GB/CB/1916 Protected, Great Britain Battlecruiser laid down 1916 (Engine 1921)
Displacement:
42,841 t light; 44,542 t standard; 46,914 t normal; 48,811 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(862.86 ft / 855.00 ft) x 105.00 ft x (31.00 / 32.02 ft)
(263.00 m / 260.60 m) x 32.00 m x (9.45 / 9.76 m)
Armament:
6 - 16.50" / 419 mm 45.0 cal guns - 2,265.01lbs / 1,027.39kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1916 Model
2 x Triple mounts on centreline, forward deck forward
1 raised mount - superfiring
10 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1916 Model
10 x Single mounts on sides, forward deck aft
2 raised mounts - superfiring
Weight of broadside 14,590 lbs / 6,618 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 610.00 ft / 185.93 m 8.00 ft / 2.44 m
Ends: Unarmoured
Upper: 8.00" / 203 mm 610.00 ft / 185.93 m 8.00 ft / 2.44 m
Main Belt covers 110 % of normal length
Main belt does not fully cover magazines and engineering spaces
Main Belt inclined -12.00 degrees (positive = in)
- Torpedo Bulkhead - Additional damage containing bulkheads:
2.00" / 51 mm 610.00 ft / 185.93 m 31.00 ft / 9.45 m
Beam between torpedo bulkheads 64.00 ft / 19.51 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 8.00" / 203 mm 12.0" / 305 mm
2nd: 4.00" / 102 mm 3.00" / 76 mm 4.00" / 102 mm
- Armoured deck - multiple decks:
For and Aft decks: 3.00" / 76 mm
Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm
- Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 259,314 shp / 193,448 Kw = 34.00 kts
Range 5,400nm at 16.00 kts
Bunker at max displacement = 4,269 tons
Complement:
1,593 - 2,071
Cost:
£6.740 million / $26.962 million
Distribution of weights at normal displacement:
Armament: 2,467 tons, 5.3 %
- Guns: 2,467 tons, 5.3 %
Armour: 12,455 tons, 26.5 %
- Belts: 4,052 tons, 8.6 %
- Torpedo bulkhead: 1,399 tons, 3.0 %
- Armament: 2,808 tons, 6.0 %
- Armour Deck: 3,635 tons, 7.7 %
- Conning Towers: 560 tons, 1.2 %
Machinery: 8,930 tons, 19.0 %
Hull, fittings & equipment: 18,989 tons, 40.5 %
Fuel, ammunition & stores: 4,073 tons, 8.7 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
62,606 lbs / 28,398 Kg = 27.9 x 16.5 " / 419 mm shells or 7.7 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 6.8 ft / 2.1 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.71
Seaboat quality (Average = 1.00): 1.12
Hull form characteristics:
Hull has low quarterdeck ,
an extended bulbous bow and a cruiser stern
Block coefficient (normal/deep): 0.590 / 0.594
Length to Beam Ratio: 8.14 : 1
'Natural speed' for length: 29.24 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 37.00 ft / 11.28 m, 32.00 ft / 9.75 m
- Forward deck: 30.00 %, 32.00 ft / 9.75 m, 30.00 ft / 9.14 m
- Aft deck: 22.00 %, 30.00 ft / 9.14 m, 30.00 ft / 9.14 m
- Quarter deck: 28.00 %, 22.00 ft / 6.71 m, 23.00 ft / 7.01 m
- Average freeboard: 29.00 ft / 8.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 144.8 %
- Above water (accommodation/working, high = better): 237.8 %
Waterplane Area: 65,049 Square feet or 6,043 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 209 lbs/sq ft or 1,020 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.41
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
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Saturday, September 06, 2008
The GB/CB/1916 with a long belt
With a long belt, the GB/CB/1916 can still make 34 knots. The original concept for the design was to use a very short armour belt so as to make the maximum speed. This is a version with a longer belt (110% of normal). This is the Springsharp report:
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