Scout Cruisers and Frigates

Kaiser Kirk · August 04, 2017, 10:37:47 PM

Artemisia, Parthian Armored Frigate laid down 1894

4 relegated to Training, Refurbished 1930
8 scrapped 1928.0

# in Class : 16
# Active : 4
# Lost : 4 IV (lost straits of Magellan), VI (MIA), VIII (Driven onto reef), XIII (coal fire->magazine explosion)

Quote
Displacement:
3,094 t light; 3,219 t standard; 3,337 t normal; 3,431 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(331.82 ft / 328.08 ft) x 42.65 ft x (13.12 / 13.44 ft)
(101.14 m / 100.00 m) x 13.00 m x (4.00 / 4.10 m)

Armament:
4 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 120 per gun
Quick firing guns in casemate mounts, 1912 Model
4 x Single mounts on side ends, evenly spread
4 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 200 per gun
Anti-air guns in deck mounts, 1929 Model
4 x Single mounts on sides, evenly spread
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 800 per gun
Anti-air guns in deck mounts, 1929 Model
2 x 2 row quad mounts on sides, aft deck centre
4 - 1.18" / 30.0 mm 80.0 cal guns - 0.95lbs / 0.43kg shells, 1,200 per gun
Anti-air guns in deck mounts, 1929 Model
2 x 2-gun mounts on sides, forward deck forward
Weight of broadside 688 lbs / 312 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.38" / 35 mm 236.22 ft / 72.00 m 12.01 ft / 3.66 m
Ends: 1.38" / 35 mm 91.83 ft / 27.99 m 12.01 ft / 3.66 m
Main Belt covers 111 % 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: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
2nd: 0.31" / 8 mm - -

- Protected deck - single deck:
For and Aft decks: 1.18" / 30 mm
Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 4,651 shp / 3,470 Kw = 16.85 kts
Range 4,000nm at 10.00 kts
Bunker at max displacement = 213 tons

Complement:
219 - 285

Cost:
£0.160 million / $0.639 million

Distribution of weights at normal displacement:
Armament: 116 tons, 3.5 %
- Guns: 116 tons, 3.5 %
Armour: 488 tons, 14.6 %
- Belts: 220 tons, 6.6 %
- Armament: 18 tons, 0.5 %
- Armour Deck: 233 tons, 7.0 %
- Conning Tower: 17 tons, 0.5 %
Machinery: 141 tons, 4.2 %
Hull, fittings & equipment: 1,057 tons, 31.7 %
Fuel, ammunition & stores: 243 tons, 7.3 %
Miscellaneous weights: 1,292 tons, 38.7 %
- Hull below water: 558 tons
- Hull void weights: 400 tons
- Hull above water: 206 tons
- On freeboard deck: 45 tons
- Above deck: 83 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,778 lbs / 3,982 Kg = 64.0 x 6.5 " / 165 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 2.6 ft / 0.8 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.94

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.636 / 0.639
Length to Beam Ratio: 7.69 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 38
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: 18.00 %, 17.59 ft / 5.36 m, 15.12 ft / 4.61 m
- Forward deck: 20.00 %, 15.12 ft / 4.61 m, 12.66 ft / 3.86 m
- Aft deck: 52.00 %, 12.66 ft / 3.86 m, 12.66 ft / 3.86 m
- Quarter deck: 10.00 %, 12.66 ft / 3.86 m, 14.30 ft / 4.36 m
- Average freeboard: 13.61 ft / 4.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 49.5 %
- Above water (accommodation/working, high = better): 119.7 %
Waterplane Area: 10,582 Square feet or 983 Square metres
Displacement factor (Displacement / loading): 141 %
Structure weight / hull surface area: 71 lbs/sq ft or 348 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.08
- Longitudinal: 1.72
- Overall: 1.13
Excellent machinery, storage, compartmentation space
Adequate 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

By 1928, the last of the Artesmia Sailing Frigates had been removed from frontline service,
and four were retained for training purposes.

The secondary and tertiary guns are converted to modern AA for training purposes,
as they are well aware sails would drastically effect sky arcs...

Named after Grand Admiral Artemisia, a famous admiral from 480BCE. She was known for leading her navy against the Greek City States.

These are the last of Parthia's sailing ships. Starting in the late 1860s there was an expansion of the fleet to establish a naval presence on the sea lanes of the Indian Ocean. In 1872 squadrons were assigned to Zanzibar and the Straits of Malacca. There they conducted anti-slavery work (East Africa) and trade protection. These were the survivors of the Byzantine-Parthian war, when Suez allowed the Byzantine fleet to concentrate and destroy the small Parthian. A preceding similar class, built in 1886, has been retired. The 1894 class was originally deployed on a global basis, with 'homeports' with the Atlantic and Bengal Expeditionary Fleets (Cape Verde, Malacca).

Converted in 1930 to 'Tall Ship' training vessels.

Armor :
The citadel is expanded fore/aft 12m (adjusted bow/stern %) to ensure critical systems fit below.

A protective deck, crowning at +1.42m and descending to -1.06m is fitted.
The deck has a 30mm crown, and 65mm slopes the entire length of the ship.

Misc Wt.

0t - Reserve

AD
12t - FC
12t - NF gear
45t - Sails
25t - LR radio
0t - SR Radio

OD
5t - Paravanes
40t - 2x 10t Motor Launch

HAW
3t - 2x CO2 Compressor AC
100t - Berthing
100t - Extra Supplies

HBW
400t - Berthing
100t - Extra stores
200t - Masts
32t - 2 Bow Torpedoes, 8x 21" 4t Torps, below protective deck
69t - Diesel
57t - Turbogenerators

Decks :
+3.86
+1.42
-1.02
-3.82

With a full rig, this vessel could do 12. knots at a cost 45 above deck, 195 below deck

This vessel is full rigged
The Persians believed the full rigging, the modest bunker (195t) and small size / draft means the vessel can have nearly unlimited range, calling on any anchorage world wide. All while not belching a cloud of coal smoke on the horizon. This series of raiders were full rigged sailing vessels. An anachronism in many ways, the purpose wass to allow these raiders to operate around the world, threatening enemy mercantile traffic everywhere. The opposition is not expected to field substantive forces, but the combination of guns did make this vessel capable of combating most light cruisers of the time successfully. As the 1900s ground on, this role became obsolescent, and then obsolete. While most were scrapped, 4 were chosen for conversion to sailing training ships.

Quote"half hull speed = 5% normal displacement weight, every additional knot = +1% normal displacement weight, every additional knot above hull speed = +2% normal displacement weight"
This is the alternate means of calculating sailing rig.
With a normal of 3,337 a 1/2 hull speed (9.065kts) costs : 166.85t
For every additional +1 knot the cost is 33.37t
10kts : 200.22
11kts : 233.59
12kts : 266.96
13kts : 300.33
Split 2/3 below, 1/3 above

[/quote]

Artemisia, Parthian Armored Frigate refurb 1915 laid down 1894

Displacement:
3,005 t light; 3,132 t standard; 3,337 t normal; 3,501 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(331.82 ft / 328.08 ft) x 42.65 ft x (13.12 / 13.67 ft)
(101.14 m / 100.00 m) x 13.00 m x (4.00 / 4.17 m)

Armament:
4 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 120 per gun
     Quick firing guns in casemate mounts, 1912 Model
     4 x Single mounts on side ends, evenly spread
8 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 210 per gun
Quick firing guns in deck mounts, 1899 Model
4 x Single mounts on sides, forward evenly spread
4 x Single mounts on sides, aft evenly spread
8 - 0.59" / 15.0 mm 74.0 cal guns - 0.11lbs / 0.05kg shells, 2,500 per gun
Machine guns in deck mounts, 1886 Model
4 x Twin mounts on side ends, evenly spread
4 raised mounts
Weight of broadside 750 lbs / 340 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.38" / 35 mm 236.22 ft / 72.00 m 12.01 ft / 3.66 m
Ends: 1.38" / 35 mm 91.83 ft / 27.99 m 12.01 ft / 3.66 m
Main Belt covers 111 % of normal length

Belts represent additional armor on slopes of protective deck

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
2nd: 0.98" / 25 mm - -

- Protected deck - single deck:
For and Aft decks: 1.18" / 30 mm
Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

The deck has a 30mm crown, and 65mm slopes the entire length of the ship.

- Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 4,651 ihp / 3,470 Kw = 16.85 kts
Range 4,000nm at 8.00 kts
Bunker at max displacement = 369 tons (100% coal)

Complement:
219 - 285

Cost:
£0.260 million / $1.040 million

Distribution of weights at normal displacement:
Armament: 109 tons, 3.3 %
- Guns: 109 tons, 3.3 %
Armour: 505 tons, 15.1 %
- Belts: 220 tons, 6.6 %
- Armament: 35 tons, 1.0 %
- Armour Deck: 233 tons, 7.0 %
- Conning Tower: 17 tons, 0.5 %
Machinery: 869 tons, 26.1 %
Hull, fittings & equipment: 960 tons, 28.8 %
Fuel, ammunition & stores: 332 tons, 9.9 %
Miscellaneous weights: 562 tons, 16.8 %
- Hull below water: 230 tons
- Hull above water: 140 tons
- On freeboard deck: 55 tons
- Above deck: 137 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,667 lbs / 1,663 Kg = 26.8 x 6.5 " / 165 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 2.3 ft / 0.7 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 98 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.97

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.636 / 0.641
Length to Beam Ratio: 7.69 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 18.00 %, 17.59 ft / 5.36 m, 15.12 ft / 4.61 m
- Forward deck: 20.00 %, 15.12 ft / 4.61 m, 12.66 ft / 3.86 m
- Aft deck: 52.00 %, 12.66 ft / 3.86 m, 12.66 ft / 3.86 m
- Quarter deck: 10.00 %, 12.66 ft / 3.86 m, 14.30 ft / 4.36 m
- Average freeboard: 13.61 ft / 4.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 107.0 %
- Above water (accommodation/working, high = better): 119.7 %
Waterplane Area: 10,582 Square feet or 983 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 65 lbs/sq ft or 315 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.56
- Overall: 1.01
Adequate machinery, storage, compartmentation space
Adequate 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

Named after Grand Admiral Artemisia, a famous admiral from 480BCE. She was known for leading her navy against the Greek City States.

With a full rig, this vessel could do 12. knots at a cost 45 above deck, 195 below deck

This vessel is full rigged
The Persians believe the full rigging, the modest bunker (195t) and small size / draft means the vessel can have nearly unlimited range, calling on any anchorage world wide. All while not belching a cloud of coal smoke on the horizon. An anachronism in many ways, the purpose is to allow raiders to operate around the world, threatening enemy mercantile traffic everywhere.

Now relegated to training roles, focusing on basic skills and midshipman's cruise.

Miscellaneous Weight :
Reserve : 6t

AD
25t : Long Range radio, refitted 1915.
45t : Sails
11t : Fire Control 1918

OD
5t Paravanes
40t : 2 x 10t motor launch

HAW
3t : CO2 compressor AC
50t : quarters for Marine Section : 25 men
60t : Extra supplies
30t : Brig for prisoners

HBW
200t : Masts
30t : 2 bow torpedo tubes, 20 16" torpedoes, sited below protective deck

Decks :
+3.86
+1.42
-1.02
-3.82

[/quote]

1904 refit : 57t
+25 Long range radio
-8 x 90L40 BL
+32t +8 x 90L45 QF

1907 refit :12t
+1905 fire control
-10t construction resv

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

1915 Refurbishment
- Change 180L40 to 165L43
Replace LR Radio and Fire Control

Class was refurbished in 1915 to the following standard (original stats follow in grey)

Class Name : FFA Artesmia 1915 Refurbishment
Goal : To extend service life to 1925. Simple refurbishment, replace 180mm with 165mm, new Fire Control, new LR radio, new masts

Date : 1894
Original Cost : 2998
Replace 180BL with 165QF, splinter armor : 93t
Total Mag : 38t : 120 rounds
1904 LR Radio : 25t
1914 Fire Control : 12t

COST: $0.86, 0.13BP

1922 Basic Refit
Fire Control updated to 1918

Original Version

Displacement:
   2,998 t light; 3,132 t standard; 3,337 t normal; 3,501 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (331.82 ft / 328.08 ft) x 42.65 ft x (13.12 / 13.67 ft)
   (101.14 m / 100.00 m) x 13.00 m x (4.00 / 4.17 m)

Armament:
4 - 7.09" / 180 mm 40.0 cal guns - 170.54lbs / 77.36kg shells, 120 per gun
     Breech loading guns in casemate mounts, 1899 Model
     4 x Single mounts on side ends, evenly spread
8 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 210 per gun
     Quick firing guns in deck mounts, 1899 Model
     4 x Single mounts on sides, forward evenly spread
     4 x Single mounts on sides, aft deck centre
8 - 0.59" / 15.0 mm 74.0 cal guns - 0.11lbs / 0.05kg shells, 2,500 per gun
     Machine guns in deck mounts, 1886 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 859 lbs / 390 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.38" / 35 mm   236.22 ft / 72.00 m   12.01 ft / 3.66 m
   Ends:   1.38" / 35 mm     91.83 ft / 27.99 m   12.01 ft / 3.66 m
     Main Belt covers 111 % of normal length

35mm "belt" represents added armor on slope of protective deck, for 65mm total.

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm     -           -
   2nd:   0.98" / 25 mm     -           -

- Protected deck - single deck: 1.18" / 30 mm For and Aft decks
   Forecastle: 1.18" / 30 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm
Full Rigged Vessel : Sailing speed 12kts

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 4,651 ihp / 3,470 Kw = 16.85 kts
   Range 4,000nm at 8.00 kts
   Bunker at max displacement = 369 tons (100% coal)

Complement:
   219 - 285

Cost:
   £0.264 million / $1.057 million

Distribution of weights at normal displacement:
   Armament: 122 tons, 3.7 %
   Armour: 496 tons, 14.9 %
     - Belts: 220 tons, 6.6 %
     - Armament: 26 tons, 0.8 %
     - Armour Deck: 233 tons, 7.0 %
     - Conning Tower: 17 tons, 0.5 %
   Machinery: 869 tons, 26.1 %
   Hull, fittings & equipment: 948 tons, 28.4 %
   Fuel, ammunition & stores: 339 tons, 10.2 %
   Miscellaneous weights: 562 tons, 16.8 %
     - Hull below water: 230 tons
     - Hull above water: 140 tons
     - On freeboard deck: 55 tons
     - Above deck: 137 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,575 lbs / 1,621 Kg = 20.1 x 7.1 " / 180 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 98 %
         - Recoil effect (Restricted arc if above 1.00): 0.34
   Seaboat quality (Average = 1.00): 1.97

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.636 / 0.641
   Length to Beam Ratio: 7.69 : 1
   'Natural speed' for length: 18.11 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:   18.00 %, 17.59 ft / 5.36 m, 15.12 ft / 4.61 m
     - Forward deck:   20.00 %, 15.12 ft / 4.61 m, 12.66 ft / 3.86 m
     - Aft deck:   52.00 %, 12.66 ft / 3.86 m, 12.66 ft / 3.86 m
     - Quarter deck:   10.00 %, 12.66 ft / 3.86 m, 14.30 ft / 4.36 m
     - Average freeboard:      13.61 ft / 4.15 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.3 %
      - Above water (accommodation/working, high = better): 119.7 %
   Waterplane Area: 10,582 Square feet or 983 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.55
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   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 four heavy 180mm main guns mounted in casements allow both fore/aft fire, and 2 gun broadside fire. This in combo with the 4-gun batteries of 90mm guns gives it the ability to fight off the typical light cruisers of the world.

Armor :
The citadel is expanded fore/aft 12m (adjusted bow/stern %) to ensure critical systems fit below.

Miscellaneous Weight :
200 below : Masts
30 below : 2 bow torpedo tubes, 20 16" torpedoes, sited below protective deck
(225)
50 in hull : quarters for Marine Section : 25 men
60 in hull : Extra supplies
30 in hull : Brig for prisoners
(140)
40 on deck : 2 x 10t motor launch
15 on deck : Extra ventilation
(55)
25 Above deck : Long Range radio, refitted 1904.
45 Above deck : Sails
(60)
Void : 10t excess

1904 refit : 57t
+25 Long range radio
-8 x 90L40 BL
+32t +8 x 90L45 QF

1907 refit :12t
+1905 fire control
-10t construction resv

Kaiser Kirk · August 04, 2017, 10:42:56 PM

Scrapped 1920
Ninlil, Parthian Scout Cruiser, laid down 1894

Kaiser Kirk · August 12, 2017, 08:10:00 PM

Scythian, Parthian Scout Cruiser laid down 1899
Refurbished 1920. Basic Refit 1922

SC - 3
SC - 4

Quote
Parthian Scout Cruiser laid down 1899 (Engine 1920)

Displacement:
2,982 t light; 3,138 t standard; 3,882 t normal; 4,477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.94 ft)
(119.93 m / 118.00 m) x 12.50 m x (4.60 / 5.16 m)

Armament:
8 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
Quick firing guns in deck mounts, 1913 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 x Single mounts on side ends, evenly spread
4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
Quick firing guns in casemate mounts, 1913 Model
4 x Single mounts on sides, forward evenly spread
4 hull mounts in casemates- Limited use in heavy seas
2 - 3.54" / 90.0 mm 50.0 cal guns - 23.55lbs / 10.68kg shells, 350 per gun
Anti-air guns in deck mounts, 1911 Model
2 x Single mounts on sides amidships
2 raised mounts
Weight of broadside 709 lbs / 321 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.24" / 6 mm - -
3rd: 0.24" / 6 mm - -

- Box over magazines:
0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 3 shafts, 18,186 shp / 13,567 Kw = 24.00 kts
Range 7,800nm at 16.00 kts
Bunker at max displacement = 1,339 tons

Complement:
245 - 319

Cost:
£0.224 million / $0.897 million

Distribution of weights at normal displacement:
Armament: 113 tons, 2.9 %
- Guns: 113 tons, 2.9 %
Armour: 20 tons, 0.5 %
- Armament: 5 tons, 0.1 %
- Armour Deck: 15 tons, 0.4 %
Machinery: 636 tons, 16.4 %
Hull, fittings & equipment: 1,644 tons, 42.3 %
Fuel, ammunition & stores: 899 tons, 23.2 %
Miscellaneous weights: 569 tons, 14.7 %
- Hull below water: 334 tons
- Hull above water: 38 tons
- On freeboard deck: 135 tons
- Above deck: 62 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,623 lbs / 3,004 Kg = 125.6 x 4.7 " / 120 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.8 ft / 0.5 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 83 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.67

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.567 / 0.583
Length to Beam Ratio: 9.44 : 1
'Natural speed' for length: 19.68 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 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 %, 23.62 ft / 7.20 m, 21.65 ft / 6.60 m
- Forward deck: 30.00 %, 21.65 ft / 6.60 m, 19.69 ft / 6.00 m
- Aft deck: 35.00 %, 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: 16.43 ft / 5.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.2 %
- Above water (accommodation/working, high = better): 137.6 %
Waterplane Area: 11,258 Square feet or 1,046 Square metres
Displacement factor (Displacement / loading): 180 %
Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.25
- Longitudinal: 3.02
- Overall: 1.36
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

Completed in 1899, the Scythian class became rapidly outdated as engine tech changed.

Part of the Early stacked casement forward armament, they were completed with a high forecastle to keep the forward casements dry.

The Parthians view this as an opportunity to try a small hull 'sentry ship' design. This will serve as a picket for the Battleline, and given +4knots to allow positioning.
Batteries, like on a submarine, will be fitted to allow silent 'creep'.

The ship will be given depth charges and ASW sensors to evaluate the ability of larger vessels such as this to engage in ASW work

Armament will be revised to allow engagement of charging torpedo craft, but against cruisers the ship will remain behind friendly cruisers.

While consideration was given to outfitting as a Sub tender, it was decided not to blur the roles.

Miscellaneous Weight :
30t - Void

12t FC - 1918
25t LR Radio
25t Searchlight tower

25t Kite Balloon
25t Hulesmeyer device
25t War Tuba
60t Depth Charges 1915

25t Enhanced Fire Suppression
3t CO2 Air Compressors

120t Torpedo nets
25t Additional pumps
159t Turbogenerator
15t Enhanced Hydrophones
15t Batteries

The old
Old Engine is 1644t Complex
Old Bunker is 1367t Oil/Coal
Old armor is 'box over magazines' at 15tons.

A) Original Cost $2.999

B) Engines and Armanent
New Turbo-Electric engines 100% oil : 636t
90mm replaced with 120mm
45mm replaced with 90AA
Total gun+mount: 113t

C) Armor and Functional Misc Wt
Turbogenerators : 159t
Gun Spray Shield : 5t
Magazine box unchanged, still 15t
Functional Misc Wt : 569t

D)Hull fittings & equip :
Unchanged

E) Fuel, Ammunition
Fuel : 1339t ~23days at cruising spd
Mag : 78t

Displacement:
   2,996 t light; 3,122 t standard; 3,882 t normal; 4,489 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.98 ft)
   (119.93 m / 118.00 m) x 12.50 m x (4.60 / 5.18 m)

Armament:
8 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 300 per gun
     Quick firing guns in deck mounts, 1899 Model
     2 x Single mounts on centreline ends, evenly spread
     6 x Single mounts on sides amidships
4 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1899 Model
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
8 - 1.77" / 45.0 mm 45.0 cal guns - 2.87lbs / 1.30kg shells, 350 per gun
     Quick firing guns in deck mounts, 1899 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
Weight of broadside 288 lbs / 130 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm     -           -
   3rd:   0.24" / 6 mm     -           -

- Box over magazines: 0.98" / 25 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 3 shafts, 10,463 ihp / 7,805 Kw = 20.85 kts
   Range 6,653nm at 12.00 kts
   Bunker at max displacement = 1,367 tons (90% coal)

Complement:
   245 - 319

Cost:
   £0.350 million / $1.398 million

Distribution of weights at normal displacement:
   Armament: 54 tons, 1.4 %
   Armour: 24 tons, 0.6 %
     - Armament: 9 tons, 0.2 %
     - Armour Deck: 15 tons, 0.4 %
   Machinery: 1,644 tons, 42.4 %
   Hull, fittings & equipment: 1,152 tons, 29.7 %
   Fuel, ammunition & stores: 886 tons, 22.8 %
   Miscellaneous weights: 121 tons, 3.1 %
     - Hull below water: 40 tons
     - Hull void weights: 35 tons
     - On freeboard deck: 15 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,708 lbs / 1,228 Kg = 121.7 x 3.5 " / 90 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.53
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.567 / 0.583
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 19.68 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: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 23.62 ft / 7.20 m, 21.65 ft / 6.60 m
     - Forward deck:   30.00 %, 21.65 ft / 6.60 m, 19.69 ft / 6.00 m
     - Aft deck:   35.00 %, 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:      16.43 ft / 5.01 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 142.8 %
      - Above water (accommodation/working, high = better): 137.6 %
   Waterplane Area: 11,258 Square feet or 1,046 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 59 lbs/sq ft or 286 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.09
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   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

Miscellaneous Weight :
40t : Torpedo flats, 20x 18" Torpedo, 2 tubes bow w/ 6 torp, 1 flat amidships with 2 tubes each beam w/14 torps
15t : "Windcatcher" evaporative cooling.
6t : 1905 Fire control, refitted 1907
25t : Long range wireless, refitted 1904

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

1920 Refurbishment

1922 Basic Fleet Refit - FC

Kaiser Kirk · August 12, 2017, 08:20:27 PM

Scrapped 1928.0
"Ostrich" *, Parthian 3rd Class Minelaying Cruiser laid down 1899
ML-I, II

Kaiser Kirk · August 12, 2017, 10:31:14 PM

1902 "Samaritian" , laid down 1902, Refurbished 1920
Basic Refit 1922

SC-5

Quote
1902 Samaritan, Parthian Scout Cruiser laid down 1902 (Engine 1920)

Displacement:
2,982 t light; 3,138 t standard; 3,882 t normal; 4,477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.94 ft)
(119.93 m / 118.00 m) x 12.50 m x (4.60 / 5.16 m)

Armament:
8 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
Quick firing guns in deck mounts, 1913 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 x Single mounts on side ends, evenly spread
4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
Quick firing guns in casemate mounts, 1913 Model
4 x Single mounts on sides, forward evenly spread
4 hull mounts in casemates- Limited use in heavy seas
2 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 350 per gun
Quick firing guns in deck mounts, 1911 Model
2 x Single mounts on sides amidships
2 raised mounts
Weight of broadside 710 lbs / 322 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.24" / 6 mm - -
3rd: 0.24" / 6 mm - -

- Box over magazines:
0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 18,186 shp / 13,567 Kw = 24.00 kts
Range 7,800nm at 16.00 kts
Bunker at max displacement = 1,339 tons

Complement:
245 - 319

Cost:
£0.224 million / $0.897 million

Distribution of weights at normal displacement:
Armament: 113 tons, 2.9 %
- Guns: 113 tons, 2.9 %
Armour: 23 tons, 0.6 %
- Armament: 6 tons, 0.1 %
- Armour Deck: 18 tons, 0.5 %
Machinery: 636 tons, 16.4 %
Hull, fittings & equipment: 1,611 tons, 41.5 %
Fuel, ammunition & stores: 900 tons, 23.2 %
Miscellaneous weights: 599 tons, 15.4 %
- Hull below water: 334 tons
- Hull void weights: 30 tons
- Hull above water: 38 tons
- On freeboard deck: 135 tons
- Above deck: 62 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,646 lbs / 3,015 Kg = 126.1 x 4.7 " / 120 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.8 ft / 0.5 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 84 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.67

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.567 / 0.583
Length to Beam Ratio: 9.44 : 1
'Natural speed' for length: 19.68 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 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 %, 23.62 ft / 7.20 m, 21.65 ft / 6.60 m
- Forward deck: 30.00 %, 21.65 ft / 6.60 m, 19.69 ft / 6.00 m
- Aft deck: 35.00 %, 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: 16.43 ft / 5.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.2 %
- Above water (accommodation/working, high = better): 137.6 %
Waterplane Area: 11,258 Square feet or 1,046 Square metres
Displacement factor (Displacement / loading): 177 %
Structure weight / hull surface area: 83 lbs/sq ft or 406 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.24
- Longitudinal: 2.99
- Overall: 1.35
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

The 1902 SC-5 Samaritan Class is a repeat of the 1899 SC-3 class,
but served as the Turbine testbed.

Unlike the 1899 class, turbo-electric drive is not needed.
But silent running on Batteries has some appeal still.

For one thing, if you're trying to use enhanced hydrophones to "hear" screws over the horizon, being able to shut down and creep on electrics is a distinct advantage.

Misc Wt -
30t Void

AD
12t FC - 1918
25t LR Radio
25t Searchlight tower

OD
25t Kite Balloon
25t Hulesmeyer Device
25t War Tuba
60t Depth Charges 1915

HAW
25t Enhanced Fire Suppression
3t CO2 Air Compressors

HBW
120t Torpedo Nets
25t Additional Pumps
159t Turbogenerator
15t Hydrophone
15t Batteries.

Parthian Scout Cruiser laid down 1902 (Engine 1902)
Displacement:
   3,000 t light; 3,126 t standard; 3,882 t normal; 4,486 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.97 ft)
   (119.93 m / 118.00 m) x 12.50 m x (4.60 / 5.17 m)

Armament:
8 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 300 per gun
     Quick firing guns in deck mounts, 1899 Model
     2 x Single mounts on centreline ends, evenly spread
     6 x Single mounts on sides amidships
4 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1899 Model
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
8 - 1.77" / 45.0 mm 45.0 cal guns - 2.87lbs / 1.30kg shells, 350 per gun
     Quick firing guns in deck mounts, 1899 Model
     8 x Single mounts on sides amidships
      8 raised mounts
Weight of broadside 288 lbs / 130 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm     -           -
   3rd:   0.24" / 6 mm     -           -

- Box over magazines: 0.98" / 25 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 10,755 shp / 8,024 Kw = 21.00 kts
   Range 7,060nm at 10.00 kts
   Bunker at max displacement = 1,360 tons (90% coal)

Complement:
   245 - 319

Cost:
   £0.368 million / $1.472 million

Distribution of weights at normal displacement:
   Armament: 54 tons, 1.4 %
   Armour: 24 tons, 0.6 %
     - Armament: 9 tons, 0.2 %
     - Armour Deck: 15 tons, 0.4 %
   Machinery: 1,775 tons, 45.7 %
   Hull, fittings & equipment: 1,037 tons, 26.7 %
   Fuel, ammunition & stores: 881 tons, 22.7 %
   Miscellaneous weights: 110 tons, 2.8 %
     - Hull below water: 40 tons
     - Hull void weights: 24 tons
     - On freeboard deck: 15 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,162 lbs / 981 Kg = 97.2 x 3.5 " / 90 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.60
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 10.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.567 / 0.583
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 19.68 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: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 23.62 ft / 7.20 m, 21.65 ft / 6.60 m
     - Forward deck:   30.00 %, 21.65 ft / 6.60 m, 19.69 ft / 6.00 m
     - Aft deck:   35.00 %, 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:      16.43 ft / 5.01 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 153.5 %
      - Above water (accommodation/working, high = better): 137.6 %
   Waterplane Area: 11,258 Square feet or 1,046 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 53 lbs/sq ft or 258 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.89
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   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

Miscellaneous Weight :
40t : Torpedo flats, 20x 18" Torpedo, 2 tubes bow w/ 6 torp, 1 flat amidships with 2 tubes each beam w/14 torps
15t : "Windcatcher" evaporative cooling.
6t : 1905 Fire control, refitted
25t : Long range wireless, refitted

The first major Parthian warship with turbines, the small cruiser would allow some service testing and evaluation prior to completion of other vessels. By this means, trained engineers and standard practices were developed.

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

1920 : Refurbishment as Sentry

Old :
Engine : 1775
Bunker : 1360
Box over mag : 15t

Costs : Exactly the same.
1922 : upgrade FC to 1918

Kaiser Kirk · November 10, 2018, 09:24:24 PM

"Rudaba" , Parthian Destroyer Leader Cruiser laid down 1910
Basic Refit 1922.

DDL - 1
DDL - 2
DDL - 3

The first two were built 1910, the third, to the same pattern, 1912.
Functionally, they can repair or reload a destroyer, or serve a gaggle of Torpedo boats.

Quote
Rudaba, Parthian Destroyer Leader Cruiser laid down 1910

Displacement:
   3,000 t light; 3,136 t standard; 3,604 t normal; 3,979 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (392.57 ft / 383.86 ft) x 45.11 ft x (17.06 / 18.27 ft)
   (119.65 m / 117.00 m) x 13.75 m x (5.20 / 5.57 m)

Armament:
4 - 4.72" / 120 mm 45.0 cal guns - 52.91lbs / 24.00kg shells, 200 per gun
     Quick firing guns in deck mounts, 1899 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
4 - 4.72" / 120 mm 45.0 cal guns - 52.91lbs / 24.00kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1899 Model
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
4 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1899 Model
     4 x Single mounts on side ends, evenly spread
Weight of broadside 511 lbs / 232 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.18" / 30 mm   326.28 ft / 99.45 m   12.01 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 131 % 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:   0.24" / 6 mm     -           -
   2nd:   0.24" / 6 mm     -           -

- Protected deck - single deck: 0.98" / 25 mm For and Aft decks
   Forecastle: 0.79" / 20 mm Quarter deck: 0.79" / 20 mm

- Conning towers: Forward 0.79" / 20 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 31,455 shp / 23,466 Kw = 28.10 kts
   Range 6,775nm at 12.00 kts
   Bunker at max displacement = 843 tons

Complement:
   232 - 302

Cost:
   £0.312 million / $1.247 million

Distribution of weights at normal displacement:
   Armament: 91 tons, 2.5 %
   Armour: 388 tons, 10.8 %
     - Belts: 182 tons, 5.1 %
     - Armament: 4 tons, 0.1 %
     - Armour Deck: 197 tons, 5.5 %
     - Conning Tower: 4 tons, 0.1 %
   Machinery: 1,300 tons, 36.1 %
   Hull, fittings & equipment: 1,019 tons, 28.3 %
   Fuel, ammunition & stores: 604 tons, 16.8 %
   Miscellaneous weights: 203 tons, 5.6 %
     - Hull below water: 56 tons
     - Hull void weights: 15 tons
     - Hull above water: 60 tons
     - On freeboard deck: 39 tons
     - Above deck: 33 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,477 lbs / 1,123 Kg = 47.0 x 4.7 " / 120 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.427 / 0.440
   Length to Beam Ratio: 8.51 : 1
   'Natural speed' for length: 19.59 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 22.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   10.00 %, 21.56 ft / 6.57 m, 19.16 ft / 5.84 m
     - Forward deck:   30.00 %, 19.16 ft / 5.84 m, 19.16 ft / 5.84 m
     - Aft deck:   55.00 %, 10.96 ft / 3.34 m, 10.96 ft / 3.34 m
     - Quarter deck:   5.00 %, 10.96 ft / 3.34 m, 10.96 ft / 3.34 m
     - Average freeboard:      14.33 ft / 4.37 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 128.1 %
      - Above water (accommodation/working, high = better): 123.4 %
   Waterplane Area: 10,850 Square feet or 1,008 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.71
      - Overall: 0.90
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform

Designed as a cruiser destroyer leader to accompany the fleet.

The 4 'cheek' casement guns in the raised forecastle bring forward fire up to 6 x 120mm,
and a broadside also fo 6 guns.

Laid down in 1910, the 90mm AA mount is not available, so the 90L45 QF in the Mk IV mounting is used.

Only splinter armor is fitted, to keep HE shells from penetrating to the vitals or taking out the bridge. The magazines and machinery barely fit under the protected deck.
The guns have only spray sheilds.
The protected deck is 20mm on the flat and 50mm on the slopes

Range is 21 days at 12knots with a 10% reserve
This is a week more than the vessel is expected to need, but the extra fuel is to allow an emergency reserve for her associated Destroyers.

Weaponry :
1899 120L45 QF in Mk IV mount & Mk III Casement
1899 90L45 QF in Mk IV mount

Misc. Weight :
8t - 1910 Fire Control
25t - Long Range Radio
15t - "Windcatcher" evaporative cooling
24t - 4x sets of deck torpedoes.
60t- 600 tons TB/Destroyer tender ability
56t - extra torpedoes ..safely below the armored deck.

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

Basic Refit 1922 :
Improve FC to 1918

Kaiser Kirk · February 14, 2021, 06:19:42 PM

"Royal Road" , Parthian Royal Mail Cruiser laid down 1911
Basic refit 1922
Refurbished 1930

RMC - 1 : Royal Yacht
RMC - 2 : Training Cruiser

The 1930 Refurbishment split this class into two types - A Royal Yacht and a Training Cruiser.

Laid down in 1911 and intended to place one on the Parthia-Hawaii-Kalifern route, and one on the Parthia - Ria route
They carried higher priority cargo and personages than the standard mail service. By 1930 the combination of undersea cables and both cargo-liners and liners with respectable speeds rendered the need for this task obsolescent.

Quote
Royal Road R30, Training Cruiser & Royal Yacht
see misc weight for separate listings

Cruiser laid down 1911 (Engine 1930)

Displacement:
3,873 t light; 4,069 t standard; 5,059 t normal; 5,851 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(492.13 ft / 485.56 ft) x 44.82 ft x (16.27 / 18.18 ft)
(150.00 m / 148.00 m) x 13.66 m x (4.96 / 5.54 m)

Armament:
4 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 146 per gun
Dual purpose guns in deck mounts, 1915 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
8 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 250 per gun
Anti-air guns in deck mounts, 1929 Model
4 x 2-gun mounts on side ends, evenly spread
16 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,000 per gun
Machine guns in deck mounts, 1929 Model
2 x 2 row quad mounts on sides amidships
2 raised mounts
2 x 2 row quad mounts on sides forward
2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 1,500 per gun
Anti-air guns in deck mounts, 1929 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 802 lbs / 364 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.36" / 60 mm 315.62 ft / 96.20 m 12.01 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 100 % 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: 0.98" / 25 mm 0.31" / 8 mm -
2nd: 0.31" / 8 mm - -
3rd: 0.31" / 8 mm - -
4th: 0.31" / 8 mm - -

- Protected deck - single deck:
For and Aft decks: 1.18" / 30 mm
Forecastle: 0.79" / 20 mm Quarter deck: 0.79" / 20 mm

- Conning towers: Forward 2.56" / 65 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 25,947 shp / 19,356 Kw = 26.00 kts
Range 4,527nm at 22.00 kts
Bunker at max displacement = 1,782 tons

Complement:
299 - 389

Cost:
£0.285 million / $1.141 million

Distribution of weights at normal displacement:
Armament: 150 tons, 3.0 %
- Guns: 150 tons, 3.0 %
Armour: 697 tons, 13.8 %
- Belts: 363 tons, 7.2 %
- Armament: 18 tons, 0.4 %
- Armour Deck: 300 tons, 5.9 %
- Conning Tower: 16 tons, 0.3 %
Machinery: 786 tons, 15.5 %
Hull, fittings & equipment: 1,495 tons, 29.6 %
Fuel, ammunition & stores: 1,186 tons, 23.4 %
Miscellaneous weights: 745 tons, 14.7 %
- Hull below water: 321 tons
- Hull void weights: 5 tons
- Hull above water: 104 tons
- On freeboard deck: 225 tons
- Above deck: 90 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,401 lbs / 3,811 Kg = 61.3 x 6.5 " / 165 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 2.1 ft / 0.6 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 82 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.78

Hull form characteristics:
Hull has raised forecastle,
a ram bow and a round stern
Block coefficient (normal/deep): 0.500 / 0.517
Length to Beam Ratio: 10.83 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 46
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 %, 20.67 ft / 6.30 m, 18.21 ft / 5.55 m
- Forward deck: 32.00 %, 18.04 ft / 5.50 m, 15.75 ft / 4.80 m
- Aft deck: 33.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Quarter deck: 15.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Average freeboard: 16.80 ft / 5.12 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 69.0 %
- Above water (accommodation/working, high = better): 150.7 %
Waterplane Area: 14,499 Square feet or 1,347 Square metres
Displacement factor (Displacement / loading): 149 %
Structure weight / hull surface area: 63 lbs/sq ft or 306 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 1.40
- Overall: 0.90
Caution: Hull subject to strain in open-sea
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

Royal Road - Yacht
Royal Mail - Training Cruiser

With undersea cables well established, and regular shipping routes, the need for the specialized courier cruisers has deminished.

Completed in 1913, the time to refurbish or scrap will be soon (1933).
The decision has been made to explore extending their life and convert them to an official yacht and a training cruiser.

Turbo-Electric drive is used as it is the smoothest and provides large amounts of electicity for any needs.
Steam was chosen as it is more common in the fleet, and so better for engineers to train on.
Further fuel oil is a more commonly available fuel than Diesel at this time. Plus it means the old bunkers can be refurbish but unaltered.

Oil fired turbines
Original Engine : 1312
Original Bunker : 1799
Mag : 46

Replace Engine : 786
Replace Guns : 143
Subtotal =$1.858, 0.929 BP

Replace gun shields : 18
Func Misc Wt : 745-455 = 290
Subtotal = 0.308, 0.308

Flare bow (alter hull) 1743/5000 = $0.3486

Replace Fuel : unchanged
Magazines : 95
Non-Funct wt : 455
Subtotal : 0.550 = $0.275

Base : 3.799* 0.2 = $ 0.7598

Total $ : 3.5494
Total BP : 1.237

New Misc Weight

25t - Reserve

AD
15t - FC
25t - LR Radio
0t - SR Radio
25t - Hulesmeyer Prox Detector
15t - Night Fighting Gear

yacht
10t - Gilding, scrollwork, fancy-schmancy stuff

Trainging
10t- SR Radio for AC control

OD :
5t - Paravane
80t - 2 x 20t Cabin Cruisers (Not MTBs)

Yacht
40t On deck Convertible Ballroom/Tennis Court/Swimmining pool.
100t VIP Cabins

Training
40t - Instructor Quarters
100t - Classrooms and workshops

HAW
4t CO2 Compressor AC
4t Add Fire Suppresion

Yacht
100t VIP Accomodations

Trainng
100t Cadet Berthing

HBW
4tt Add Pumps
197t Turbogenerators
20t - Aux Diesel Generators 500kw

Yacht
100t Service Crew Accomodations.

Training
40t - Training materials,Rooms
60t - Cadet Berthing

Knots Range Range
26 2,841 4.6 days
22 5,204 9.9 days
18 7,600 17.6 days
14 13,768 40.9 days
12 19,340 67.1 days
10 28,390 118.3 days

(using the T-E range bonus as the reserve)

Royal Road, Parthia Royal Mail Cruiser laid down 1911

Displacement:
3,799 t light; 3,954 t standard; 4,757 t normal; 5,399 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(492.13 ft / 485.56 ft) x 44.82 ft x (14.76 / 16.29 ft)
(150.00 m / 148.00 m) x 13.66 m x (4.50 / 4.96 m)

Armament:
4 - 6.50" / 165 mm 45.0 cal guns - 138.23lbs / 62.70kg shells, 150 per gun
Quick firing guns in deck mounts, 1911 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 - 3.54" / 90.0 mm 50.0 cal guns - 23.55lbs / 10.68kg shells, 250 per gun
Anti-air guns in deck mounts, 1911 Model
4 x Single mounts on sides amidships
8 - 0.45" / 11.4 mm 45.0 cal guns - 0.04lbs / 0.02kg shells, 5,000 per gun
Machine guns in deck mounts, 1879 Model
4 x Single mounts on sides forward
4 double raised mounts
Weight of broadside 647 lbs / 294 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.36" / 60 mm 315.62 ft / 96.20 m 12.01 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -

- Protected deck - single deck: 1.18" / 30 mm For and Aft decks
Forecastle: 0.79" / 20 mm Quarter deck: 0.79" / 20 mm

- Conning towers: Forward 2.56" / 65 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 31,396 shp / 23,421 Kw = 27.50 kts
Range 2,235nm at 22.50 kts
Bunker at max displacement = 1,445 tons

Complement:
286 - 372

Cost:
£0.343 million / $1.371 million

Distribution of weights at normal displacement:
Armament: 113 tons, 2.4 %
Armour: 701 tons, 14.7 %
- Belts: 365 tons, 7.7 %
- Armament: 16 tons, 0.3 %
- Armour Deck: 305 tons, 6.4 %
- Conning Tower: 16 tons, 0.3 %
Machinery: 1,274 tons, 26.8 %
Hull, fittings & equipment: 1,457 tons, 30.6 %
Fuel, ammunition & stores: 958 tons, 20.1 %
Miscellaneous weights: 253 tons, 5.3 %
- Hull below water: 24 tons
- Hull above water: 109 tons
- On freeboard deck: 84 tons
- Above deck: 36 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,983 lbs / 2,714 Kg = 43.7 x 6.5 " / 165 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.3 ft / 0.7 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 76 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.52

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.518 / 0.533
Length to Beam Ratio: 10.83 : 1
'Natural speed' for length: 22.04 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 %, 19.03 ft / 5.80 m, 17.39 ft / 5.30 m
- Forward deck: 32.00 %, 17.39 ft / 5.30 m, 15.75 ft / 4.80 m
- Aft deck: 33.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Quarter deck: 15.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Average freeboard: 16.47 ft / 5.02 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.3 %
- Above water (accommodation/working, high = better): 158.6 %
Waterplane Area: 14,744 Square feet or 1,370 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 61 lbs/sq ft or 300 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 1.25
- Overall: 0.90
Caution: Hull subject to strain in open-sea
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

Warning: Date too early for machine gun - 3rd battery

Designed as a courier to connect the new wide flung ports of the Empire.
In times of war, able to commerce raid.

With 790 tons of bunker fuel, the ship is able to steam :
22.5knots (45% power) , 2200nm . This allows a 4 day sprint between most ports.
17knots, 11.2 days, 4575nm, or 2000 in 5 days
17knots, 4.9 days, 2000nm
12knots, 35 days, 10,130nm

The protective deck is 20mm over the ends, to defeat light splinters, and
30mm over the amidships, with the slopes 90mm.

Misc Wt :
11 - 1918 fire control
25 - Long range radio

On deck
4t two mine rails + lifts
18 - 'Windcatcher' evaporative cooling
62t - Mailrooms / VIP cabins

In hull
70t - Cargo space / mine storage
36 - 4 x T3 21" Torpedoes 3t each (for anti warship work)

Below water
24 - 2 subsurface tubes each side, 16 torpedoes, 16" size (for anti-merchant work)

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

1922 Basic refit :
1918 FC

Kaiser Kirk · October 10, 2021, 11:03:20 AM

Bakr, Parthian Empire Sentry Frigate laid down 1919
Basic Refit 1922.
Basic AA Refit 1929

F - 17
F - 18
F - 20
F - 21

Quote
Displacement:
4,469 t light; 4,793 t standard; 5,605 t normal; 6,254 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(460.96 ft / 456.04 ft) x 47.01 ft x (18.86 / 20.48 ft)
(140.50 m / 139.00 m) x 14.33 m x (5.75 / 6.24 m)

Armament:
8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 250 per gun
Quick firing guns in deck and hoist mounts, 1919 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 x Single mounts on side ends, evenly spread
4 - 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, 1919 Model
4 x Single mounts on side ends, evenly spread
4 raised mounts
12 - 1.18" / 30.0 mm 80.0 cal guns - 0.95lbs / 0.43kg shells, 1,000 per gun
Anti-air guns in deck mounts, 1929 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
16 - 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
2 x Single mounts layout not set
6 x Twin mounts on sides, evenly spread
6 double raised mounts
Weight of broadside 1,262 lbs / 572 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 296.42 ft / 90.35 m 8.20 ft / 2.50 m
Ends: 0.98" / 25 mm 159.58 ft / 48.64 m 8.20 ft / 2.50 m
Main Belt covers 100 % 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: 3.94" / 100 mm 1.18" / 30 mm 3.54" / 90 mm
2nd: 0.24" / 6 mm - -
3rd: 0.31" / 8 mm - -
4th: 0.31" / 8 mm - -

- Armoured deck - single deck:
For and Aft decks: 1.38" / 35 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 3.94" / 100 mm, Aft 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 3 shafts, 35,534 shp / 26,509 Kw = 27.50 kts
Range 6,720nm at 16.00 kts
Bunker at max displacement = 1,460 tons

Complement:
323 - 421

Cost:
£0.966 million / $3.865 million

Distribution of weights at normal displacement:
Armament: 309 tons, 5.5 %
- Guns: 309 tons, 5.5 %
Armour: 933 tons, 16.6 %
- Belts: 440 tons, 7.8 %
- Armament: 110 tons, 2.0 %
- Armour Deck: 343 tons, 6.1 %
- Conning Towers: 40 tons, 0.7 %
Machinery: 1,262 tons, 22.5 %
Hull, fittings & equipment: 1,586 tons, 28.3 %
Fuel, ammunition & stores: 1,136 tons, 20.3 %
Miscellaneous weights: 379 tons, 6.8 %
- Hull below water: 70 tons
- Hull void weights: 10 tons
- Hull above water: 60 tons
- On freeboard deck: 110 tons
- Above deck: 129 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,528 lbs / 2,507 Kg = 40.3 x 6.5 " / 165 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.0 ft / 0.6 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.485 / 0.499
Length to Beam Ratio: 9.70 : 1
'Natural speed' for length: 21.36 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 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 %, 18.37 ft / 5.60 m, 16.08 ft / 4.90 m
- Forward deck: 30.00 %, 16.08 ft / 4.90 m, 13.45 ft / 4.10 m
- Aft deck: 35.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
- Quarter deck: 15.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
- Average freeboard: 14.55 ft / 4.44 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.3 %
- Above water (accommodation/working, high = better): 116.8 %
Waterplane Area: 14,093 Square feet or 1,309 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 75 lbs/sq ft or 368 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 1.27
- Overall: 0.90
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room

1929 Basic AA Refit

Misc Wt (post refit)
10t - Wt Reserve

AD
31t - Fire Control 1918
25t - LR radio
0t - SR radio
23t - 30m cage mast (battleship level sight lines)
25t - Hulesmeyer
25t - Night Fighting Searchlight tower

OD
5t - Paravanes
25t Scout Floatplane (allowance for Ftr)
5t - Gunpowder Cat
5t - Hanger
30t - additional accommodations
32t - 2x T4 21" 4t torpedoes on fantail
8t - depth charge rack on fan tail. 24x280kg

HAW
25t - Imp Fire suppression
5t - C02 Compressor A/C
30t - additional accommodations

HBW
15t - Enhanced Hydrophones
30t - Reserve space
25t - Imp Pumps

Decks :
4.1m: Weather deck
1.5m : Battery Deck, Top Main Belt, Crown protective deck deck
-1.0m : Main Deck, Bottom main belt, lower edge protective deck
-4.5 : Engineering
-5.0 : Double bottom (liquid filled)

Displacement:
   4,495 t light; 4,793 t standard; 5,605 t normal; 6,254 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (460.96 ft / 456.04 ft) x 47.01 ft x (18.86 / 20.48 ft)
   (140.50 m / 139.00 m) x 14.33 m x (5.75 / 6.24 m)

Armament:
8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1919 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x Single mounts on side ends, evenly spread
4 - 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, 1919 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 1,243 lbs / 564 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   296.42 ft / 90.35 m   8.20 ft / 2.50 m
   Ends:   0.98" / 25 mm   159.58 ft / 48.64 m   8.20 ft / 2.50 m
     Main Belt covers 100 % 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:   3.94" / 100 mm   1.18" / 30 mm      3.54" / 90 mm
   2nd:   0.24" / 6 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 1.38" / 35 mm
   Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 3.94" / 100 mm, Aft 1.97" / 50 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 35,534 shp / 26,509 Kw = 27.50 kts
   Range 6,720nm at 16.00 kts
   Bunker at max displacement = 1,460 tons

Complement:
   323 - 421

Cost:
   £0.962 million / $3.846 million

Distribution of weights at normal displacement:
   Armament: 300 tons, 5.3 %
     - Guns: 300 tons, 5.3 %
   Armour: 928 tons, 16.6 %
     - Belts: 440 tons, 7.8 %
     - Armament: 105 tons, 1.9 %
     - Armour Deck: 343 tons, 6.1 %
     - Conning Towers: 40 tons, 0.7 %
   Machinery: 1,262 tons, 22.5 %
   Hull, fittings & equipment: 1,592 tons, 28.4 %
   Fuel, ammunition & stores: 1,110 tons, 19.8 %
   Miscellaneous weights: 413 tons, 7.4 %
     - Hull below water: 70 tons
     - Hull void weights: 45 tons
     - Hull above water: 60 tons
     - On freeboard deck: 130 tons
     - Above deck: 108 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,610 lbs / 2,545 Kg = 40.9 x 6.5 " / 165 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.0 ft / 0.6 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.485 / 0.499
   Length to Beam Ratio: 9.70 : 1
   'Natural speed' for length: 21.36 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 15.00 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 %, 18.37 ft / 5.60 m, 16.08 ft / 4.90 m
     - Forward deck:   30.00 %, 16.08 ft / 4.90 m, 13.45 ft / 4.10 m
     - Aft deck:   35.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Quarter deck:   15.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Average freeboard:      14.55 ft / 4.44 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.4 %
      - Above water (accommodation/working, high = better): 116.8 %
   Waterplane Area: 14,093 Square feet or 1,309 Square metres
   Displacement factor (Displacement / loading): 115 %
   Structure weight / hull surface area: 75 lbs/sq ft or 368 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 1.27
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room

The Parthians are concerned that naval combat is looking
like rock>paper>scissors>rock.

The descriptions from the Sino-Japanese war of 'skirmish' lines seems to be an effective means of dealing with light fast raider forces. There seems to be further emerging threats such as aerial or undersea, both of which can likely be best handled if detected further out.

All of this suggests having a specialized 'sentry' ship, which simply needs sufficient speed to manuever around fleet elements.
While the Parthian battleline is 20knots, the newest heavy ships are 26 knots, and the older ACs are 27knots. So a speed of roughly 27-28 knots is needed to ensure widest utility.

As they would conceptually be advanced to ~18000m towards any onrushing MTB/DD night attack, they need to be fitted with sufficient fire control to divide fire and rapidly destroy attackers on both sides of the vessel.

Seakeeping is not critical, as those light attackers would do poorly in heavier seastates.

Due to poor development of ASW techniques, they are fitted with depth charges and hydrophones, and equipped for battery use 'on station' while hunting. In reality they are far to big and expensive to be good choices in this role. The hydrophones will help pick up distant propellers though.

Misc Wt
45t - Wt Reserve

60t - Dual Fire Control - 1918
25t - LR radio
23t - 30m cage mast (battleship level sight lines)

25t - Hulesmeyer
25t - War Tubas
25t - Night Fighting
25t - Kite Balloon
30t - additional accomodations

22t - 2x T3 21" torpedoes on fantail
8t - depth charge rack on fan tail.

25t - Imp Fire suppression
5t - A/C
30t - additional accommodations

15t - Hydrophones
30t - Reserve space
25t - Imp Pumps

Decks :
4.1m: Weather deck
1.5m : Battery Deck, Top Main Belt, Crown protective deck deck
-1.0m : Main Deck, Bottom main belt, lower edge protective deck
-4.5 : Engineering
-5.0 : Double bottom (liquid filled)

1922 Basic Refit
Updated dual FC to 1918

Kaiser Kirk · September 18, 2023, 08:14:14 PM

Artesmia II, Parthian Frigate laid down 1923

F - 21
F - 22
F - 23
F - 24

Quote
Displacement:
3,000 t light; 3,177 t standard; 3,771 t normal; 4,247 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(462.60 ft / 456.04 ft) x 44.29 ft x (14.21 / 15.49 ft)
(141.00 m / 139.00 m) x 13.50 m x (4.33 / 4.72 m)

Armament:
4 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 200 per gun
Quick firing guns in deck and hoist mounts, 1923 Model
2 x 2-gun mounts on centreline ends, evenly spread
8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 200 per gun
Quick firing guns in casemate mounts, 1923 Model
8 x Single mounts on side ends, evenly spread
4 raised mounts
8 - 2.24" / 57.0 mm 45.0 cal guns - 5.71lbs / 2.59kg shells, 150 per gun
Anti-air guns in deck and hoist mounts, 1923 Model
4 x Single mounts on side ends, evenly spread
16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 3,000 per gun
Machine guns in deck mounts, 1923 Model
6 x Twin mounts on sides, evenly spread
6 raised mounts
2 x Twin mounts on centreline ends, evenly spread
2 double raised mounts
Weight of broadside 894 lbs / 406 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.38" / 35 mm 1.38" / 35 mm
2nd: 1.57" / 40 mm 1.38" / 35 mm 1.38" / 35 mm
3rd: 0.31" / 8 mm - -
4th: 0.24" / 6 mm - -

- Box over magazines:
1.38" / 35 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 44,273 shp / 33,028 Kw = 31.00 kts
Range 9,110nm at 14.00 kts
Bunker at max displacement = 1,070 tons

Complement:
239 - 312

Cost:
£1.096 million / $4.382 million

Distribution of weights at normal displacement:
Armament: 209 tons, 5.6 %
- Guns: 209 tons, 5.6 %
Armour: 101 tons, 2.7 %
- Armament: 70 tons, 1.8 %
- Armour Deck: 31 tons, 0.8 %
Machinery: 1,473 tons, 39.1 %
Hull, fittings & equipment: 1,056 tons, 28.0 %
Fuel, ammunition & stores: 771 tons, 20.4 %
Miscellaneous weights: 162 tons, 4.3 %
- Hull below water: 15 tons
- Hull void weights: 17 tons
- Hull above water: 3 tons
- On freeboard deck: 71 tons
- Above deck: 56 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,866 lbs / 846 Kg = 27.8 x 5.1 " / 130 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 2.5 ft / 0.8 m
Roll period: 11.7 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 rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.460 / 0.475
Length to Beam Ratio: 10.30 : 1
'Natural speed' for length: 21.36 kts
Power going to wave formation at top speed: 59 %
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 %, 23.62 ft / 7.20 m, 21.33 ft / 6.50 m
- Forward deck: 21.00 %, 21.33 ft / 6.50 m, 19.03 ft / 5.80 m
- Aft deck: 44.00 %, 10.83 ft / 3.30 m, 10.83 ft / 3.30 m
- Quarter deck: 15.00 %, 10.83 ft / 3.30 m, 10.83 ft / 3.30 m
- Average freeboard: 15.07 ft / 4.59 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 144.2 %
- Above water (accommodation/working, high = better): 143.4 %
Waterplane Area: 12,991 Square feet or 1,207 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 56 lbs/sq ft or 274 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 1.06
- Overall: 0.75
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room

Basically it's a down-scaled USS Omaha with a 130mm main armament instead of 152mm.

It's meant to provide ships to replace the antiquated Artesmia class of sailing frigates
as well as provide fleet 'skirmishers', colonial patrol etc.
All better done with a small cruiser than a big destroyer.

The armament is meant to be reminiscent of USS Omaha,
with double stacked casements fore & aft on the freeboard deck and superstructure.

While Omaha had 6" this has 130mm as it's meant to engage small light cruisers and destroyers, or conduct offensive raids of it's own.

With it's long range, this is also viewed as a replacement for the Artesmia class Armored Frigates conducting high seas commerce raiding. The only armor is protection around the magazines to ensure they don't explode.

Reserve : 17

AD
21t FC - 1918
25t LR Radio
10t Squadron Plot Room

OD
20+5 : Scout Floatplane + Gunpowder Cat
36t 4TT3 21"
10t : Depth Charges
3t - CO2 Compressor AC

HBW
15t - Enhanced Hydrophones

Kaiser Kirk · September 18, 2023, 08:34:57 PM

Sayyida, Parthian Armored Frigate laid down 1925

1925.0 F - 25
1925.0 F - 26
1926.0 F - 27
1926.0 F - 28
1927.0 F - 29
1927.0 F - 30
1928.0 F - 31
1928.0 F - 32

Quote
Displacement:
3,000 t light; 3,166 t standard; 3,685 t normal; 4,100 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(426.19 ft / 419.95 ft) x 42.65 ft x (15.29 / 16.54 ft)
(129.90 m / 128.00 m) x 13.00 m x (4.66 / 5.04 m)

Armament:
4 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 200 per gun
Quick firing guns in deck and hoist mounts, 1925 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 200 per gun
Anti-air guns in deck mounts, 1925 Model
4 x Single mounts on side ends, evenly spread
8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 500 per gun
Breech loading guns in deck and hoist mounts, 1925 Model
2 x 2-gun mounts on sides amidships
2 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, 3,000 per gun
Breech loading guns in deck mounts, 1925 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 725 lbs / 329 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.59" / 15 mm 323.36 ft / 98.56 m 12.01 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 118 % of normal length

This represents the thickened slopes of the protective deck

- 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: 2.95" / 75 mm 1.38" / 35 mm 1.97" / 50 mm
2nd: 0.31" / 8 mm - -
3rd: 0.31" / 8 mm 0.31" / 8 mm -
4th: 0.31" / 8 mm - -

- Protected deck - multiple decks:
For and Aft decks: 1.38" / 35 mm
Forecastle: 0.98" / 25 mm Quarter deck: 1.38" / 35 mm

Protective deck is 50mm on slopes and 35mm on deck, meant to be proof against HE, Destroyer SAP, and QF Splinters.

- Conning towers: Forward 1.38" / 35 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 34,878 shp / 26,019 Kw = 29.00 kts
Range 8,240nm at 14.00 kts
Bunker at max displacement = 935 tons

Complement:
236 - 307

Cost:
£1.062 million / $4.249 million

Distribution of weights at normal displacement:
Armament: 177 tons, 4.8 %
- Guns: 177 tons, 4.8 %
Armour: 465 tons, 12.6 %
- Belts: 92 tons, 2.5 %
- Armament: 73 tons, 2.0 %
- Armour Deck: 293 tons, 8.0 %
- Conning Tower: 7 tons, 0.2 %
Machinery: 1,132 tons, 30.7 %
Hull, fittings & equipment: 1,026 tons, 27.8 %
Fuel, ammunition & stores: 685 tons, 18.6 %
Miscellaneous weights: 200 tons, 5.4 %
- Hull below water: 18 tons
- Hull void weights: 30 tons
- Hull above water: 6 tons
- On freeboard deck: 48 tons
- Above deck: 98 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,429 lbs / 1,102 Kg = 17.7 x 6.5 " / 165 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.8 ft / 0.6 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.471 / 0.484
Length to Beam Ratio: 9.85 : 1
'Natural speed' for length: 20.49 kts
Power going to wave formation at top speed: 59 %
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: 17.00 %, 23.29 ft / 7.10 m, 20.83 ft / 6.35 m
- Forward deck: 30.00 %, 20.83 ft / 6.35 m, 18.37 ft / 5.60 m
- Aft deck: 47.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Quarter deck: 6.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Average freeboard: 14.81 ft / 4.51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.0 %
- Above water (accommodation/working, high = better): 128.1 %
Waterplane Area: 11,629 Square feet or 1,080 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 58 lbs/sq ft or 281 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.71
- Longitudinal: 1.23
- Overall: 0.75
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room

The Sayyida class is viewed as an alternative to the Artesmia II class.

Main role is independent operations as a patrol vessel, 'show the flag' and general patrol.

Secondary is screening the fleet or independent raids,
acting as a destroyer or torpedo boat leader in the latter case.

Speed of 29knots to be able to operate with most
Parthian Cruisers. It is NOT the 30 or 31 desired.

Opting for a few hard hitting QF guns vs. lots of lighter,
the 4x 165mm are expected to wreck a destroyer with a hit,
while providing the ability to hurt a fellow cruiser close in.

The protective deck with 35mm crown and
50mm slopes is meant to provide defense against destroyer
level weapons.

Night Fighting and reconnaissance abilities
Plotting room for DD Formation

Oceanic range for Pacific operations is preferred,
but difficult. Still 8000*1.10 = 8800nm, not bad.

Misc Wt :
Reserve : 20

AD :
18t FC - 1918
25t LR Radio and Masts
25t Hulesmeyer proximity detector
15t Night fighting gear
15t Squadron Plot Room.

OD
5t - Paravanes
18t - 2x TT3 21"
20+5t : Scout floatplane + gunpowder cat - amidships

2t 2 "Y" throwers
8t DC on fantail

HAW
3t CO2 AC
3t Enhanced fire suppresion

HBW
3t Enhanced Pumps
15t Enhanced Hydrophones

Kaiser Kirk · September 24, 2023, 12:23:39 PM

Manban, Parthian Fleet Sloop laid down 1928

S - 1 Manban "Watchdog"

Quote
Displacement:
500 t light; 534 t standard; 642 t normal; 729 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(160.90 ft / 157.48 ft) x 29.53 ft x (8.73 / 9.66 ft)
(49.04 m / 48.00 m) x 9.00 m x (2.66 / 2.94 m)

Armament:
4 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 190 per gun
Quick firing guns in deck mounts, 1910 Model
2 x 2-gun mounts on centreline ends, evenly spread
1 - 6.42" / 163 mm 20.0 cal gun - 154.32lbs / 70.00kg shells, 100 per gun
Quick firing gun in deck mount, 1922 Model
1 x Single mount on centreline, forward deck aft
1 raised mount
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 2,000 per gun
Machine guns in deck mounts, 1918 Model
2 x Quad mounts on sides amidships
2 x Quad mounts on centreline ends, evenly spread
2 double raised mounts
Weight of broadside 253 lbs / 115 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm - -
2nd: 0.59" / 15 mm - -
3rd: 0.31" / 8 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 3,838 shp / 2,863 Kw = 19.00 kts
Range 4,000nm at 14.00 kts
Bunker at max displacement = 195 tons

Complement:
63 - 82

Cost:
£0.162 million / $0.648 million

Distribution of weights at normal displacement:
Armament: 29 tons, 4.6 %
- Guns: 29 tons, 4.6 %
Armour: 7 tons, 1.0 %
- Armament: 7 tons, 1.0 %
Machinery: 119 tons, 18.6 %
Hull, fittings & equipment: 166 tons, 25.8 %
Fuel, ammunition & stores: 142 tons, 22.1 %
Miscellaneous weights: 179 tons, 27.9 %
- Hull below water: 103 tons
- Hull void weights: 15 tons
- Hull above water: 5 tons
- On freeboard deck: 33 tons
- Above deck: 23 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
828 lbs / 375 Kg = 37.2 x 3.5 " / 90 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.554 / 0.568
Length to Beam Ratio: 5.33 : 1
'Natural speed' for length: 12.55 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.08 ft / 4.90 m, 13.78 ft / 4.20 m
- Forward deck: 40.00 %, 13.78 ft / 4.20 m, 11.15 ft / 3.40 m
- Aft deck: 25.00 %, 11.15 ft / 3.40 m, 11.15 ft / 3.40 m
- Quarter deck: 15.00 %, 11.15 ft / 3.40 m, 10.83 ft / 3.30 m
- Average freeboard: 12.36 ft / 3.77 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.2 %
- Above water (accommodation/working, high = better): 117.8 %
Waterplane Area: 3,257 Square feet or 303 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.60
- Longitudinal: 5.75
- Overall: 0.75
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Manban = Watchdog

The lead vessel was built and put through sea trials before the remainder of the class was laid down.
This allowed for the Diesel-electric system, 163mm ASW howitzer, and command functions to be trialed,
and non-substantial alterations to the designed layout be made for the follow on vessels to allow
greater efficiency.

Intended as a regular-service sloop, the role is more similar to that of a Destroyer,
but it is built to Cruiser-standards of comfort, redundancy, and reliability.
A squadron plot room allows coordination and charting of efforts in ASW, patrol, screen and bombardment efforts.

Theoretially, the 90s will discharge their stick bombs, and then switch to common, while the 163 engages with flat nosed shells which will penetrate the water and hopefully hole or damage the sub.

Diesels +30% wt
Electric +25%
---
55%

119 * .55 = 65.45= 65.5

Range = 4000
Diesel +75%
Elec +15
Geared +10%
---
+100%

Range : 4000 * 200% = 8000nm

Miscellaneous Wt.
Reserve :
15t

AD
3t - Fire Control -1918
10t - Squadron Plot Room
0t - SR Radio
10t - NF gear.

OD
5t - Paravanes
3t - 3 x "Y DC throwers (1 ea. beam, 1 fan tail, + stern rail, for up to 7/ attack)
25t - Depth charges - 75 x 280kg

HAW
5t - Climate control

HBW
15t - Enhanced Hydrophones
10t - Early Sonar
65.5t - DieselElectric
2.5t - 25 "Stick bombs" to fire from 90mm guns
10t - Batteries for Silent Running.

Kaiser Kirk · November 09, 2024, 10:52:21 PM

Designed as an ASW sloop to accompany the battlelines, they are intended to coordinate to prosecute and kill any submarine contacts, catching up to the battlelines later. In fleet combats they are not expected to engage, but will have an auxiliary rescue role.

Marban "Watchdog", Parthian Fleet Sloop laid down 1928

Displacement:
500 t light; 534 t standard; 642 t normal; 729 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(160.90 ft / 157.48 ft) x 29.53 ft x (8.73 / 9.66 ft)
(49.04 m / 48.00 m) x 9.00 m x (2.66 / 2.94 m)

Armament:
4 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 190 per gun
Quick firing guns in deck mounts, 1910 Model
2 x 2-gun mounts on centreline ends, evenly spread
1 - 6.42" / 163 mm 20.0 cal gun - 154.32lbs / 70.00kg shells, 100 per gun
Quick firing gun in deck mount, 1922 Model
1 x Single mount on centreline, forward deck aft
1 raised mount
16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 2,000 per gun
Machine guns in deck mounts, 1918 Model
2 x Quad mounts on sides amidships
2 x Quad mounts on centreline ends, evenly spread
2 double raised mounts
Weight of broadside 253 lbs / 115 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm - -
2nd: 0.59" / 15 mm - -
3rd: 0.31" / 8 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 3,838 shp / 2,863 Kw = 19.00 kts
Range 4,000nm at 14.00 kts
Bunker at max displacement = 195 tons

Complement:
63 - 82

Cost:
£0.162 million / $0.648 million

Distribution of weights at normal displacement:
Armament: 29 tons, 4.6 %
- Guns: 29 tons, 4.6 %
Armour: 7 tons, 1.0 %
- Armament: 7 tons, 1.0 %
Machinery: 119 tons, 18.6 %
Hull, fittings & equipment: 166 tons, 25.8 %
Fuel, ammunition & stores: 142 tons, 22.1 %
Miscellaneous weights: 179 tons, 27.9 %
- Hull below water: 103 tons
- Hull void weights: 15 tons
- Hull above water: 5 tons
- On freeboard deck: 33 tons
- Above deck: 23 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
828 lbs / 375 Kg = 37.2 x 3.5 " / 90 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.554 / 0.568
Length to Beam Ratio: 5.33 : 1
'Natural speed' for length: 12.55 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.08 ft / 4.90 m, 13.78 ft / 4.20 m
- Forward deck: 40.00 %, 13.78 ft / 4.20 m, 11.15 ft / 3.40 m
- Aft deck: 25.00 %, 11.15 ft / 3.40 m, 11.15 ft / 3.40 m
- Quarter deck: 15.00 %, 11.15 ft / 3.40 m, 10.83 ft / 3.30 m
- Average freeboard: 12.36 ft / 3.77 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.2 %
- Above water (accommodation/working, high = better): 117.8 %
Waterplane Area: 3,257 Square feet or 303 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.60
- Longitudinal: 5.75
- Overall: 0.75
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Manban = Watchdog

Much the Same ship as before, but with a tad more BC and sacrifing a knot
but gaining 'good seakeeping' and swapping the 118/21 (apparently /21 not /23) for the a 163/20 Howitzer to engage submarines at or near the surface.
Range is also greatly increased.

Theoretially, the 90s will discharge their stick bombs, and then switch to common, while the 163 engages with flat nosed shells which will penetrate the water and hopefully hole or damage the sub.

Diesels +30% wt
Electric +25%
---
55%

119 * .55 = 65.45= 65.5

Range = 4000
Diesel +75%
Elec +15
Geared +10%
---
+100%

Range : 4000 * 200% = 8000nm

Miscellaneous Wt.
Reserve :
15t

AD
3t - Fire Control
10t - Squadron Plot Room
0t - SR Radio
10t - NF gear.

OD
5t - Paravanes
3t - 3 x "Y DC throwers (1 ea. beam, 1 fan tail, + stern rail, for up to 7/ attack)
25t - Depth charges - 75 x 280kg

HAW
5t - Climate control

HBW
15t - Enhanced Hydrophones
10t - Early Sonar
65.5t - DieselElectric
2.5t - 25 "Stick bombs" to fire from 90mm guns
10t - Batteries for Silent Running.