GB/BB/1902 Lighly Armed, Great Britain Battleship laid down 1902
Displacement:
13,513 t light; 14,055 t standard; 15,961 t normal; 17,485 t full load
Dimensions: Length overall / water x beam x draught
490.00 ft / 490.00 ft x 78.00 ft x 24.00 ft (normal load)
149.35 m / 149.35 m x 23.77 m x 7.32 m
Armament:
4 - 10.00" / 254 mm guns (2x2 guns), 500.00lbs / 226.80kg shells, 1902 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1902 Model
Quick firing guns in casemate mounts
on side, all amidships
12 guns in hull casemates - Limited use in heavy seas
Weight of broadside 3,728 lbs / 1,691 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Ends: 5.00" / 127 mm 120.00 ft / 36.58 m 8.00 ft / 2.44 m
Upper: 5.00" / 127 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Main Belt covers 116 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 370.00 ft / 112.78 m 24.00 ft / 7.32 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.50" / 241 mm 6.00" / 152 mm 9.50" / 241 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm
- Armour deck: 1.50" / 38 mm, Conning tower: 9.50" / 241 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 30,225 ihp / 22,548 Kw = 22.00 kts
Range 4,200nm at 15.00 kts
Bunker at max displacement = 3,430 tons (100% coal)
Complement:
709 - 923
Cost:
£1.506 million / $6.022 million
Distribution of weights at normal displacement:
Armament: 466 tons, 2.9 %
Armour: 3,820 tons, 23.9 %
- Belts: 1,558 tons, 9.8 %
- Torpedo bulkhead: 493 tons, 3.1 %
- Armament: 857 tons, 5.4 %
- Armour Deck: 782 tons, 4.9 %
- Conning Tower: 130 tons, 0.8 %
Machinery: 4,580 tons, 28.7 %
Hull, fittings & equipment: 4,647 tons, 29.1 %
Fuel, ammunition & stores: 2,448 tons, 15.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,027 lbs / 6,362 Kg = 28.1 x 10.0 " / 254 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.49
Metacentric height 6.8 ft / 2.1 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.50
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.609
Length to Beam Ratio: 6.28 : 1
'Natural speed' for length: 22.14 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -2.00 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 18.32 ft / 5.58 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 154.7 %
- Above water (accommodation/working, high = better): 136.3 %
Waterplane Area: 28,189 Square feet or 2,619 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 116 lbs/sq ft or 568 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- 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
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
Sunday, October 15, 2006
The lightly-armed battleship design from 1902
Along with the heavily-armed battleship design from the senior officers' course in 1902, John Roberts has a less complete description of the lightly-armed battleship design, which was the alternative to the former. Naturally, I wanted to try that ship in Springsharp, as well. I had less to go on, but I made an attempt, anyway. This is the Springsharp report:
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