GB/BB/1937, Great Britain Battlecruiser laid down 1937 (Engine 1941)
Displacement:
40,099 t light; 42,143 t standard; 43,800 t normal; 45,126 t full load
Dimensions: Length overall / water x beam x draught
752.17 ft / 750.00 ft x 108.00 ft x 29.00 ft (normal load)
229.26 m / 228.60 m x 32.92 m x 8.84 m
Armament:
9 - 16.00" / 406 mm guns (3x3 guns), 2,048.00lbs / 928.96kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1937 Model
Quick firing guns in turrets (on barbettes)
on side, evenly spread, 4 raised mounts
8 - 4.70" / 119 mm guns (4x2 guns), 51.91lbs / 23.55kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
16 - 1.57" / 40.0 mm guns (2x8 guns), 1.95lbs / 0.89kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 1 raised mount - superfiring
8 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1937 Model
Anti-aircraft guns in deck mount
on side, evenly spread, all raised mounts
Weight of broadside 20,622 lbs / 9,354 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 470.00 ft / 143.26 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 470.00 ft / 143.26 m 29.00 ft / 8.84 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 9.00" / 229 mm 14.0" / 356 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm
- Armour deck: 5.00" / 127 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 96,022 shp / 71,632 Kw = 27.00 kts
Range 5,600nm at 15.00 kts
Bunker at max displacement = 2,982 tons
Complement:
1,513 - 1,967
Cost:
£21.404 million / $85.616 million
Distribution of weights at normal displacement:
Armament: 2,578 tons, 5.9 %
Armour: 16,827 tons, 38.4 %
- Belts: 4,616 tons, 10.5 %
- Torpedo bulkhead: 1,513 tons, 3.5 %
- Armament: 4,321 tons, 9.9 %
- Armour Deck: 6,003 tons, 13.7 %
- Conning Tower: 375 tons, 0.9 %
Machinery: 2,538 tons, 5.8 %
Hull, fittings & equipment: 18,157 tons, 41.5 %
Fuel, ammunition & stores: 3,701 tons, 8.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
71,208 lbs / 32,300 Kg = 34.8 x 16.0 " / 406 mm shells or 12.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.7 ft / 2.0 m
Roll period: 17.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.72
Seaboat quality (Average = 1.00): 1.19
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.653
Length to Beam Ratio: 6.94 : 1
'Natural speed' for length: 31.67 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 4.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20 %): 23.00 ft / 7.01 m
- Mid (50 %): 23.00 ft / 7.01 m
- Quarterdeck (15 %): 23.00 ft / 7.01 m
- Stern: 23.00 ft / 7.01 m
- Average freeboard: 23.64 ft / 7.21 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.0 %
- Above water (accommodation/working, high = better): 187.9 %
Waterplane Area: 64,896 Square feet or 6,029 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 214 lbs/sq ft or 1,044 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.34
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
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.
Monday, December 11, 2006
This is the battleship in the design pair: the GB/BB/1937
This is the battleship from my 1980's designs: the GB/BB/1937 with 9-16in guns and a length of 750ft. This is the Springsharp report:
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