range 5,655nm at 10.00 kts
   Bunker at max displacement = 1,977 tons (20% coal)

Complement:
   983 - 1,278

Cost:
   £2.167 million / $8.667 million

Distribution of weights at normal displacement:
   Armament: 2,421 tons, 9.8 %
     - Guns: 2,421 tons, 9.8 %
   Armour: 8,917 tons, 36.2 %
     - Belts: 2,894 tons, 11.7 %
     - Torpedo bulkhead: 518 tons, 2.1 %
     - Bulges: 151 tons, 0.6 %
     - Armament: 2,961 tons, 12.0 %
     - Armour Deck: 2,041 tons, 8.3 %
     - Conning Towers: 352 tons, 1.4 %
   Machinery: 1,528 tons, 6.2 %
   Hull, fittings & equipment: 8,706 tons, 35.3 %
   Fuel, ammunition & stores: 2,649 tons, 10.7 %
   Miscellaneous weights: 427 tons, 1.7 %
     - Bulge void weights: 50 tons
     - On freeboard deck: 110 tons
     - Above deck: 267 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     34,840 lbs / 15,803 Kg = 27.8 x 13.6 " / 345 mm shells or 6.4 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 17.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.76
   Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.564 / 0.566
   Length to Beam Ratio: 5.50 : 1
   'Natural speed' for length: 23.27 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 25.59 ft / 7.80 m, 23.62 ft / 7.20 m
     - Forward deck:   47.00 %, 23.62 ft / 7.20 m, 19.69 ft / 6.00 m
     - Aft deck:   18.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Quarter deck:   15.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
     - Average freeboard:      18.85 ft / 5.74 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 84.1 %
      - Above water (accommodation/working, high = better): 123.8 %
   Waterplane Area: 33,909 Square feet or 3,150 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 197 lbs/sq ft or 959 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.83
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Following close on the heels of the Gilgamesh class, the Enkis feature much the same hull, but incorporate the new fire control concepts and torpedo defenses. As part of the expectation of this new system is greater ranges, the extreme armor of the Gilgamesh class can be slightly slimmed down, allowing a slightly smaller warship.

With the inclusion of torpedo bulkheads and increased range, the torpedo flats and torpedo nets are ommitted, but the hull blister is retained.

The forecastle rises slowly to the bow, but the total height gain of 1.8m (5.9ft) only conflicts with 0 elevation or depressed forward fire.

+6.0 forecastle
+3.5 weather, Top of upper belt for 33%, 30mm protective deck
+1.5 Top of Main Belt
+1.0 3rd , Crown of 65mm protective deck
-1.5 2nd , bottom of belt, edge of protective deck, top of bulge
-4.0 1st
-8.10 Engineering Deck

Miscellaneous weight
50t Const Reserve
242 1912 FC
25 LR Radio

110 Improved Evaporative ventilation

1911 basic refit
Improve FC to 1910

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

1922 Fleet refits :
Basic Refit Misc Weight
Remove 12x 60L50 QF M
Add 6x 2G 57L60AA M - 35t total

AD
243t - Fire Control 1918
25t - LR Radio
+25t -Searchlight Tower
+25t - Hulesmeyer

OD
+5t - Paravanes

Kaiser Kirk · August 13, 2017, 11:59:25 AM

Class Name : Tiamat
Parthian Gilgamesh laid down 1909,
basic refit prior to acceptance, 1913
Basic refit 1922.
Refurbishment 1932.

BB - 13 Tiamat
BB - 14 Agni
BB - 15 Adad
BB - 16 Anzu

QuoteTiamat, Parthian Gilgamesh laid down 1909 (Engine 1932)

Displacement:
29,031 t light; 31,622 t standard; 32,961 t normal; 34,032 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(557.74 ft / 551.18 ft) x 101.71 ft (Bulges 111.55 ft) x (31.17 / 32.08 ft)
(170.00 m / 168.00 m) x 31.00 m (Bulges 34.00 m) x (9.50 / 9.78 m)

Armament:
10 - 15.35" / 390 mm 46.0 cal guns - 1,984.16lbs / 900.00kg shells, 118 per gun
Breech loading guns in turret on barbette mounts, 1929 Model
5 x 2-gun mounts on centreline, evenly spread
2 raised mounts
16 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 393 per gun
Dual purpose guns in deck and hoist mounts, 1929 Model
8 x 2-gun mounts on sides, evenly spread
12 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 393 per gun
Dual purpose guns in casemate mounts, 1929 Model
12 x Single mounts on sides, evenly spread
12 hull mounts in casemates- Limited use in heavy seas
32 - 1.46" / 37.0 mm 54.0 cal guns - 1.65lbs / 0.75kg shells, 2,600 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
6 x 2 row quad mounts on side ends, majority forward
6 raised mounts
2 x 2 row quad mounts on centreline ends, evenly spread
2 double raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Breech loading guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 22,313 lbs / 10,121 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 355 mm 358.27 ft / 109.20 m 9.84 ft / 3.00 m
Ends: 1.38" / 35 mm 192.88 ft / 58.79 m 8.20 ft / 2.50 m
Upper: 4.72" / 120 mm 325.46 ft / 99.20 m 11.32 ft / 3.45 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.81" / 46 mm 358.27 ft / 109.20 m 29.13 ft / 8.88 m
Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Hull Bulges:
0.35" / 9 mm 358.27 ft / 109.20 m 26.25 ft / 8.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.09" / 180 mm 13.8" / 350 mm
2nd: 2.56" / 65 mm 1.57" / 40 mm 1.57" / 40 mm
3rd: 4.72" / 120 mm 0.98" / 25 mm 0.98" / 25 mm
4th: 0.31" / 8 mm - -
5th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 5.51" / 140 mm
Forecastle: 1.18" / 30 mm Quarter deck: 3.15" / 80 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 2.56" / 65 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 32,165 shp / 23,995 Kw = 20.00 kts
Range 5,600nm at 14.00 kts
Bunker at max displacement = 2,410 tons

Complement:
1,223 - 1,590

Cost:
£3.090 million / $12.360 million

Distribution of weights at normal displacement:
Armament: 4,360 tons, 13.2 %
- Guns: 4,360 tons, 13.2 %
Armour: 11,689 tons, 35.5 %
- Belts: 3,089 tons, 9.4 %
- Torpedo bulkhead: 699 tons, 2.1 %
- Bulges: 123 tons, 0.4 %
- Armament: 3,659 tons, 11.1 %
- Armour Deck: 3,751 tons, 11.4 %
- Conning Towers: 366 tons, 1.1 %
Machinery: 949 tons, 2.9 %
Hull, fittings & equipment: 10,813 tons, 32.8 %
Fuel, ammunition & stores: 3,930 tons, 11.9 %
Miscellaneous weights: 1,219 tons, 3.7 %
- Hull below water: 465 tons
- Bulge void weights: 100 tons
- Hull above water: 58 tons
- On freeboard deck: 75 tons
- Above deck: 521 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,644 lbs / 19,797 Kg = 24.1 x 15.4 " / 390 mm shells or 8.0 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 6.9 ft / 2.1 m
Roll period: 17.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.39

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.602 / 0.604
Length to Beam Ratio: 4.94 : 1
'Natural speed' for length: 23.48 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 11.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 25.92 ft / 7.90 m, 23.79 ft / 7.25 m
- Forward deck: 35.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
- Aft deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 18.73 ft / 5.71 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.5 %
- Above water (accommodation/working, high = better): 116.4 %
Waterplane Area: 41,077 Square feet or 3,816 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 225 lbs/sq ft or 1,100 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.90
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Completed in 1912, they were contenders for the most powerful dreadnaughts for a time. By 1932 while still formidable, they are worn down and not to current standards and they were refurbished.

The original 390L46 was developed as a 2G version would fit in the barbettes of the Triple 365L40.

The new 390mm gun, developed with the 1925 artillery tech, fires a heavier shell, gaining ~10mm penetration over the earlier 390mm.

This replaces the 165mm deck and casements with 130mm firing the new heavy 39kg shell.
The 130mm was originally chosen as 2G would fit 1G 165mm mountings, while the 39kg was chosen as the heaviest practicle single-piece round.

The 130mm deck "DP" is expected to allow engagement against surface threats and aerial threats from high altitude to dive bombers to torpedo bombers.

The 130mm casements are rated "DP" to indicate the are equipped for engaging torpedo bombers as well.

Between the deck and casement 130s,
up to 14x 130mm can bear on broadside.

The original vessel has turbines, so Turbo-Electric is not required,
but the extra manueverability, subdivision, and reserves of electric power
are viewed as useful.

Range : 6440nm

Armor Lamination :
Forecastle : 0mm : 0g
Upper Deck : 0mm : 0t
Citadel Main deck : +55mm : 1349t
Quarter Deck : +45mm :162t

Total Vertical :
upper : 30
Main : 65 + (55* 0.8) = 109
Cumulatve : 30/2 + 109 = 124

Total Waterline :
Main : 355
Deck : ((65+ (55*.8))*1.5)/2 = 81.75
TDS : 46 /2 = 23
Total : 459.75

IZ own guns :
12km - 27km

New Misc Wt :
100t - Reserve

AD
436t - FC 1918
25t - LR radio
10t - SR Radio - AC control
0t - SR radio
25t - Hulesmeyer Proximity Detector
25t - Searchlight tower (NF)

OD
5t - Paravanes
50t - 2 Floatplanes (1x Ftr, 1x Scout)
10t - Hanger in aft superstructure
10t - 2x Gunpowder CAT- launching port/starboard above Y.

HAW
29t - CO2 Compressor AC
29t - Extra Fire Ext

HBW
168t - Torpedo Nets
29t - Extra Pumps
30t - 1000kw Aux Diesel
238 - Turbogenerators

Decks : First two are 2.44m, but engineering spaces carry through both, the rest are 2.5m.
+6.5 forecastle deck.
+4.0 top of upper belt., armored weather deck 30mm
+1.5 top of main belt
+1m 4th deck , Crown of protective deck
-1.5 3rd Deck, Bottom of main belt, bottom of protective deck edge, deck x
-4m 2nd Deck.
-6.44m 1st Deck, pierced by Turbines amidships

Tiamat, Parthian Gilgamesh laid down 1909

Displacement:
   28,995 t light; 31,371 t standard; 32,961 t normal; 34,232 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (557.74 ft / 551.18 ft) x 101.71 ft (Bulges 111.55 ft) x (31.17 / 32.25 ft)
   (170.00 m / 168.00 m) x 31.00 m (Bulges 34.00 m) x (9.50 / 9.83 m)

Armament:
15 - 14.37" / 365 mm 40.0 cal guns - 1,421.98lbs / 645.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     5 x 3-gun mounts on centreline, evenly spread
      2 raised mounts
8 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1899 Model
     8 x Single mounts on sides, evenly spread
12 - 6.50" / 165 mm 45.0 cal guns - 138.89lbs / 63.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1899 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
4 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Quick firing guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
Weight of broadside 24,205 lbs / 10,979 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.0" / 355 mm   358.27 ft / 109.20 m   9.84 ft / 3.00 m
   Ends:   3.94" / 100 mm   192.88 ft / 58.79 m   8.20 ft / 2.50 m
   Upper:   4.72" / 120 mm   325.46 ft / 99.20 m   11.32 ft / 3.45 m
     Main Belt covers 100 % of normal length

The main belt is backed by the 65mm protective deck.

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   358.27 ft / 109.20 m   29.13 ft / 8.88 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Hull Bulges:
      0.47" / 12 mm   358.27 ft / 109.20 m   26.25 ft / 8.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   6.50" / 165 mm      13.8" / 350 mm
   2nd:   4.72" / 120 mm   1.38" / 35 mm      3.94" / 100 mm
   3rd:   4.72" / 120 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.31" / 8 mm     -           -

- Protected deck - multiple decks:
   For and Aft decks: 3.74" / 95 mm
   Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 4.72" / 120 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 32,165 shp / 23,995 Kw = 20.00 kts
   Range 7,775nm at 10.00 kts
   Bunker at max displacement = 2,862 tons (20% coal)

Complement:
   1,223 - 1,590

Cost:
   £3.179 million / $12.715 million

Distribution of weights at normal displacement:
   Armament: 4,498 tons, 13.6 %
     - Guns: 4,498 tons, 13.6 %
   Armour: 11,060 tons, 33.6 %
     - Belts: 3,241 tons, 9.8 %
     - Torpedo bulkhead: 699 tons, 2.1 %
     - Bulges: 164 tons, 0.5 %
     - Armament: 4,042 tons, 12.3 %
     - Armour Deck: 2,500 tons, 7.6 %
     - Conning Towers: 414 tons, 1.3 %
   Machinery: 1,489 tons, 4.5 %
   Hull, fittings & equipment: 11,070 tons, 33.6 %
   Fuel, ammunition & stores: 3,965 tons, 12.0 %
   Miscellaneous weights: 878 tons, 2.7 %
     - Hull below water: 168 tons
     - Bulge void weights: 75 tons
     - Hull above water: 20 tons
     - On freeboard deck: 140 tons
     - Above deck: 475 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40,896 lbs / 18,550 Kg = 27.6 x 14.4 " / 365 mm shells or 7.4 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 6.7 ft / 2.0 m
   Roll period: 18.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.72
   Seaboat quality (Average = 1.00): 1.36

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.602 / 0.604
   Length to Beam Ratio: 4.94 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 25.92 ft / 7.90 m, 23.62 ft / 7.20 m
     - Forward deck:   35.00 %, 23.62 ft / 7.20 m, 21.33 ft / 6.50 m
     - Aft deck:   30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Quarter deck:   15.00 %, 13.12 ft / 4.00 m, 14.76 ft / 4.50 m
     - Average freeboard:      18.80 ft / 5.73 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.4 %
      - Above water (accommodation/working, high = better): 116.2 %
   Waterplane Area: 41,077 Square feet or 3,816 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 232 lbs/sq ft or 1,131 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.90
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Tiamat was a Babalyonian sea goddess, to some a dragon, but a ruler of the waves. The Tiamat class is Parthia's assertion that she rules the Indian Ocean. The dramatic increases in range over the past several years meant the older guns were less capable of belt penetrations at that range, which is solved with the new gun. Meanwhile, ship sizes had been spiraling upwards, and while Tiamat is 23% larger thant Gilgamesh, she carries 50% more guns and has far better underwater protection as well.

Armor Details
The upper belt extends from B to Y turrets (and so is shorter than the main), rises to the forecastle deck forward, and weather deck aft, and is capped by a 35mm upper armored deck. With the mainbelt covering the bottom 0.5m, 42% of the upper belt extends 2m high and 58% covers 4.5m high, for an average height of 3.45m

The 350mm main belt is backed by a 65mm slope of the protective deck. While the 350mm belt is expected to be sufficient at ranges of 10km, the additional backing is thought to be valuable if night fighting is to occur. The main belt rises 0.5m above the crown of the protective deck to prevent shells in a shallow dive from passing over the main belt and striking the slopes of the protective deck .

Behind the bulges for standoff distance, the Torpedo Bulkhead consists of a 1.5 void with an 8mm bulkhead, then a 2m liquid (fuel oil) filled compartment backed by twinned 19mm (making 38) bulkheads.

Misc Weight :
25t - long range radio
450t - fire control 1918
140t - extra ventilation
20t - Admiral's quarters
75t - Void, Construction Reserve.
168t - Torpedo nets

1913 Basic Refit:
With 2 on sea trials and 2 completing, the early lessons of the Sino-Japanese war were evaluated.
The fire control was upgraded to the newest 1912
The 60mm guns were removed as ineffectual to stop torpedo launches, and replaced with 4 AA guns for anti-Zeppelin work.
Realizing the the torpedo threat may be higher than expected- particularly in night battles, the internal torpedo bulkhead was supplemented by torpedo nets.

Decks : First two are 2.44m, but engineering spaces carry through both, the rest are 2.5m.
+6.5 forecastle deck.
+4.0 top of upper belt., armored weather deck 30mm
+1.5 top of main belt
+1m 4th deck , Crown of protective deck
-1.5 3rd Deck, Bottom of main belt, bottom of protective deck edge, deck x
-4m 2nd Deck.
-6.44m 1st Deck, pierced by Turbines amidships
-8.88m Engineering deck.

1913-1914 fleet refits :
Improve FC to 1912: Primitive FC computers -14km

1922 fleet Refits :
Upgrade fire control to 1918

Kaiser Kirk · February 14, 2021, 08:34:14 PM

Class Name : Stormbringer
Parthian Gilgamesh laid down 1915
Basic AA Refit 1929.

BB- 17 "Stormbringer"
BB- 18 "Mournblade"

# Built : 2 building
# Active : 0
# Lost : 0

Quote
Stormbringer, Partha Battleship laid down 1915

Displacement:
34,047 t light; 36,310 t standard; 38,484 t normal; 40,223 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(620.51 ft / 613.52 ft) x 104.99 ft (Bulges 114.83 ft) x (30.35 / 31.60 ft)
(189.13 m / 187.00 m) x 32.00 m (Bulges 35.00 m) x (9.25 / 9.63 m)

Armament:
10 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1915 Model
2 x 3-gun mounts on centreline ends, evenly spread
2 x 2-gun mounts on centreline ends, evenly spread
2 raised mounts
12 - 6.50" / 165 mm 43.0 cal guns - 133.89lbs / 60.73kg shells, 240 per gun
Quick firing guns in casemate mounts, 1915 Model
12 x Single mounts on sides, evenly spread
12 hull mounts in casemates- Limited use in heavy seas
8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 240 per gun
Quick firing guns in deck and hoist mounts, 1915 Model
8 x Single mounts on sides, evenly spread
12 - 3.54" / 90.0 mm 54.0 cal guns - 23.92lbs / 10.85kg shells, 600 per gun
Anti-air guns in deck mounts, 1915 Model
4 x 2-gun mounts on side ends, evenly spread
4 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
32 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Machine guns in deck mounts, 1915 Model
16 x Twin mounts on sides, evenly spread
16 double raised mounts
Weight of broadside 17,935 lbs / 8,135 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.8" / 350 mm 368.11 ft / 112.20 m 15.19 ft / 4.63 m
Ends: 2.56" / 65 mm 245.37 ft / 74.79 m 12.80 ft / 3.90 m
Upper: 3.54" / 90 mm 314.96 ft / 96.00 m 12.63 ft / 3.85 m
Main Belt covers 92 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.81" / 46 mm 368.11 ft / 112.20 m 33.79 ft / 10.30 m
Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
0.51" / 13 mm 355.84 ft / 108.46 m 22.15 ft / 6.75 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.2" / 360 mm 7.87" / 200 mm 13.8" / 350 mm
2nd: 3.94" / 100 mm 0.98" / 25 mm 0.98" / 25 mm
3rd: 2.56" / 65 mm 0.98" / 25 mm 2.56" / 65 mm
4th: 0.31" / 8 mm - -
5th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 4.92" / 125 mm
Forecastle: 1.18" / 30 mm Quarter deck: 3.54" / 90 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 3.54" / 90 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 96,558 shp / 72,032 Kw = 26.00 kts
Range 9,000nm at 12.00 kts
Bunker at max displacement = 3,913 tons

Complement:
1,373 - 1,785

Cost:
£4.782 million / $19.128 million

Distribution of weights at normal displacement:
Armament: 3,683 tons, 9.6 %
- Guns: 3,683 tons, 9.6 %
Armour: 13,668 tons, 35.5 %
- Belts: 4,454 tons, 11.6 %
- Torpedo bulkhead: 834 tons, 2.2 %
- Bulges: 149 tons, 0.4 %
- Armament: 3,891 tons, 10.1 %
- Armour Deck: 3,910 tons, 10.2 %
- Conning Towers: 430 tons, 1.1 %
Machinery: 3,657 tons, 9.5 %
Hull, fittings & equipment: 12,223 tons, 31.8 %
Fuel, ammunition & stores: 4,437 tons, 11.5 %
Miscellaneous weights: 815 tons, 2.1 %
- Hull below water: 222 tons
- Bulge void weights: 38 tons
- Hull above water: 35 tons
- On freeboard deck: 70 tons
- Above deck: 450 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
54,554 lbs / 24,745 Kg = 36.8 x 14.4 " / 365 mm shells or 9.1 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 8.2 ft / 2.5 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.630 / 0.632
Length to Beam Ratio: 5.34 : 1
'Natural speed' for length: 24.77 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 26.08 ft / 7.95 m, 24.44 ft / 7.45 m
- Forward deck: 28.00 %, 24.44 ft / 7.45 m, 21.16 ft / 6.45 m
- Aft deck: 32.00 %, 21.16 ft / 6.45 m, 21.16 ft / 6.45 m
- Quarter deck: 15.00 %, 21.16 ft / 6.45 m, 22.80 ft / 6.95 m
- Average freeboard: 22.73 ft / 6.93 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.4 %
- Above water (accommodation/working, high = better): 147.4 %
Waterplane Area: 48,442 Square feet or 4,500 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 206 lbs/sq ft or 1,006 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.72
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

Originally to be named for Sea Gods from the Middle East
I did not find ones I wanted.

Named for a pair of mythological magical swords, who's names are definitely taken from the Elric series by Moorcock
and we'll call it an accident of 'translation'.

Secondary : Like the Iowa class which has it's 5" battery in two rows on each side,
the 4 x 165mm guns on each side are staggered. The mounts are enclosed against blast.
This is allows all 4 to fire on broadside, and 4 to fire forward, and 4 aft.
When combined with the casement guns, and adequate weather, this gives 10 Foreward/Broadside/Aft

4 6
2 8
A B X Y
1 7
3 5

Belt width :
+2.6 to +1.4m : : Tapers from 200mm to 350mm
+1.40 to - 1.5m : 350 MB
-1.5 to - 2.5m : MB : Tapers from 355mm to 200mm (275 average)

This means
1.2m * 200mm + 1.2m * (350-200)/2 = 240,000mm3+90,000mm3 = 330,000mm3
2.9m * 350mm = 1,015,000mm3
1.0m * 200mm + 1.0m * (350-200)/2 = 200,000mm3 + 75000mm3 = 275,000mm
Total : 1,620,000 cubic mm
Average thickness of 350mm = (1,620,000/350) = 4,628mm high, or 4.63m.

The upper belt is 3.85m, extending from"B" to "X",

The TDS is 3.5m deep on each side, with a 1.5m exterior bulge with a 13mm STS skin.
The Bulge is air loaded, to disconnect any shockwave. The adjacent hull is high tensile steel (3/4":18mm) for maximum flex. Then there is a 1.75m fuel loaded compartment backed by a 18mm ductile armor plate. This will allow the shockwave to be evenly distributed and slow or stop any splinters. Behind that is a 1.75m void backed by 30mm armored bulkhead. This provides expansion space for any shockwave and a final barrier, an 8mm flooding bulkhead located 5m from the point of detonation.

Miscellaneous weight :

Void :
38t : Construction Reserve

Above Deck
375t : FC 1918
25t : LR Radio
25t : Hulesmeyer
25t : Searchlight Tower

On Deck :
5t Paravanes
50t : Floatplane Fighter & Scout
5t : Gunpowder Cat
10t : Hanger structure

H-AW
35t - C02 compresser A/C

HBW:
187t : Torpedo Nets
35t : Extra Pumps

Stormbringer, Parthian Battleship laid down 1915

Displacement:
   34,116 t light; 36,310 t standard; 38,484 t normal; 40,223 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.51 ft / 613.52 ft) x 104.99 ft (Bulges 114.83 ft) x (30.35 / 31.60 ft)
   (189.13 m / 187.00 m) x 32.00 m (Bulges 35.00 m) x (9.25 / 9.63 m)

Armament:
10 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     2 x 3-gun mounts on centreline ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
12 - 6.50" / 165 mm 50.0 cal guns - 143.30lbs / 65.00kg shells, 240 per gun
     Quick firing guns in casemate mounts, 1915 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 240 per gun
     Quick firing guns in deck and hoist mounts, 1915 Model
     8 x Single mounts on sides, evenly spread
6 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 600 per gun
     Anti-air guns in deck mounts, 1915 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
     2 x Single mounts on centreline ends, evenly spread
      2 double raised mounts
16 - 0.45" / 11.4 mm 72.0 cal guns - 0.04lbs / 0.02kg shells, 5,000 per gun
     Machine guns in deck mounts, 1915 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 17,893 lbs / 8,116 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   368.11 ft / 112.20 m   15.19 ft / 4.63 m
   Ends:   2.56" / 65 mm   245.37 ft / 74.79 m   12.80 ft / 3.90 m
   Upper:   3.54" / 90 mm   314.96 ft / 96.00 m   12.63 ft / 3.85 m
     Main Belt covers 92 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   368.11 ft / 112.20 m   33.79 ft / 10.30 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
      0.51" / 13 mm   355.84 ft / 108.46 m   22.15 ft / 6.75 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.2" / 360 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      0.98" / 25 mm
   3rd:   2.56" / 65 mm   0.98" / 25 mm      2.56" / 65 mm
   4th:   0.31" / 8 mm     -           -

- Protected deck - multiple decks:
   For and Aft decks: 4.92" / 125 mm
   Forecastle: 1.18" / 30 mm Quarter deck: 3.54" / 90 mm

- Conning towers: Forward 13.98" / 355 mm, Aft 3.54" / 90 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 96,558 shp / 72,032 Kw = 26.00 kts
   Range 9,000nm at 12.00 kts
   Bunker at max displacement = 3,913 tons

Complement:
   1,373 - 1,785

Cost:
   £4.796 million / $19.184 million

Distribution of weights at normal displacement:
   Armament: 3,711 tons, 9.6 %
     - Guns: 3,711 tons, 9.6 %
   Armour: 13,662 tons, 35.5 %
     - Belts: 4,454 tons, 11.6 %
     - Torpedo bulkhead: 834 tons, 2.2 %
     - Bulges: 149 tons, 0.4 %
     - Armament: 3,885 tons, 10.1 %
     - Armour Deck: 3,910 tons, 10.2 %
     - Conning Towers: 430 tons, 1.1 %
   Machinery: 3,657 tons, 9.5 %
   Hull, fittings & equipment: 12,183 tons, 31.7 %
   Fuel, ammunition & stores: 4,368 tons, 11.4 %
   Miscellaneous weights: 903 tons, 2.3 %
     - Hull below water: 222 tons
     - Bulge void weights: 250 tons
     - Hull above water: 35 tons
     - Above deck: 396 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     54,772 lbs / 24,844 Kg = 36.9 x 14.4 " / 365 mm shells or 9.1 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 8.3 ft / 2.5 m
   Roll period: 16.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.630 / 0.632
   Length to Beam Ratio: 5.34 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   25.00 %, 26.08 ft / 7.95 m, 24.44 ft / 7.45 m
     - Forward deck:   28.00 %, 24.44 ft / 7.45 m, 21.16 ft / 6.45 m
     - Aft deck:   32.00 %, 21.16 ft / 6.45 m, 21.16 ft / 6.45 m
     - Quarter deck:   15.00 %, 21.16 ft / 6.45 m, 22.80 ft / 6.95 m
     - Average freeboard:      22.73 ft / 6.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.4 %
      - Above water (accommodation/working, high = better): 147.4 %
   Waterplane Area: 48,442 Square feet or 4,500 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 206 lbs/sq ft or 1,005 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.72
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Miscellaneous weight :
Void :
280t : Construction Reserve

Above Deck
371t : FC 1918
25t : LR Radio

On Deck :

H-AW
35t - C02 compressor A/C

HBW:
187t : Torpedo Nets
35t : Extra Pumps

Decks :
+6.45 Weather deck 35mm
+3.90m : Battery Deck
+2.6m: Top taped belt
+1.40m : Crown of protective deck 90mm, Top of TDS
-1.10m : Lower edge of protective deck
-2.5m : Bottom tapered belt
-3.60 : 2nd deck
-6.10 : 1st Deck
-8.60 : Engineering Deck
-8.81m : Double Bottom
-9.25m : Keel

1922 fleet Refits :
Upgrade fire control to 1918

Kaiser Kirk · October 10, 2021, 11:05:35 AM

Class Name : Vazya
Parthian Gilgamesh laid down 1916
Basic AA Refit 1929

BB - 19 Vazya
BB - 20 Vidyudabhi

# Built : 2
# Active : 2
# Lost : 0

Quote
Vazrya BR29, Parthian Gilgamesh laid down 1916

Displacement:
39,211 t light; 42,118 t standard; 43,971 t normal; 45,454 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(620.08 ft / 613.52 ft) x 111.55 ft (Bulges 121.39 ft) x (31.17 / 32.15 ft)
(189.00 m / 187.00 m) x 34.00 m (Bulges 37.00 m) x (9.50 / 9.80 m)

Armament:
20 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 105 per gun
Breech loading guns in turret on barbette mounts, 1916 Model
5 x 4-gun mounts on centreline, evenly spread
2 raised mounts
8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 300 per gun
Quick firing guns in deck and hoist mounts, 1916 Model
4 x 2-gun mounts on side ends, evenly spread
12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
Quick firing guns in casemate mounts, 1916 Model
8 x Single mounts on sides, forward evenly spread
8 hull mounts in casemates- Limited use in heavy seas
4 x Single mounts on sides, aft evenly spread
4 hull mounts in casemates- Limited use in heavy seas
12 - 3.54" / 90.0 mm 54.0 cal guns - 23.92lbs / 10.85kg shells, 400 per gun
Anti-air guns in deck and hoist mounts, 1916 Model
4 x 2-gun mounts on side ends, evenly spread
4 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
32 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,000 per gun
Machine guns in deck mounts, 1928 Model
16 x Twin mounts on sides, evenly spread
16 double raised mounts
Weight of broadside 31,475 lbs / 14,277 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.8" / 350 mm 398.79 ft / 121.55 m 14.37 ft / 4.38 m
Ends: 1.18" / 30 mm 214.70 ft / 65.44 m 8.20 ft / 2.50 m
Upper: 2.56" / 65 mm 333.17 ft / 101.55 m 6.30 ft / 1.92 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.81" / 46 mm 398.79 ft / 121.55 m 34.94 ft / 10.65 m
Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
0.51" / 13 mm 398.79 ft / 121.55 m 24.61 ft / 7.50 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.2" / 360 mm 7.87" / 200 mm 13.0" / 330 mm
2nd: 2.56" / 65 mm 1.18" / 30 mm 2.56" / 65 mm
3rd: 2.56" / 65 mm 1.18" / 30 mm 1.18" / 30 mm
4th: 0.24" / 6 mm - -
5th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 4.92" / 125 mm
Forecastle: 1.18" / 30 mm Quarter deck: 2.95" / 75 mm

- Conning towers: Forward 13.78" / 350 mm, Aft 3.54" / 90 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 38,249 shp / 28,534 Kw = 20.00 kts
Range 7,080nm at 12.00 kts
Bunker at max displacement = 3,336 tons

Complement:
1,517 - 1,973

Cost:
£7.370 million / $29.482 million

Distribution of weights at normal displacement:
Armament: 6,602 tons, 15.0 %
- Guns: 6,602 tons, 15.0 %
Armour: 14,288 tons, 32.5 %
- Belts: 3,892 tons, 8.9 %
- Torpedo bulkhead: 934 tons, 2.1 %
- Bulges: 186 tons, 0.4 %
- Armament: 4,465 tons, 10.2 %
- Armour Deck: 4,347 tons, 9.9 %
- Conning Towers: 465 tons, 1.1 %
Machinery: 1,425 tons, 3.2 %
Hull, fittings & equipment: 14,389 tons, 32.7 %
Fuel, ammunition & stores: 4,760 tons, 10.8 %
Miscellaneous weights: 2,507 tons, 5.7 %
- Hull below water: 594 tons
- Bulge void weights: 50 tons
- Hull above water: 39 tons
- On freeboard deck: 354 tons
- Above deck: 1,470 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
51,967 lbs / 23,572 Kg = 35.0 x 14.4 " / 365 mm shells or 9.1 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 7.5 ft / 2.3 m
Roll period: 18.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.69
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a round stern
Block coefficient (normal/deep): 0.663 / 0.665
Length to Beam Ratio: 5.05 : 1
'Natural speed' for length: 24.77 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 23.79 ft / 7.25 m, 23.79 ft / 7.25 m
- Forward deck: 35.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
- Aft deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.94 ft / 4.25 m
- Average freeboard: 18.62 ft / 5.68 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 121.3 %
Waterplane Area: 53,053 Square feet or 4,929 Square metres
Displacement factor (Displacement / loading): 92 %
Structure weight / hull surface area: 248 lbs/sq ft or 1,213 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.49
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Divine names
Vazra - holy thunderbolt. (vedic Varju)
Vidyudabhi - Parashu / Battle axe of Shiva

The speed is kept to the 20knots of the other ships of the line, with the expectation that fleets will meet at points of decision, such as Aden or within the confines of the Red Sea, and speed will be of limited value. Further, it is expected that a battleline is only as fast as it's slowest vessel, so battle damage will be a swift equalizer.

Armor and torpedo defenses are on a massive scale for the period. Fire control is doubled, and housed in armored towers to ensure that the concentration of firepower is not severely hindered by a lucky hit.

A thick main belt is backed by a heavy protective deck, with the top of the torpedo bulkhead rising behind that.

Electric drive is adopted, allowing machinery to be divided up and improving torpedo resistance yet further. When the full propeller reversal allowed by Electric drive is combined with the short beamy hull, the vessel is surprisingly maneuverable.

Armored Fire Control Towers :
Armored Fire Control Towers were originally modeled as The 5th battery of 4 single 100/1500 mounts, double raised.
This was changed in the 1929 refit to be just misc weight modeling.

They are meant to be fore/aft and each beam.
representing 4 x 15m rangefinders mounted high and protected from shell splinters up to 420mm (70x6). The Barbette's are armored communication shafts for damage control crews or below-deck evacuation routes.

Weaponry :

primary
The main guns are a new 365mm / 45 caliber weapon. Qualifying as a 16" class wth 5800ME , they propell their 675kg shell at 861m/s.

Combat range is expected to be 18000m or less, roughly where the whole hull of an opposing vessel is visible. The battles of 1905, 1912, and 1914 all saw ranges considerably below fire control range, and armor is provided for that eventuality.

At this time, consideration of optical rangefinding extending to the horizon and potentially slightly beyond puts a range of 24,000m as possible. At that range, the combined decks should still stop the incoming shell, and the splinter deck the splinters. Angle of fall would be ~23degrees.

5 quad turrets are arranged in A B Q X Y
The forecastle is extended to 35% to include Q as on the same level as A.

Secondary
The 130mm QF is a step down from the previous 165mm , but felt capable of tracking and sinking a rapidly moving destroyer or MTB

On the main deck, 4 twin guns, one at each corner, are arranged. These are enclosed gun mounts to enable them to be worked despite main gun blast. When not engaging MTBs/DDs, these guns are primarily expected to fire starshell or ranging shots to establish and maintain a range ladder, using dye-bag shells.

Casements :
The Casement guns are mounted 6 per side, 4 "forward" and 2 "aft". The forward guns are mounted on the weather deck level at +4m to try to raise them above the bow wave make them less wet. The aft guns are mounted at the +1.5m level of the crown of the protective deck Each gun has it's own internal screen of 30mm armor.

Armor Details

Upper Belt
The upper belt is to defeat HE and splinters, and extends from B to Y turrets, rises to the forecastle deck foreward, and weather deck aft, and is capped by a 30mm upper armored deck.

The forecastle rises, for an average height of 6.875

With the mainbelt covering to 2.6m above sea level, the upper belt aft is only 1.4m, while foreward it is 4.275.
This gives a weighted average height of 1.92

Main Belt

The 350mm main belt is backed by a 75mm slope of the protective deck. While the 350mm belt is expected to be sufficient at ranges of 10km, the additional backing is thought to be valuable if short range fighting due to night or poor weather is to occur.

Below the 75mm protective deck is an additional 20mm splinter deck, to stop ejecta from the protective deck.
This seals to the TDS at both edges (as the TDS rises to the bottom of the protective deck).
The below waterline areas are heavily subdivided. Much of their communications paths route up through the splinter deck and pass under the protective deck.

Main Belt Tapered

The Main belt is tapered as follows.

Crown of protective deck is at +1.5m above waterline.
Bottom edge of protective deck is at -1.0m below waterline.

For 1.1m above the Crown, the Main belt tapers from 350mm to 210mm at it's upper edge. This will intercept and stop shells "own gun shells" fired at 24000m or less (aka 23degrees or less)
For 3.5m, from the 1.5m Crown to -2m, the Main belt is 350mm.

This gives a volume of
Above Crown : 399,000mm3
Central : 1,092,000mm3

Total : 1,491,000mm3
Average : 4,260mm @ 350mm thickness

Torpedo Defense

Bulge : Rising from the keel to the bottom of the main belt is a thin-skinned bulge 1.5m thick. This

Behind the Main Belt, the turtleback of the protective deck, is the TDS which rises 1.5 m above the waterline to seal to the 75mm deck at the knucle of the downturn. This is expected to stop ejecta from the turtleback should the main belt be penetrated.

The Torpedo Bulkhead consists :
1.5m bulge (13mm armor skin) ,
the hull plating,
1.25m Fuel compartment,
13mm armored bulkhead,
1.25m void space
a 25mm armored bulkhead,
followed by a 1.5m damage control corridor and an 8mm armored bulkhead to restrict flooding from any leaks.

This makes for a 1.5m external, 3m internal depth, with an additional 1.5m warded from flooding.
The 2x 4.5m depth internally makes the beam between bulkheads (34-9=25) 25m.

Between the Torpedo nets to stop the torpedoes, the bulge for standoff distance, the TDS to absorb the shock, and the minute subdivision of the Electric Drive, the ships are expected to be resilient against torpedoes.

Misc Weight
Void - 50t Reserve

AD
25t - LR Radio
25t- Hulesmeyer
25t- Searchlight tower
1320t - FC 1918 2 sets (670t each)
75t- Admirals Quarters and Flag Bridge

OD
5t - Paravanes
284t - Four Armored Communication tubes & FC installation (70mm)\
50t - 2x Floatplanes (1 ftr, 1 scout)
5t - Gunpowder CAT
10t - Hanger

HAW
39t - CO2 compressor AC

HBW
187 - Torpedo Nets
357t- Electric Drive (True range 8194 aka 28 days)
50t - Additional Pumps

Displacement:
   39,250 t light; 42,118 t standard; 43,971 t normal; 45,454 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 613.52 ft) x 111.55 ft (Bulges 121.39 ft) x (31.17 / 32.15 ft)
   (189.00 m / 187.00 m) x 34.00 m (Bulges 37.00 m) x (9.50 / 9.80 m)

Armament:
20 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 105 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     5 x 4-gun mounts on centreline, evenly spread
      2 raised mounts
8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 300 per gun
     Quick firing guns in deck and hoist mounts, 1916 Model
     4 x 2-gun mounts on side ends, evenly spread
12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1916 Model
     8 x Single mounts on sides, forward evenly spread
      8 hull mounts in casemates- Limited use in heavy seas
     4 x Single mounts on sides, aft evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
6 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck and hoist mounts, 1916 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
     2 x Single mounts on centreline ends, evenly spread
      2 double raised mounts
4 - 3.94" / 100 mm 150.0 cal guns - 37.79lbs / 17.14kg shells, 0 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
Weight of broadside 31,470 lbs / 14,275 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   398.79 ft / 121.55 m   14.37 ft / 4.38 m
   Ends:   1.18" / 30 mm   214.70 ft / 65.44 m   8.20 ft / 2.50 m
   Upper:   2.56" / 65 mm   333.17 ft / 101.55 m   6.30 ft / 1.92 m
     Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   398.79 ft / 121.55 m   34.94 ft / 10.65 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
      0.51" / 13 mm   398.79 ft / 121.55 m   24.61 ft / 7.50 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.2" / 360 mm   7.87" / 200 mm      13.0" / 330 mm
   2nd:   2.56" / 65 mm   1.18" / 30 mm      2.56" / 65 mm
   3rd:   2.56" / 65 mm   1.18" / 30 mm      1.18" / 30 mm
   4th:   0.24" / 6 mm     -           -
   5th:   2.76" / 70 mm   2.76" / 70 mm      2.76" / 70 mm

- Protected deck - multiple decks:
   For and Aft decks: 4.92" / 125 mm
   Forecastle: 1.18" / 30 mm Quarter deck: 2.95" / 75 mm

- Conning towers: Forward 13.78" / 350 mm, Aft 3.54" / 90 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 38,249 shp / 28,534 Kw = 20.00 kts
   Range 7,080nm at 12.00 kts
   Bunker at max displacement = 3,336 tons

Complement:
   1,517 - 1,973

Cost:
   £7.418 million / $29.671 million

Distribution of weights at normal displacement:
   Armament: 6,693 tons, 15.2 %
     - Guns: 6,693 tons, 15.2 %
   Armour: 14,417 tons, 32.8 %
     - Belts: 3,892 tons, 8.9 %
     - Torpedo bulkhead: 934 tons, 2.1 %
     - Bulges: 186 tons, 0.4 %
     - Armament: 4,593 tons, 10.4 %
     - Armour Deck: 4,347 tons, 9.9 %
     - Conning Towers: 465 tons, 1.1 %
   Machinery: 1,425 tons, 3.2 %
   Hull, fittings & equipment: 14,507 tons, 33.0 %
   Fuel, ammunition & stores: 4,721 tons, 10.7 %
   Miscellaneous weights: 2,209 tons, 5.0 %
     - Hull below water: 407 tons
     - Bulge void weights: 100 tons
     - Hull above water: 237 tons
     - On freeboard deck: 100 tons
     - Above deck: 1,365 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     51,480 lbs / 23,351 Kg = 34.7 x 14.4 " / 365 mm shells or 9.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 7.4 ft / 2.2 m
   Roll period: 18.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.663 / 0.665
   Length to Beam Ratio: 5.05 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 23.79 ft / 7.25 m, 23.79 ft / 7.25 m
     - Forward deck:   35.00 %, 23.79 ft / 7.25 m, 21.33 ft / 6.50 m
     - Aft deck:   30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Quarter deck:   15.00 %, 13.12 ft / 4.00 m, 13.94 ft / 4.25 m
     - Average freeboard:      18.62 ft / 5.68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.8 %
      - Above water (accommodation/working, high = better): 121.3 %
   Waterplane Area: 53,053 Square feet or 4,929 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 251 lbs/sq ft or 1,225 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.48
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weight :
Void
100t - Reserve

AD
25t - long range radio
1340t - fire control, 2 sets (670 ea) - 1918
Note : 5th battery is meant to represent 4 splintered armored fire control positions - 2 fore/aft and 2 each beam. The "ammo hoist" barbettes are damage control/evac routes from the deep hull area.

On Deck
75t - Admiral's quarters and flag bridge
25t - Searchlight Tower

HAW
50t - "Windmaker" CO2 Compression refrigeration for ventilation & cooling.
187t- Torpedo Nets

HBW
357t - Electric drive (true range 8194 aka 28 days)
50t - Additional Pumps

Decks : The upper two decks cover 5.5m, and are 2.75m high each. From the Protective deck down, the lower decks are 2.45m.
+6.5 forecastle deck.
+4.0 top of upper belt., armored weather deck 30mm
+2.6 top of main belt tapers from 210mm at top to 350mm at lower edge
+1.5 350mm main belt
+1.5m 4th deck , Crown of 75mm protective deck , top of TDS, top end belt
-1.00 3rd Deck, Splinter Deck 20mmm. Seals to TDS. bottom of protective deck edge, bottom end belt
-2.0 Bottom of main belt
-3.5m 2nd Deck.
-6.00m 1st Deck, pierced by engineering
-8.50m Engineering deck.
-9.15m Double Bottom

1922 fleet Refits :
Upgrade fire control to 1918

Kaiser Kirk · March 05, 2023, 10:18:44 PM

Kalifern , Parthian Battleship laid down 1923

BB - 21 Kalifern - mythical land across the sea with plains giving way to towering mountains where live the Griffens.
BB - 22 Hvaniratha - mythical mountain created as the center - associated with a peak in the Albrux mountains.

Displacement:
   38,000 t light; 41,568 t standard; 44,212 t normal; 46,326 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.12 ft / 616.80 ft) x 114.83 ft (Bulges 124.67 ft) x (31.33 / 32.71 ft)
   (189.93 m / 188.00 m) x 35.00 m (Bulges 38.00 m) x (9.55 / 9.97 m)

Armament:
16 - 14.37" / 365 mm 50.0 cal guns - 1,719.61lbs / 780.00kg shells, 160 per gun
     Breech loading guns in turret on barbette mounts, 1923 Model
     4 x 4-gun mounts on centreline, evenly spread
      2 raised mounts
16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 227 per gun
     Quick firing guns in deck and hoist mounts, 1923 Model
     8 x 2-gun mounts on sides, evenly spread
10 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck and hoist mounts, 1923 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 800 per gun
     Anti-air guns in deck and hoist mounts, 1923 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 double raised mounts
16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1923 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 28,940 lbs / 13,127 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   400.92 ft / 122.20 m   13.32 ft / 4.06 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length
    Main Belt inclined -10.00 degrees (positive = in)

The lower portion of the belt tapers.
The upper 2.5m is a uniform 350mm, extending 0.5m below WL.
the lower 1.5m tapers from 350mm down to 310mm.

Mathwise that means there are 3 sections.
| |
| | A ) Upper, 2500mm (2.5m) x 350mm
\ | |
\| | C) Lower back , 1500 (1.5m) x 310mm

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   400.92 ft / 122.20 m   34.94 ft / 10.65 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

- Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   23.13 ft / 7.05 m

TDS is raised to the underside of the Armor deck at 1.5m above waterline, behind the armor belt, and serves as splinter protection.

TDS : Bulge ||9mm mild hull||, 1m liquid ||9mm mild||, 1m void ||9mm armor||, 1m liquid || armored (2x19=38mm)||,1.5m Dam control/ flooding ||(9mm mild)||
Depth : 1.5m exterior, 3m interior to main bulkhead, 1.5m to second bulkhead. Total :6m, 57mm STS steel

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   16.7" / 425 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   1.97" / 50 mm   1.38" / 35 mm      1.57" / 40 mm
   3rd:   0.98" / 25 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.24" / 6 mm     -           -
   5th:   0.12" / 3 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 5.48" / 139* mm
   Forecastle: 1.38" / 35 mm Quarter deck: 3.94" / 100 mm

* Which means vertical is a 135mm deck with a 35mm splinter box over the magazines.

- Conning towers: Forward 13.78" / 350 mm, Aft 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 39,000 shp / 29,094 Kw = 20.11 kts
   Range 8,722nm at 14.00 kts
   Bunker at max displacement = 4,758 tons

Complement:
   1,523 - 1,981

Cost:
   £12.420 million / $49.681 million

Distribution of weights at normal displacement:
   Armament: 6,187 tons, 14.0 %
     - Guns: 6,187 tons, 14.0 %
   Armour: 14,151 tons, 32.0 %
     - Belts: 3,322 tons, 7.5 %
     - Torpedo bulkhead: 1,163 tons, 2.6 %
     - Bulges: 120 tons, 0.3 %
     - Armament: 4,108 tons, 9.3 %
     - Armour Deck: 4,988 tons, 11.3 %
     - Conning Towers: 451 tons, 1.0 %
   Machinery: 1,303 tons, 2.9 %
   Hull, fittings & equipment: 14,646 tons, 33.1 %
   Fuel, ammunition & stores: 6,211 tons, 14.0 %
   Miscellaneous weights: 1,712 tons, 3.9 %
     - Hull below water: 592 tons
     - Bulge void weights: 290 tons
     - Hull above water: 76 tons
     - On freeboard deck: 60 tons
     - Above deck: 694 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     55,171 lbs / 25,025 Kg = 37.2 x 14.4 " / 365 mm shells or 10.4 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 8.8 ft / 2.7 m
   Roll period: 17.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality (Average = 1.00): 1.28

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.642 / 0.645
   Length to Beam Ratio: 4.95 : 1
   'Natural speed' for length: 24.84 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 27.40 ft / 8.35 m, 24.93 ft / 7.60 m
     - Forward deck:   20.00 %, 24.93 ft / 7.60 m, 22.47 ft / 6.85 m
     - Aft deck:   45.00 %, 14.27 ft / 4.35 m, 14.27 ft / 4.35 m
     - Quarter deck:   15.00 %, 14.27 ft / 4.35 m, 14.27 ft / 4.35 m
     - Average freeboard:      18.49 ft / 5.64 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.2 %
      - Above water (accommodation/working, high = better): 115.7 %
   Waterplane Area: 53,872 Square feet or 5,005 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 247 lbs/sq ft or 1,208 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.57
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Deck Guns
Deck guns are echloned outwards, like on Iowa,
allowing 4 to bear ahead (8 guns), or 4 on each side.
The single 90m AA are above them.

Main Belt Armor
This embraces "all or nothing", but only has 1 deck level unprotected aft and 2 forward.
The main armor deck caps the belt at 1.5m.

Outsloped Wedge shaped Belt
Three steps
1) Figure adjusted height for wedge
2) figure % additional belt height for outsloping
3) apply +% to effective height of wedge.

Step 1
In the VII version, the lower portion of the belt tapers.
The upper 2.5m is a uniform 350mm, extending 0.5m below WL.
the lower 1.5m tapers from 350mm down to 310mm.

Mathwise that means there are 3 sections.
| |
| | A ) Upper, 2500mm (2.5m) x 350mm
\ | |
\| | C) Lower back , 1500 (1.5m) x 310mm
B) Wedge 1/2B x H :
B = 1.5m = 1500
H = 350-310 = 40

A) = 875,000
B) = 30,000
C) = 465,000

SubTotal : 1,370,000
Modeled as average 350mm thickness = /350
Total : 3,914.27857 = 3.91m

Belt is slightly outsloped by 15%.
Step 2 Outsloping
Overall it is 4m high. which is "A" or adjacent
COS 10 = A/H
H* Cos 15 = A
H = A/Cos 15

Which gives 4.1411or 4.15 as the height.
4.141 / 4 = 1.03425

Step 3, applying the outsloping mod to the effective belt height
This is 1.034% more height than the standard 4m non-wedge shaped.
The effective height of the wedge shaped 4m belt is 3.91m of 350mm
So 1.034 * 3.91 = 4.04294m = 4.04

What if I had rounded up?
1.035 * 3.92 = 4.0572 = 4.06

All of which 'saved' only about 80 tons.

Deck Armor
Deck Armored is modeled as two parts
A 35/135/100 main armored deck : 4853 tons
and a 35mm box around the magazines : 133 tons
Which is a total of 4986 tons

To model that, the deck thickness is shown as
35 / 139.2 /100
Which weighs 4988t

Which means vertical is a 135mm deck with a 35mm splinter box over the magazines.

Like most 'all or nothing' the Forecastle and Quarterdeck sections
are set up as protective decks.

TDS
Raised to the underside of the Armor deck at 1.5m above waterline.

TDS : Bulge ||9mm mild hull||, 1m liquid ||9mm mild||, 1m void ||9mm armor||, 1m liquid || armored (2x19=38mm)||,1.5m Dam control/ flooding ||(9mm mild)||
Depth : 1.5m exterior, 3m interior to main bulkhead, 1.5m to second bulkhead. Total :6m, 57mm STS steel

There is a 35mm Box around the magazines this adds 130 tons,
boosting total deck to 4574

290t Reserve Wt

619t Fire Control - 1918
25 LR Radio
25 Searchlight Tower
25 Hulesmeyer device

25t +5t : Fighter/Scout floatplane + Gunpowder Cat
25t +5t : Fighter/Scout floatplane + Gunpowder Cat

38t Additional fire suppresion
38t CO2 Air conditioning

38t Extra pumps
331t turbo electric
186t torpedo nets
15t Enhanced Hydrophones

Decks
+4.35 Weather deck
+1.5 Armor Deck 125mm , top of TDS.
-1.2 3rd Deck
-2.5 bottom main belt
-3.2 2nd Deck
-5.7 1st Deck
-8.2 Engineering
-9.16 Double Bottom

Kaiser Kirk · September 17, 2023, 04:43:57 PM

Wirozag, Parthian Battleship laid down 1928

BB - 23 Wirozag - 'Thunderbolt' aka Lightning
BB - 24 Yarranidan - 'Thunderclap' aka Thunder

Quote
Displacement:
38,000 t light; 40,568 t standard; 43,024 t normal; 44,989 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(623.07 ft / 616.80 ft) x 114.83 ft (Bulges 124.67 ft) x (31.33 / 32.63 ft)
(189.91 m / 188.00 m) x 35.00 m (Bulges 38.00 m) x (9.55 / 9.95 m)

Armament:
10 - 15.35" / 390 mm 46.0 cal guns - 1,915.82lbs / 869.00kg shells, 134 per gun
Breech loading guns in turret on barbette mounts, 1928 Model
2 x 3-gun mounts on centreline ends, evenly spread
2 x 2-gun mounts on centreline ends, evenly spread
2 raised mounts
16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 230 per gun
Quick firing guns in deck and hoist mounts, 1928 Model
8 x 2-gun mounts on sides, evenly spread
16 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
Anti-air guns in deck and hoist mounts, 1928 Model
6 x 2-gun mounts on sides, evenly spread
6 raised mounts
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 800 per gun
Anti-air guns in deck and hoist mounts, 1928 Model
4 x 2-gun mounts on side ends, evenly spread
4 double raised mounts
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
Machine guns in deck mounts, 1928 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 20,730 lbs / 9,403 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.8" / 350 mm 400.92 ft / 122.20 m 13.88 ft / 4.23 m
Ends: 1.57" / 40 mm 215.85 ft / 65.79 m 14.76 ft / 4.50 m
Main Belt covers 100 % of normal length
Main Belt inclined -12.00 degrees (positive = in)

Main belt is a uniform 350mm from +1.5m to -0.5m, and then tapers to 230m at -3m
The Main Belt is outsloped by 15%, the 57mm of TDS rises behind the belt to the armored deck
as a splinter barrier.

Horizontal simple : 350 * 1.15 + (57/2) = 431
Magazines have an additional 50mm box

- Torpedo Bulkhead - Additional damage containing bulkheads:
2.24" / 57 mm 400.92 ft / 122.20 m 34.74 ft / 10.59 m
Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Hull Bulges:
0.35" / 9 mm 400.92 ft / 122.20 m 21.49 ft / 6.55 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 17.1" / 435 mm 7.09" / 180 mm 13.4" / 340 mm
2nd: 1.97" / 50 mm 1.57" / 40 mm 1.57" / 40 mm
3rd: 0.59" / 15 mm 0.31" / 8 mm 0.31" / 8 mm
4th: 0.31" / 8 mm - -
5th: 0.31" / 8 mm - -

- Armoured deck - single deck:
For and Aft decks: 5.50" / 140 mm
Forecastle: 1.57" / 40 mm Quarter deck: 5.31" / 135 mm

The citadel is 135mm with a 50mm box around the magazines
Vertical protection simple: 135 + 50/2 = 160

- Conning towers: Forward 14.96" / 380 mm, Aft 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 104,439 shp / 77,912 Kw = 26.00 kts
Range 8,680nm at 14.00 kts
Bunker at max displacement = 4,422 tons

Complement:
1,493 - 1,941

Cost:
£14.265 million / $57.058 million

Distribution of weights at normal displacement:
Armament: 4,324 tons, 10.0 %
- Guns: 4,324 tons, 10.0 %
Armour: 14,762 tons, 34.3 %
- Belts: 3,638 tons, 8.5 %
- Torpedo bulkhead: 1,157 tons, 2.7 %
- Bulges: 113 tons, 0.3 %
- Armament: 4,341 tons, 10.1 %
- Armour Deck: 5,077 tons, 11.8 %
- Conning Towers: 437 tons, 1.0 %
Machinery: 3,252 tons, 7.6 %
Hull, fittings & equipment: 14,590 tons, 33.9 %
Fuel, ammunition & stores: 5,024 tons, 11.7 %
Miscellaneous weights: 1,073 tons, 2.5 %
- Hull below water: 254 tons
- Bulge void weights: 155 tons
- Hull above water: 76 tons
- On freeboard deck: 70 tons
- Above deck: 518 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
62,372 lbs / 28,291 Kg = 34.5 x 15.4 " / 390 mm shells or 11.5 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 7.8 ft / 2.4 m
Roll period: 18.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a round stern
Block coefficient (normal/deep): 0.625 / 0.628
Length to Beam Ratio: 4.95 : 1
'Natural speed' for length: 24.84 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.53 ft / 9.00 m, 29.53 ft / 9.00 m
- Forward deck: 25.00 %, 29.53 ft / 9.00 m, 29.53 ft / 9.00 m
- Aft deck: 40.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
- Quarter deck: 15.00 %, 21.33 ft / 6.50 m, 22.31 ft / 6.80 m
- Average freeboard: 25.09 ft / 7.65 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 165.6 %
Waterplane Area: 53,021 Square feet or 4,926 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 225 lbs/sq ft or 1,100 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.95
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

TDS
Raised to the underside of the Armor deck at 1.5m above waterline. Serves as internal splinter belt.

TDS :
9mm mild hull || 1.5m Bulge ||9mm mild hull||
1.5m liquid ||9mm mild||, 1m void ||9mm mild||, 1.5m liquid || armored (2x19=38mm)||,1.5m Dam control/ flooding ||( 19mm Armored )||

Depth : 1.5m exterior, 4m interior to main bulkhead, 1.5m to second bulkhead. Total :7m, 57mm STS steel

150t Reserve Wt

AD
433t Fire Control
25t LR Radio
25t Searchlight Tower (NF)
25t Hulesmeyer prox detector
10t SR Radio for AC
0t SR Radio

5t : Paravanes
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
10t : Hanger
5t : Fire Ext for hanger.

HAW
38t Additional fire suppresion
38t CO2 Air conditioning

HBW
38t Extra pumps
188t torpedo nets
10t : (1+9) 1t double wall tanks 9t AVGAS+Aviation supplies
5t : Fire ext for Avgas.
13t : Aux Diesel Generator, 10x1.3=13t, 244kw
Last 30nm range = Diesel fuel

Decks
+6.5 Weather Deck
+4.00 Battery Deck
+1.5 Armor Deck 130mm , top of TDS.
-1.0 3rd Deck
-3.0 bottom main belt , top bulge
-3.5 2nd Deck
-8.0 Engineering
-9.09 Double Bottom

Step 1
The belt covers from 1.5m to -3m.
The lower portion of the belt tapers.
The upper 2.0m is a uniform 350mm, extending 0.5m below WL.
the lower 2.5m tapers from 350mm down to 230mm.
The bulge extends from the lower edge of the belt to the keel.
The TDS rises behind the belt and seals to the armor deck, adding
57mm behind it.

Mathwise that means there are 3 sections.
| |
| | A ) Upper, 2000mm (2.0m) x 350mm
\ | |
\| | C) Lower back , 2500 (2.5m) x 230mm
B) Wedge 1/2 B x H :
B = 2.5m = 2500
H = 350-230 = 120
B = 2500/2 * 120= 150000

A) = 700,000
B) = 150,000
C) = 575,000

SubTotal : 1,425,000
Modeled as average 350mm thickness = /350
Total : 4071.428= 4.08m

Main Belt is outsloped by 15%.

Step 2 Outsloping
Overall it is 4.08m high. which is "A" or adjacent

COS 15 = A/H
H* Cos 15 = A
H = A/Cos 15

Which gives 4.2239 or 4.23 as the height.

4.7 wt : 3845
4.23 wt : 3461
384 difference

End Belts are not outsloped,

Deck Armor
Deck Armored is modeled as two parts
A 40/135/135 main armored deck : 4928 tons
and a 50mm box around the magazines : 148 tons
TOTAL : 5076

To model that, the deck thickness is shown as
40/ 139.7 /135
Which weighs 5077t

Which means vertical is a 135mm deck with a 50mm splinter box over the magazines.

Like most 'all or nothing' the Forecastle and Quarterdeck sections
are set up as protective decks, with the End belts extending from +1.5 above (level with crown) to -3m below, keeping the outer shell free of splinter holes, and effectively reinforcing the area around any large shell hole.

Kaiser Kirk · May 06, 2024, 11:16:42 PM

BB-25 Frawar "Bastion", laid down 1932.0

QuoteDisplacement:
   19,000 t light; 20,417 t standard; 21,625 t normal; 22,592 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (459.32 ft / 452.76 ft) x 91.86 ft (Bulges 95.14 ft) x (30.61 / 31.75 ft)
   (140.00 m / 138.00 m) x 28.00 m (Bulges 29.00 m) x (9.33 / 9.68 m)

Armament:
8 - 13.11" / 333 mm 43.0 cal guns - 1,311.75lbs / 595.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1927 Model
     2 x 4-gun mounts on centreline ends, evenly spread
16 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 320 per gun
     Dual purpose guns in deck and hoist mounts, 1930 Model
     6 x 2-gun mounts on sides, evenly spread
      2 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 3,000 per gun
     Anti-air guns in deck and hoist mounts, 1930 Model
     4 x 2 row quad mounts on side ends, evenly spread
      4 raised mounts
     2 x 2 row quad mounts on sides, forward deck centre
      2 double raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     12 x Twin mounts on sides, evenly spread
      12 double raised mounts
Weight of broadside 11,922 lbs / 5,408 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.0" / 330 mm   294.29 ft / 89.70 m   13.78 ft / 4.20 m
   Ends:   1.38" / 35 mm   158.43 ft / 48.29 m   12.01 ft / 3.66 m
   Upper:   2.95" / 75 mm   294.29 ft / 89.70 m   13.58 ft / 4.14 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

Waterline protection : 330mm (belt) outsloped backed by the 105mm protective deck and the 38mm TDS = 330+ (105*1.5)/2 + 38/2 = 428

End Belts : These are thickened slopes for protective decks,
so 70mm slopes fore, and 145mm slopes aft.

- Torpedo Bulkhead - Additional damage containing bulkheads:
      1.50" / 38 mm   294.29 ft / 89.70 m   31.79 ft / 9.69 m
   Beam between torpedo bulkheads 62.34 ft / 19.00 m

- Hull Bulges:
      0.35" / 9 mm   301.84 ft / 92.00 m   22.41 ft / 6.83 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   4.72" / 120 mm      10.2" / 260 mm
   2nd:   2.56" / 65 mm   1.57" / 40 mm      1.97" / 50 mm
   3rd:   0.31" / 8 mm   0.31" / 8 mm      0.31" / 8 mm
   4th:   0.31" / 8 mm     -           -

- Protected deck - multiple decks:
   For and Aft decks: 5.51" / 140 mm
   Forecastle: 1.38" / 35 mm Quarter deck: 4.13" / 105 mm

Decks : The citadel is protected by a 35mm upper deck and 105mm protective deck, for a vertical of 122mm. The upper deck thereby serves as a bomb deck to activate and detonate the shells and bombs short of the main deck.

- Conning towers: Forward 10.04" / 255 mm, Aft 2.56" / 65 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 54,769 shp / 40,858 Kw = 24.00 kts
   Range 6,726nm at 14.00 kts
   Bunker at max displacement = 2,175 tons

Complement:
   891 - 1,159

Cost:
   £8.172 million / $32.687 million

Distribution of weights at normal displacement:
   Armament: 2,153 tons, 10.0 %
     - Guns: 2,153 tons, 10.0 %
   Armour: 7,857 tons, 36.3 %
     - Belts: 3,035 tons, 14.0 %
     - Torpedo bulkhead: 518 tons, 2.4 %
     - Bulges: 89 tons, 0.4 %
     - Armament: 1,230 tons, 5.7 %
     - Armour Deck: 2,774 tons, 12.8 %
     - Conning Towers: 211 tons, 1.0 %
   Machinery: 1,617 tons, 7.5 %
   Hull, fittings & equipment: 6,760 tons, 31.3 %
   Fuel, ammunition & stores: 2,625 tons, 12.1 %
   Miscellaneous weights: 614 tons, 2.8 %
     - Hull below water: 157 tons
     - Bulge void weights: 97 tons
     - Hull above water: 38 tons
     - On freeboard deck: 30 tons
     - Above deck: 292 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     30,578 lbs / 13,870 Kg = 27.1 x 13.1 " / 333 mm shells or 5.8 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.63
   Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.574 / 0.578
   Length to Beam Ratio: 4.76 : 1
   'Natural speed' for length: 21.28 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 23.62 ft / 7.20 m, 21.16 ft / 6.45 m
     - Forward deck:   32.50 %, 21.16 ft / 6.45 m, 18.70 ft / 5.70 m
     - Aft deck:   32.50 %, 18.70 ft / 5.70 m, 18.70 ft / 5.70 m
     - Quarter deck:   15.00 %, 18.70 ft / 5.70 m, 19.69 ft / 6.00 m
     - Average freeboard:      19.86 ft / 6.05 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.9 %
      - Above water (accommodation/working, high = better): 122.6 %
   Waterplane Area: 29,688 Square feet or 2,758 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 183 lbs/sq ft or 893 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 3.10
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Designed as a 'cheap' replacement to the old predreadnaughts capable of supporting the territorial fleets and providing convoy escorts. These could also oppose similar byzantine ships, but would compete in the build order with the Armored cruisers.

The class reverts to a protected deck and armored upper citadel.
The upper armored deck is 35mm, proof against bombs and QF

Armor
35mm bomb deck is above 2 deck space, excluding HE, and detonating AP prior to main deck
Upper Belt covers from freeboard to top of main belt.
Main Belt Covers from +1 m above crown of 105mm protective deck to protect its slopes 2.5m below waterline.
The TDS rises to seal to the bottom of the protective deck, serving as a splinter and explosion barrier.

Upper Belt :

Upper Belt is 4m high.
It is outsloped at 15%
4/cos(15) = 4.1411 = 4.14

Main Belt :
Covers from 1.7m above WL to -2.5m below WL, a total height of 4.2m.
The first 3.2m is full thickness, the last 1m tapers to 230mm.

volume
1040 = 3.2 * 325
277.5 = ((325-230)/2 * 1) + (1*230)
-----
1317.5 volume
divide by 325mm thickness
4.0538m high
It is outsloped at 15%.
4.0538/cos(15) = 4.1968 = 4.20

Waterline protection : 330mm (belt) outsloped backed by the 105mm protective deck and the 38mm TDS = 330+ (105*1.5)/2 + 38/2 = 428

End Belts : These are thickened slopes for protective decks,
so 70mm slopes fore, and 145mm slopes aft.

Decks : The citadel is protected by a 35mm upper deck and 105mm protective deck, for a vertical of 122mm. The upper deck thereby serves as a bomb deck to activate and detonate the shells and bombs short of the main deck.

The slopes of the protective deck are largely protected by the main belt rising above it.

TDS : TDS rises to seal to the bottom of the protective deck at +0.7 above WL

Reserve : 97t

AD
217t - Fire Control 1930
25t - LR Radio
25t - Hulesmeyer
25t - Searchlight Tower (NF)

OD
5t - Paravanes
20t- Scout Plane - on stern
5t - Gunpowder Cat

HAW
19t - Extra Fire Extinguishers
19t - CO2 Compressor AC

HBW
19t - Extra Pumps
138t - Torpedo Nets

Decks
+5.7 Weather deck - 35mm
+3.2 Battery Deck
+1.7 top of main belt, bottom of upper belt
+0.7 Crown of porotective deck 100mm, Top TDS
-1.8 bottom of protective deck slope,
-2.5 bottom of main belt
-4.30 1st platform deck
-7.80 Engineering Deck
-8.79 double bottom, bottom of torpedo defenses
-9.33 Keel

Kaiser Kirk · January 05, 2025, 01:32:01 PM

Arwand, Parthian Battleship laid down 1932

BB-26 Arwand "Valiant", laid 1932.5
BB-27 Kenwar "Vindictive", laid 1932.5
BB-28 Tundih "Vehemence ", laid 1934.5
BB-29 Arbahwizeh "Victory", laid 1935.5

QuoteDisplacement:
45,000 t light; 48,229 t standard; 51,043 t normal; 53,295 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(711.69 ft / 705.38 ft) x 114.83 ft (Bulges 124.67 ft) x (31.50 / 32.77 ft)
(216.92 m / 215.00 m) x 35.00 m (Bulges 38.00 m) x (9.60 / 9.99 m)

Armament:
8 - 17.13" / 435 mm 47.0 cal guns - 2,711.69lbs / 1,230.00kg shells, 140 per gun
Breech loading guns in turret on barbette mounts, 1930 Model
2 x 4-gun mounts on centreline, evenly spread
20 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 400 per gun
Dual purpose guns in deck and hoist mounts, 1931 Model
8 x 2-gun mounts on side ends, evenly spread
4 raised mounts - superfiring
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
40 - 1.46" / 37.0 mm 70.0 cal guns - 1.73lbs / 0.78kg shells, 6,000 per gun
Anti-air guns in deck and hoist mounts, 1929 Model
10 x 2-gun mounts on sides, evenly spread
8 raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.43lbs / 0.20kg shells, 8,000 per gun
Machine guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 22,875 lbs / 10,376 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.1" / 410 mm 458.50 ft / 139.75 m 18.73 ft / 5.71 m
Ends: 1.38" / 35 mm 246.85 ft / 75.24 m 12.01 ft / 3.66 m
Main Belt covers 100 % of normal length
Main Belt inclined -20.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.97" / 50 mm 458.50 ft / 139.75 m 30.84 ft / 9.40 m
Beam between torpedo bulkheads 75.46 ft / 23.00 m

- Hull Bulges:
0.35" / 9 mm 416.67 ft / 127.00 m 22.97 ft / 7.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 19.7" / 500 mm 7.87" / 200 mm 16.1" / 410 mm
2nd: 2.36" / 60 mm 1.57" / 40 mm 1.57" / 40 mm
3rd: 0.31" / 8 mm - -
4th: 0.31" / 8 mm - -

- Protected deck - single deck:
For and Aft decks: 7.36" / 187 mm
Forecastle: 1.57" / 40 mm Quarter deck: 5.51" / 140 mm

- Conning towers: Forward 6.50" / 165 mm, Aft 6.50" / 165 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 109,000 shp / 81,314 Kw = 26.00 kts
Range 6,760nm at 16.00 kts
Bunker at max displacement = 5,066 tons

Complement:
1,697 - 2,207

Cost:
£18.966 million / $75.864 million

Distribution of weights at normal displacement:
Armament: 4,532 tons, 8.9 %
- Guns: 4,532 tons, 8.9 %
Armour: 18,326 tons, 35.9 %
- Belts: 6,271 tons, 12.3 %
- Torpedo bulkhead: 1,030 tons, 2.0 %
- Bulges: 125 tons, 0.2 %
- Armament: 2,839 tons, 5.6 %
- Armour Deck: 7,675 tons, 15.0 %
- Conning Towers: 385 tons, 0.8 %
Machinery: 3,217 tons, 6.3 %
Hull, fittings & equipment: 16,657 tons, 32.6 %
Fuel, ammunition & stores: 6,044 tons, 11.8 %
Miscellaneous weights: 2,267 tons, 4.4 %
- Hull below water: 1,164 tons
- Bulge void weights: 220 tons
- Hull above water: 90 tons
- On freeboard deck: 180 tons
- Above deck: 613 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
83,086 lbs / 37,687 Kg = 33.1 x 17.1 " / 435 mm shells or 14.2 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 10.2 ft / 3.1 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.41
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a round stern
Block coefficient (normal/deep): 0.645 / 0.647
Length to Beam Ratio: 5.66 : 1
'Natural speed' for length: 26.56 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.69 ft / 9.05 m, 27.23 ft / 8.30 m
- Forward deck: 46.00 %, 27.23 ft / 8.30 m, 24.77 ft / 7.55 m
- Aft deck: 19.00 %, 16.73 ft / 5.10 m, 16.73 ft / 5.10 m
- Quarter deck: 15.00 %, 16.73 ft / 5.10 m, 16.73 ft / 5.10 m
- Average freeboard: 23.29 ft / 7.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.7 %
- Above water (accommodation/working, high = better): 161.5 %
Waterplane Area: 61,765 Square feet or 5,738 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 221 lbs/sq ft or 1,078 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

The Arwand class is rated for 26 knots, matching both the Expeditionary fleet, and the most recent Byzantine line ships.

Introducing the inclined belt in service, along with the 435L47 gun, the class introduces a new level of protection and lethality, while retaining a speed painstakingly slow to outsiders.

In typical Parthian fashion, they expect to have an ...expansive... Immunity Zone.
From 15km to 29km, complete
From 13km to 30+km, partial
magazines : from ~8km +

Armor Scheme:

Conceding the chance of a con is low, and that actually stopping a main battery round with no concussive damage or ejecta unlikely, the conning armor is reduced to 165mm, sufficient for most round and all splinters. The Aux con is armored to the same level. A CIC below the main armored deck is provided.

Deck
The Deck armor over the citadel is :
140mm main - 5159t
40mm splinter protective deck - 1,474
75mm over magazines. - 251

40mm protective deck forward - 161
140mm protective deck aft - 628
(each with +35mm slopes)
----
Subtotal : 7673

186.9mm Total Tonnage : 7675

The 140mm main deck caps the belt armor system and is meant to stop shells at all reasonable ranges. This is backed by a substantial 40mm splinter deck. This is meant to stop high order splinters from either the belt or deck from penetrating the vitals.

Forward, a 40mm protective deck guards the bow, and aft a 140mm protective deck guards the stern.

Vertical Protection Effective
Over magazines : 140 + 40/2 +75/2 = 197.5 mm
over machinery : 140 + 40/2 = 160mm

Belt
Exterior 80mm decapping plate, interior 330mm belt inclined 20degrees.
The 80mm decapping plate should work on up to 470mm shells.

Waterline effective
80mm decapping, 330 inclined, 40mm Protective Deck, 57mm TDS
80/2 + 330/0.8 (decapped pen) + 40*1.5/2 + 57/2=
520.5mm at waterline
558mm at magazines at waterline.

An exterior 80mm decapping plate also serves to defeat HE shells and bombs.

Underwater, below the exterior belt, is the exterior bulge.

The interior belt is sloped at 20 degrees and is 330mm above the waterline, tapering once 1m below the waterline down to 230mmm.

Belt Armor Math:
a) determine volume of decapping plate, volume of main belt & tapered section for full height.
tapering will reduce volume compared to full thickness.

b) Goal is to show on SS full thickness, but adjust height for same volume. So Volume/Full thickness = height

C) Then apply the COS for the inclined belt to the height, to get adjusted height. Since Decapping plate is not inclined, this will be slightly high.

The exterior shell is a 80mm homogeneous decapping plate from +2.65 to -3
452 = 5.65 * 80

The interior belt is inclined outwards at 20degrees and tapers
Starting at 330mm above water from +2.65m to -1m below waterline, then
From -1m to -3m it tapers to 230mm.

The Main Belt Math :
untapered portion
1204.5 = (2.65 to -1) x 330mm
tapered portion
460 = (-1 to -3) x 230mm
110 = (-1 to -3) x 1/2 x (330-230)

Subtotal
= 1774.5 main belt

Adjust for inclined = 1774.5/cos(20) = 1888.38
+452 for decapping plate
----
2340.38 plate volume

At a thickness of 80+330 = 410mm
This is a plate height of :
2340.38/410 = 5.708 = 5.71

2.65m to -3m : total 5.65

Decapping Volume : 2.65

The entire inner belt is outsloped

The Bulge goes to the bottom of the exterior plate.

TDS
The TDS rises to 0.2m above WL, sealing to the bottom of the splinter deck.
With the exterior bulge and interior room, it is 8m deep.

9mm bulge skin
1.5m Void bulge
Hull
1.5m Void
mild bulkhead
2m Fuel
mild bulkhead
2m Fuel
1x 20mm STS
2m Void
1x 30mm STS

The TDS rises behind the lower main belt, sealing to the bottom of the splinter deck. The TDS with its
hull material, and 1x19mm STS middle bulkhead and 2x19mm STS holding bulkhead is expected to be proof against splinters.

Further, the TDS system serves as a flooding barrier if the outer decapping plate or main belt are pierced or pushed in.

Decks
7.55 Forecastle deck
5.10 Weather Deck - unarmored
2.65 Battery Deck, 145mm Armor
0.20 Top Protective Splinter Deck, 40mm Armor, Top TDS.
-2.3 Bottom edge Splinter Deck
-3.0 Bottom Main Belt.
-5.5 1st platform dec
-8.2 Engineering
-9.2 Double Bottom
-9.5 K

Misc Wt
225t Reserve

453t FC 1930
25t LR Radio
0t SR Radio
10t Air SR Radio
25t Air Search Radar -Early Shipborne
25t Hulesmeyer station keeping
25t Night Fight tower
75t Admirals Quarters

OD
5t - Paravanes
100t - 4x Ftr/ scout float
10t - 2x CAT
20t - Hangers in stern
45t - Ext Fire Suppression

HAW
45t Ext Fire Suppression
45t Climate Control

HBW
100t - Combat information Center
215 tons Torpedo Nets
804 tons Turbo-Electric
45t Enhanced Pumps

60t -Aux Diesel-Electric plant. - Last 138nm of fuel is Diesel for this . sufficient for ~7knots