GB/BB/1921 Fast, Great Britain Battleship laid down 1921
Displacement:
43,133 t light; 45,212 t standard; 47,700 t normal; 49,690 t full load
Dimensions: Length overall / water x beam x draught
824.00 ft / 824.00 ft x 104.00 ft x 31.00 ft (normal load)
251.16 m / 251.16 m x 31.70 m x 9.45 m
Armament:
8 - 16.00" / 406 mm guns (4x2 guns), 2,048.00lbs / 928.96kg shells, 1921 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 16.00" / 406 mm guns (1x2 guns), 2,048.00lbs / 928.96kg shells, 1921 Model
Breech loading guns in a turret (on a barbette)
on side amidships
14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1921 Model
Quick firing guns in casemate mounts
on side, evenly spread
14 guns in hull casemates - Limited use in heavy seas
Weight of broadside 21,992 lbs / 9,975 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.5" / 292 mm 505.00 ft / 153.92 m 8.00 ft / 2.44 m
Ends: Unarmoured
Upper: 9.00" / 229 mm 505.00 ft / 153.92 m 8.00 ft / 2.44 m
Main Belt covers 94 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
2.00" / 51 mm 505.00 ft / 153.92 m 31.00 ft / 9.45 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 9.00" / 229 mm 12.0" / 305 mm
2nd: 12.0" / 305 mm 9.00" / 229 mm 12.0" / 305 mm
3rd: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
- Armour deck: 5.00" / 127 mm, Conning tower: 12.00" / 305 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 159,080 shp / 118,673 Kw = 29.75 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 4,478 tons
Complement:
1,613 - 2,097
Cost:
£11.673 million / $46.691 million
Distribution of weights at normal displacement:
Armament: 2,749 tons, 5.8 %
Armour: 15,534 tons, 32.6 %
- Belts: 3,584 tons, 7.5 %
- Torpedo bulkhead: 1,158 tons, 2.4 %
- Armament: 4,499 tons, 9.4 %
- Armour Deck: 5,953 tons, 12.5 %
- Conning Tower: 340 tons, 0.7 %
Machinery: 5,478 tons, 11.5 %
Hull, fittings & equipment: 19,372 tons, 40.6 %
Fuel, ammunition & stores: 4,567 tons, 9.6 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
58,852 lbs / 26,695 Kg = 28.7 x 16.0 " / 406 mm shells or 7.9 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 6.2 ft / 1.9 m
Roll period: 17.6 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.83
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.628
Length to Beam Ratio: 7.92 : 1
'Natural speed' for length: 28.71 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: 31.00 ft / 9.45 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (50 %): 28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 24.24 ft / 7.39 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.7 %
- Above water (accommodation/working, high = better): 180.1 %
Waterplane Area: 64,357 Square feet or 5,979 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 215 lbs/sq ft or 1,051 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.15
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
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