Gun Boats

Jefgte · August 16, 2017, 04:28:21 PM

1917H2

Where are they ?	Affectation	Name	Qty	LD	Class	Displ,	Armament	Speed	Range-Speed
Madagascar	1st PB	P7-P8	2	1917	P900	900	2x102+1x76,2	21,3	5000nm-10kts
Port Darwin	2nd PB	P5-P6	2	1917	P900	900	2x102+1x76,2	21,3	5000nm-10kts
Walvis Bay	3rd PB	P3-P4	2	1917	P900	900	2x102+1x76,2	21,3	5000nm-10kts
Salvador	4th PB	P1-P2	2	1917	P900	900	2x102+1x76,2	21,3	5000nm-10kts
Sunda Islands	5th PB	TGB47-TGB48	2	1899	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Gladstone	6th PB	TGB45-TGB46	2	1899	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Honaria (Salomon)	7th PB	TGB43-TGB44	2	1899	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Manokwari (New Guinea)	8th PB	TGB41-TGB42	2	1898	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Aden	9th PB	TGB39-TGB40	2	1898	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Madagascar	10th PB	TGB37-TGB38	2	1898	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Seychelles-Mahé	11th PB	TGB35-TGB36	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Comores-Mayotte	12th PB	TGB33-TGB34	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Réunion-Maurice	13th PB	TGB31-TGB32	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Walvis Bay	14th PB	TGB29-TGB30	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Salvador	15th PB	TGB27-TGB28	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
Porto Seguro	16th PB	TGB25-TGB26	2	1897	TGB500	500	4x120+2x47+4TTx457	21,5	2400nm-9kts
			32	PATROL BOATS

Jefgte · August 16, 2017, 05:42:58 PM

River gunboats to patrol on all rivers of the Empire

1890:
RGB1-RGB12
1892:
RGB13-RGB24
1894:
RGB25-RGB32

Akaba class, Byzantine Empire RGB laid down 1890

Displacement:
   125 t light; 128 t standard; 135 t normal; 140 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (124,67 ft / 124,67 ft) x 19,69 ft x (4,33 / 4,45 ft)
   (38,00 m / 38,00 m) x 6,00 m x (1,32 / 1,36 m)

Armament:
2 - 1,85" / 47,0 mm 45,0 cal guns - 3,20lbs / 1,45kg shells, 150 per gun
     Quick firing guns in deck mounts, 1890 Model
     2 x Single mounts on centreline ends, evenly spread
2 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,00kg shells, 2 000 per gun
     Machine guns in deck mounts, 1890 Model
     2 x Single mounts on centreline, evenly spread
Weight of broadside 6 lbs / 3 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,25" / 6 mm     -           -
   2nd:   0,25" / 6 mm     -           -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 190 ihp / 141 Kw = 11,44 kts
   Range 850nm at 8,00 kts
   Bunker at max displacement = 12 tons (100% coal)

Complement:
   19 - 25

Cost:
   £0,010 million / $0,040 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 1,1 %
     - Guns: 2 tons, 1,1 %
   Armour: 3 tons, 1,9 %
     - Armament: 3 tons, 1,9 %
   Machinery: 37 tons, 27,3 %
   Hull, fittings & equipment: 60 tons, 44,4 %
   Fuel, ammunition & stores: 10 tons, 7,5 %
   Miscellaneous weights: 24 tons, 17,8 %
     - On freeboard deck: 14 tons
     - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     266 lbs / 121 Kg = 83,9 x 1,9 " / 47 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,27
   Metacentric height 0,7 ft / 0,2 m
   Roll period: 10,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 96 %
         - Recoil effect (Restricted arc if above 1.00): 0,04
   Seaboat quality (Average = 1.00): 2,00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,444 / 0,449
   Length to Beam Ratio: 6,33 : 1
   'Natural speed' for length: 11,17 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 0,00 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 %, 8,53 ft / 2,60 m, 7,22 ft / 2,20 m
     - Forward deck:   32,00 %, 7,22 ft / 2,20 m, 6,56 ft / 2,00 m
     - Aft deck:   30,00 %, 6,56 ft / 2,00 m, 6,56 ft / 2,00 m
     - Quarter deck:   18,00 %, 6,56 ft / 2,00 m, 6,56 ft / 2,00 m
     - Average freeboard:      6,90 ft / 2,10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92,1 %
      - Above water (accommodation/working, high = better): 104,5 %
   Waterplane Area: 1 558 Square feet or 145 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 25 lbs/sq ft or 124 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,89
      - Longitudinal: 2,98
      - Overall: 1,00
   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

This ship is also equipped with sails
14t reserved for sails or different materials
1906 Refit:
10 t for Marconi

Jefgte · August 25, 2017, 04:50:26 PM

Built to patrol and protect the coastlines and sea lines of the Empire.

GB1000, Byzantine Empire Gunboat laid down 1890

GB1 to GB12 - LD in 1890
GB13 to GB24 - LD in 1891
GB25 to GB28 - LD in 1892

All Scrapped in 1914-1915

Displacement:
   1 000 t light; 1 044 t standard; 1 132 t normal; 1 202 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (245,00 ft / 240,00 ft) x 28,00 ft x (10,25 / 10,76 ft)
   (74,68 m / 73,15 m) x 8,53 m x (3,12 / 3,28 m)

Armament:
2 - 6,00" / 152 mm 45,0 cal guns - 108,93lbs / 49,41kg shells, 140 per gun
     Quick firing guns in deck and hoist mounts, 1890 Model
     2 x Single mounts on centreline ends, evenly spread
2 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 200 per gun
     Quick firing guns in deck mounts, 1890 Model
     2 x Single mounts on sides, forward deck aft
4 - 1,85" / 47,0 mm 45,0 cal guns - 3,20lbs / 1,45kg shells, 250 per gun
     Quick firing guns in deck mounts, 1890 Model
     4 x Single mounts on sides, evenly spread
2 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,00kg shells, 2 000 per gun
     Machine guns in deck mounts, 1890 Model
     2 x Single mounts on sides amidships
      2 raised mounts
Weight of broadside 258 lbs / 117 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,78" / 20 mm   0,78" / 20 mm      0,78" / 20 mm
   2nd:   0,79" / 20 mm     -           -
   3rd:   0,39" / 10 mm     -           -
   4th:   0,39" / 10 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 0,78" / 20 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 3 270 ihp / 2 440 Kw = 17,97 kts
   Range 1 900nm at 10,00 kts
   Bunker at max displacement = 157 tons (100% coal)

Complement:
   96 - 126

Cost:
   £0,126 million / $0,504 million

Distribution of weights at normal displacement:
   Armament: 66 tons, 5,8 %
     - Guns: 66 tons, 5,8 %
   Armour: 76 tons, 6,7 %
     - Armament: 21 tons, 1,9 %
     - Armour Deck: 55 tons, 4,8 %
   Machinery: 488 tons, 43,1 %
   Hull, fittings & equipment: 342 tons, 30,2 %
   Fuel, ammunition & stores: 132 tons, 11,6 %
   Miscellaneous weights: 28 tons, 2,5 %
     - Hull below water: 8 tons
     - On freeboard deck: 10 tons
     - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     457 lbs / 207 Kg = 4,2 x 6,0 " / 152 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,22
   Metacentric height 1,1 ft / 0,3 m
   Roll period: 11,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,43
   Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
   Hull has raised forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,575 / 0,582
   Length to Beam Ratio: 8,57 : 1
   'Natural speed' for length: 15,49 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): -15,00 degrees
   Stern overhang: 1,00 ft / 0,30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   18,00 %, 8,00 ft / 2,44 m, 11,00 ft / 3,35 m
     - Forward deck:   30,00 %, 7,00 ft / 2,13 m, 7,00 ft / 2,13 m
     - Aft deck:   32,00 %, 7,00 ft / 2,13 m, 7,00 ft / 2,13 m
     - Quarter deck:   20,00 %, 7,00 ft / 2,13 m, 7,00 ft / 2,13 m
     - Average freeboard:      7,50 ft / 2,29 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 158,8 %
      - Above water (accommodation/working, high = better): 66,7 %
   Waterplane Area: 4 801 Square feet or 446 Square metres
   Displacement factor (Displacement / loading): 71 %
   Structure weight / hull surface area: 52 lbs/sq ft or 253 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,27
      - Overall: 1,00
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

8t for 4 subTT x 15''
10t reserved

1902 refit
10t for Marconi

Jefgte · September 07, 2017, 05:02:44 PM

Armored Gun Boat 5850 is rebuilt with new 191/45 guns (Hawkins), new 120mm guns & new engines to update the speed to 24kts & 6000nm range.
Cost:3.42$ & 1.45BP.

Byzantine Navy hope to use that class for 12-15 more years.

AGB5850 to AGB 4450t, Byzantine Empire Armored Colonial Gunboat laid down 1897 (Engine 1921)

Amman - Bagdad
Sanaa - Cairo

Displacement:
   4 450 t light; 4 648 t standard; 4 912 t normal; 5 123 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (410,00 ft / 404,00 ft) x 57,00 ft x (11,93 / 12,35 ft)
   (124,97 m / 123,14 m) x 17,37 m x (3,64 / 3,77 m)

Armament:
4 - 7,52" / 191 mm 45,0 cal guns - 214,42lbs / 97,26kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1921 Model
     2 x Twin mounts on centreline ends, evenly spread
8 - 4,72" / 120 mm 45,0 cal guns - 53,18lbs / 24,12kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1921 Model
     8 x Single mounts on sides, evenly spread
8 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 1 000 per gun
     Anti-air guns in deck mounts, 1928 Model
     4 x 2-gun mounts on sides, evenly spread
      4 raised mounts
4 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 4 000 per gun
     Machine guns in deck mounts, 1928 Model
     2 x 2-gun mounts on side ends, evenly spread
      2 raised mounts
Weight of broadside 1 338 lbs / 607 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,94" / 100 mm   374,02 ft / 114,00 m   10,33 ft / 3,15 m
   Ends:   0,98" / 25 mm     29,53 ft / 9,00 m   6,00 ft / 1,83 m
     0,46 ft / 0,14 m Unarmoured ends
   Upper:   0,98" / 25 mm   374,02 ft / 114,00 m   6,56 ft / 2,00 m
     Main Belt covers 142 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4,72" / 120 mm   1,38" / 35 mm      3,94" / 100 mm
   2nd:   0,79" / 20 mm     -         1,57" / 40 mm
   3rd:   0,39" / 10 mm     -           -
   4th:   0,39" / 10 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 3,94" / 100 mm, Aft 1,38" / 35 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 23 000 shp / 17 158 Kw = 24,07 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 475 tons (25% coal)

Complement:
   293 - 381

Cost:
   £0,393 million / $1,573 million

Distribution of weights at normal displacement:
   Armament: 319 tons, 6,5 %
     - Guns: 319 tons, 6,5 %
   Armour: 1 235 tons, 25,1 %
     - Belts: 709 tons, 14,4 %
     - Armament: 142 tons, 2,9 %
     - Armour Deck: 351 tons, 7,1 %
     - Conning Towers: 33 tons, 0,7 %
   Machinery: 810 tons, 16,5 %
   Hull, fittings & equipment: 1 939 tons, 39,5 %
   Fuel, ammunition & stores: 462 tons, 9,4 %
   Miscellaneous weights: 147 tons, 3,0 %
     - Hull below water: 30 tons
     - Hull above water: 30 tons
     - On freeboard deck: 30 tons
     - Above deck: 57 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8 345 lbs / 3 785 Kg = 39,3 x 7,5 " / 191 mm shells or 1,7 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 2,8 ft / 0,9 m
   Roll period: 14,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,39
   Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
   Hull has raised forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,630
   Length to Beam Ratio: 7,09 : 1
   'Natural speed' for length: 20,10 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): -15,00 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 %, 22,31 ft / 6,80 m, 20,34 ft / 6,20 m
     - Forward deck:   30,00 %, 16,40 ft / 5,00 m, 14,27 ft / 4,35 m
     - Aft deck:   30,00 %, 14,27 ft / 4,35 m, 14,27 ft / 4,35 m
     - Quarter deck:   20,00 %, 14,27 ft / 4,35 m, 14,27 ft / 4,35 m
     - Average freeboard:      15,96 ft / 4,87 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78,7 %
      - Above water (accommodation/working, high = better): 166,1 %
   Waterplane Area: 17 255 Square feet or 1 603 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 90 lbs/sq ft or 437 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,54
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

16t for 4 subTT x 15'' + 4 reloads
32t for top fire control - 1914
25t for Marconi
30t for additionnal pumps
30t for additionnal ventilation
24t reserved

------------------------

Originally built as a small Armored Cruiser, this Armored Gunboat is made to help Torpedo Gunboats in battles by engaging enemy ships.
He could also carried out some escort operations.

In 1912, all 4 ships were renamed Light Armored Cruiser & affected to colonies

AGB5850, Byzantine Empire Armored Gunboat laid down 1897

Amman - Bagdad
Sanaa - Cairo

Displacement:
   5 850 t light; 6 063 t standard; 6 534 t normal; 6 911 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (410,00 ft / 404,00 ft) x 57,00 ft x (15,87 / 16,63 ft)
   (124,97 m / 123,14 m) x 17,37 m x (4,84 / 5,07 m)

Armament:
4 - 7,50" / 191 mm 45,0 cal guns - 212,75lbs / 96,50kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1897 Model
     2 x Twin mounts on centreline ends, evenly spread
8 - 4,00" / 102 mm 45,0 cal guns - 32,28lbs / 14,64kg shells, 180 per gun
     Quick firing guns in deck mounts, 1897 Model
     8 x Single mounts on sides, evenly spread
4 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,00kg shells, 2 000 per gun
     Machine guns in deck mounts, 1897 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 1 109 lbs / 503 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,95" / 100 mm   374,00 ft / 114,00 m   7,06 ft / 2,15 m
   Ends:   0,97" / 25 mm     30,00 ft / 9,14 m   6,00 ft / 1,83 m
   Upper:   0,97" / 25 mm   374,00 ft / 114,00 m   6,56 ft / 2,00 m
     Main Belt covers 142 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4,72" / 120 mm   1,38" / 35 mm      3,95" / 100 mm
   3rd:   0,39" / 10 mm     -           -
   4th:   0,39" / 10 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 1,17" / 30 mm
   Forecastle: 0,79" / 20 mm Quarter deck: 0,79" / 20 mm

- Conning towers: Forward 3,95" / 100 mm, Aft 1,37" / 35 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 15 800 ihp / 11 787 Kw = 21,08 kts
   Range 4 000nm at 10,00 kts
   Bunker at max displacement = 848 tons (100% coal)

Complement:
   363 - 472

Cost:
   £0,660 million / $2,639 million

Distribution of weights at normal displacement:
   Armament: 238 tons, 3,6 %
     - Guns: 238 tons, 3,6 %
   Armour: 1 017 tons, 15,6 %
     - Belts: 517 tons, 7,9 %
     - Armament: 112 tons, 1,7 %
     - Armour Deck: 348 tons, 5,3 %
     - Conning Towers: 40 tons, 0,6 %
   Machinery: 2 590 tons, 39,6 %
   Hull, fittings & equipment: 1 819 tons, 27,8 %
   Fuel, ammunition & stores: 684 tons, 10,5 %
   Miscellaneous weights: 186 tons, 2,8 %
     - Hull below water: 16 tons
     - Hull above water: 30 tons
     - On freeboard deck: 30 tons
     - Above deck: 110 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3 730 lbs / 1 692 Kg = 17,7 x 7,5 " / 191 mm shells or 0,8 torpedoes
   Stability (Unstable if below 1.00): 1,52
   Metacentric height 4,4 ft / 1,3 m
   Roll period: 11,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,16
   Seaboat quality (Average = 1.00): 1,16

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,632
   Length to Beam Ratio: 7,09 : 1
   'Natural speed' for length: 20,10 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): -15,00 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 %, 15,10 ft / 4,60 m, 13,12 ft / 4,00 m
     - Forward deck:   30,00 %, 13,12 ft / 4,00 m, 11,00 ft / 3,35 m
     - Aft deck:   30,00 %, 11,00 ft / 3,35 m, 11,00 ft / 3,35 m
     - Quarter deck:   20,00 %, 11,00 ft / 3,35 m, 11,00 ft / 3,35 m
     - Average freeboard:      11,90 ft / 3,63 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 142,2 %
      - Above water (accommodation/working, high = better): 104,4 %
   Waterplane Area: 17 255 Square feet or 1 603 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 84 lbs/sq ft or 408 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,99
      - Longitudinal: 1,07
      - Overall: 1,00
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

16t for 4 subTT x 18'' + 4 reloads
100t for top fire control
30t for additionnal pumps
30t for additionnal ventilation

1909 refit
10t for short marconi

Jefgte · May 13, 2021, 05:35:33 PM

P900, Byzantine Empire Patrol Boat laid down 1917

1917=> P1 - P2 - P3 - P4 - P5 - P6 - P7 - P8 - P9

Displacement:
767 t light; 791 t standard; 900 t normal; 986 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(259,19 ft / 259,19 ft) x 32,48 ft x (7,48 / 8,02 ft)
(79,00 m / 79,00 m) x 9,90 m x (2,28 / 2,44 m)

Armament:
2 - 4,02" / 102 mm 45,0 cal guns - 32,65lbs / 14,81kg shells, 150 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on centreline ends, evenly spread
1 - 3,00" / 76,2 mm 45,0 cal gun - 11,60lbs / 5,26kg shells, 200 per gun
Anti-air gun in deck mount, 1917 Model
1 x Single mount on centreline, aft deck centre
1 raised mount
2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 5 000 per gun
Machine guns in deck mounts, 1917 Model
2 x 2 row twin mounts on sides, forward deck forward
2 raised mounts
Weight of broadside 77 lbs / 35 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,39" / 10 mm - -
2nd: 0,39" / 10 mm - -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Geared drive, 2 shafts, 5 400 ihp / 4 028 Kw = 21,31 kts
   Range 5 000nm at 10,00 kts
   Bunker at max displacement = 178 tons (20% coal)

Complement:
   81 - 106

Cost:
   £0,138 million / $0,552 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1,4 %
     - Guns: 12 tons, 1,4 %
   Armour: 1 tons, 0,1 %
     - Armament: 1 tons, 0,1 %
   Machinery: 326 tons, 36,2 %
   Hull, fittings & equipment: 351 tons, 39,0 %
   Fuel, ammunition & stores: 124 tons, 13,7 %
   Miscellaneous weights: 86 tons, 9,6 %
     - On freeboard deck: 60 tons
     - Above deck: 26 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     988 lbs / 448 Kg = 30,5 x 4,0 " / 102 mm shells or 0,5 torpedoes
   Stability (Unstable if below 1.00): 1,21
   Metacentric height 1,3 ft / 0,4 m
   Roll period: 11,9 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0,08
   Seaboat quality (Average = 1.00): 1,21

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,500 / 0,510
   Length to Beam Ratio: 7,98 : 1
   'Natural speed' for length: 16,10 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 0,00 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 %, 15,09 ft / 4,60 m, 12,14 ft / 3,70 m
     - Forward deck:   30,00 %, 12,14 ft / 3,70 m, 10,50 ft / 3,20 m
     - Aft deck:   30,00 %, 10,50 ft / 3,20 m, 10,50 ft / 3,20 m
     - Quarter deck:   20,00 %, 10,50 ft / 3,20 m, 10,50 ft / 3,20 m
     - Average freeboard:      11,31 ft / 3,45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 121,4 %
      - Above water (accommodation/working, high = better): 143,5 %
   Waterplane Area: 5 609 Square feet or 521 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,88
      - Overall: 1,00
   Cramped 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: 68t
1t for fire control
25t for Long Range Marconi
10t for additionnal ventilation
48t Cargo reserved in hold or new materials or armament if war.

=>Mercantilel rules
900t x 0.25
Cost 0.225BP & 0.225$

Jefgte · July 08, 2021, 03:31:52 PM

Gatyn class, Byzantine Empire River Gunboat laid down 1918

1918 - RGB33 to RGB44

Displacement:
   110 t light; 123 t standard; 128 t normal; 132 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (124,67 ft / 124,67 ft) x 19,69 ft x (3,94 / 4,02 ft)
   (38,00 m / 38,00 m) x 6,00 m x (1,20 / 1,23 m)

Armament:
2 - 4,02" / 102 mm 45,0 cal guns - 32,65lbs / 14,81kg shells, 250 per gun
     Quick firing guns in deck mounts, 1918 Model
     2 x Single mounts on centreline ends, evenly spread
2 - 1,85" / 47,0 mm 45,0 cal guns - 3,20lbs / 1,45kg shells, 300 per gun
     Quick firing guns in deck mounts, 1918 Model
     2 x Single mounts on centreline, evenly spread
8 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 6 000 per gun
     Machine guns in deck mounts, 1918 Model
     8 x Single mounts on side ends, evenly spread
Weight of broadside 72 lbs / 33 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0,39" / 10 mm     85,30 ft / 26,00 m   4,92 ft / 1,50 m
   Ends:   0,39" / 10 mm     13,12 ft / 4,00 m   4,92 ft / 1,50 m
     26,25 ft / 8,00 m Unarmoured ends
     Main Belt covers 105 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm     -           -
   2nd:   0,39" / 10 mm     -           -
   3rd:   0,39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 165 ihp / 123 Kw = 11,08 kts
   Range 1 000nm at 8,00 kts
   Bunker at max displacement = 9 tons (80% coal)

Complement:
   18 - 24

Cost:
   £0,018 million / $0,072 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 10,6 %
     - Guns: 14 tons, 10,6 %
   Armour: 21 tons, 16,1 %
     - Belts: 8 tons, 6,2 %
     - Armament: 13 tons, 9,8 %
   Machinery: 11 tons, 8,2 %
   Hull, fittings & equipment: 53 tons, 41,4 %
   Fuel, ammunition & stores: 18 tons, 14,2 %
   Miscellaneous weights: 12 tons, 9,4 %
     - On freeboard deck: 12 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     378 lbs / 171 Kg = 11,7 x 4,0 " / 102 mm shells or 0,6 torpedoes
   Stability (Unstable if below 1.00): 1,37
   Metacentric height 0,8 ft / 0,2 m
   Roll period: 9,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0,31
   Seaboat quality (Average = 1.00): 1,60

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,463 / 0,467
   Length to Beam Ratio: 6,33 : 1
   'Natural speed' for length: 11,17 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 0,00 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 %, 6,56 ft / 2,00 m, 5,91 ft / 1,80 m
     - Forward deck:   32,00 %, 5,91 ft / 1,80 m, 5,91 ft / 1,80 m
     - Aft deck:   30,00 %, 5,91 ft / 1,80 m, 5,91 ft / 1,80 m
     - Quarter deck:   18,00 %, 5,91 ft / 1,80 m, 5,91 ft / 1,80 m
     - Average freeboard:      5,96 ft / 1,82 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 61,0 %
      - Above water (accommodation/working, high = better): 98,3 %
   Waterplane Area: 1 583 Square feet or 147 Square metres
   Displacement factor (Displacement / loading): 143 %
   Structure weight / hull surface area: 28 lbs/sq ft or 135 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,90
      - Longitudinal: 2,55
      - Overall: 1,00
   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

12t reserved for sails or different materials

Jefgte · March 14, 2024, 01:52:33 AM

Kotu, Byzantine Empire 100t River Gun Boat laid down 1931

RGB49 - RGB50 - RGB51 - RGB52 - RGB53 - RGB54 - RGB55 - RGB56 - RGB57 - RGB58

Displacement:
   100 t light; 127 t standard; 130 t normal; 132 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (124,67 ft / 124,67 ft) x 19,69 ft x (3,94 / 3,99 ft)
   (38,00 m / 38,00 m) x 6,00 m x (1,20 / 1,22 m)

Armament:
2 - 4,02" / 102 mm 45,0 cal guns - 33,00lbs / 14,97kg shells, 250 per gun
     Quick firing guns in deck mounts, 1931 Model
     2 x Single mounts on centreline ends, evenly spread
4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 3 000 per gun
     Anti-air guns in deck mounts, 1931 Model
     2 x 2-gun mounts on centreline, aft evenly spread
8 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 6 000 per gun
     Machine guns in deck mounts, 1931 Model
     4 x 2-gun mounts on side ends, evenly spread
Weight of broadside 75 lbs / 34 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0,79" / 20 mm     82,02 ft / 25,00 m   5,91 ft / 1,80 m
   Ends:   Unarmoured
     Main Belt covers 101 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm     -           -
   2nd:   0,24" / 6 mm     -           -
   3rd:   0,24" / 6 mm     -           -

- Armoured deck - multiple decks:
   For and Aft decks: 0,59" / 15 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 170 shp / 127 Kw = 11,13 kts
   Range 1 000nm at 8,00 kts
   Bunker at max displacement = 5 tons

Complement:
   18 - 24

Cost:
   £0,035 million / $0,139 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 10,7 %
     - Guns: 14 tons, 10,7 %
   Armour: 36 tons, 27,8 %
     - Belts: 16 tons, 12,6 %
     - Armament: 6 tons, 4,3 %
     - Armour Deck: 14 tons, 10,8 %
   Machinery: 5 tons, 3,9 %
   Hull, fittings & equipment: 31 tons, 23,9 %
   Fuel, ammunition & stores: 30 tons, 22,9 %
   Miscellaneous weights: 14 tons, 10,8 %
     - Hull below water: 3 tons
     - On freeboard deck: 11 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     235 lbs / 107 Kg = 7,3 x 4,0 " / 102 mm shells or 0,5 torpedoes
   Stability (Unstable if below 1.00): 1,51
   Metacentric height 0,9 ft / 0,3 m
   Roll period: 8,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 78 %
         - Recoil effect (Restricted arc if above 1.00): 0,20
   Seaboat quality (Average = 1.00): 1,30

Hull form characteristics:
   Hull has raised forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,470 / 0,472
   Length to Beam Ratio: 6,33 : 1
   'Natural speed' for length: 11,17 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   18,00 %, 6,56 ft / 2,00 m, 5,91 ft / 1,80 m
     - Forward deck:   32,00 %, 3,94 ft / 1,20 m, 3,94 ft / 1,20 m
     - Aft deck:   32,00 %, 3,94 ft / 1,20 m, 3,94 ft / 1,20 m
     - Quarter deck:   18,00 %, 3,94 ft / 1,20 m, 3,94 ft / 1,20 m
     - Average freeboard:      4,34 ft / 1,32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 60,6 %
      - Above water (accommodation/working, high = better): 65,9 %
   Waterplane Area: 1 592 Square feet or 148 Square metres
   Displacement factor (Displacement / loading): 135 %
   Structure weight / hull surface area: 19 lbs/sq ft or 95 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,72
      - Longitudinal: 1,17
      - Overall: 0,75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

climatisation
11t reserved for sails or different materials
3t for electric motors

Gun Boats

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