GB/CB/1921 15in guns 35 knots, Great Britain Battlecruiser laid down 1921 (Engine 1937)
Displacement:
32,345 t light; 33,654 t standard; 36,500 t normal; 38,777 t full load
Dimensions: Length overall / water x beam x draught
816.31 ft / 814.00 ft x 102.00 ft x 29.00 ft (normal load)
248.81 m / 248.11 m x 31.09 m x 8.84 m
Armament:
6 - 15.00" / 381 mm guns (3x2 guns), 1,687.50lbs / 765.44kg shells, 1921 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 4.70" / 119 mm guns (6 mounts), 51.91lbs / 23.55kg shells, 1921 Model
Quick firing guns in turrets (on barbettes)
on side, all amidships, 4 raised mounts - superfiring
6 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1921 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.89kg shells, 1921 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
Weight of broadside 11,314 lbs / 5,132 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 530.00 ft / 161.54 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 530.00 ft / 161.54 m 29.00 ft / 8.84 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm
2nd: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm
- Armour deck: 4.00" / 102 mm, Conning tower: 9.00" / 229 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 212,697 shp / 158,672 Kw = 35.00 kts
Range 7,500nm at 18.00 kts
Bunker at max displacement = 5,123 tons
Complement:
1,319 - 1,716
Cost:
£8.006 million / $32.025 million
Distribution of weights at normal displacement:
Armament: 1,414 tons, 3.9 %
Armour: 9,336 tons, 25.6 %
- Belts: 1,894 tons, 5.2 %
- Torpedo bulkhead: 569 tons, 1.6 %
- Armament: 2,278 tons, 6.2 %
- Armour Deck: 4,382 tons, 12.0 %
- Conning Tower: 213 tons, 0.6 %
Machinery: 5,895 tons, 16.2 %
Hull, fittings & equipment: 15,699 tons, 43.0 %
Fuel, ammunition & stores: 4,155 tons, 11.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
53,960 lbs / 24,476 Kg = 32.0 x 15.0 " / 381 mm shells or 6.6 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 6.8 ft / 2.1 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.53
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.531
Length to Beam Ratio: 7.98 : 1
'Natural speed' for length: 33.04 kts
Power going to wave formation at top speed: 57 %
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: 33.00 ft / 10.06 m
- Forecastle (20 %): 27.00 ft / 8.23 m
- Mid (35 %): 27.00 ft / 8.23 m
- Quarterdeck (15 %): 27.00 ft / 8.23 m
- Stern: 27.00 ft / 8.23 m
- Average freeboard: 27.48 ft / 8.38 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.7 %
- Above water (accommodation/working, high = better): 230.9 %
Waterplane Area: 59,214 Square feet or 5,501 Square metres
Displacement factor (Displacement / loading): 113 %
Structure weight / hull surface area: 187 lbs/sq ft or 913 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.41
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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.
Tuesday, November 28, 2006
The very fast, Renown-Repulse type ship
This design has very little in common with the Renown and Repulse, except that this ship also has a main armament of 6-15in guns. Otherwise, this is a further expansion of the 12in-gunned, 35 knot design. This is the Springsharp report:
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