GB/CA/1921 10in guns, Great Britain Heavy Cruiser laid down 1921 (Engine 1937)
Displacement:
19,385 t light; 20,162 t standard; 22,300 t normal; 24,010 t full load
Dimensions: Length overall / water x beam x draught
716.62 ft / 715.00 ft x 78.00 ft x 23.00 ft (normal load)
218.43 m / 217.93 m x 23.77 m x 7.01 m
Armament:
9 - 10.00" / 254 mm guns (3x3 guns), 500.00lbs / 226.80kg 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 5,689 lbs / 2,580 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 475.00 ft / 144.78 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 102 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 475.00 ft / 144.78 m 23.00 ft / 7.01 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 5.00" / 127 mm 8.00" / 203 mm
2nd: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm
- Armour deck: 3.00" / 76 mm, Conning tower: 6.00" / 152 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 135,206 shp / 100,864 Kw = 33.00 kts
Range 7,500nm at 18.00 kts
Bunker at max displacement = 3,849 tons
Complement:
912 - 1,186
Cost:
£4.583 million / $18.332 million
Distribution of weights at normal displacement:
Armament: 711 tons, 3.2 %
Armour: 5,680 tons, 25.5 %
- Belts: 1,197 tons, 5.4 %
- Torpedo bulkhead: 404 tons, 1.8 %
- Armament: 1,598 tons, 7.2 %
- Armour Deck: 2,379 tons, 10.7 %
- Conning Tower: 102 tons, 0.5 %
Machinery: 3,747 tons, 16.8 %
Hull, fittings & equipment: 9,246 tons, 41.5 %
Fuel, ammunition & stores: 2,915 tons, 13.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35,144 lbs / 15,941 Kg = 70.3 x 10.0 " / 254 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 4.2 ft / 1.3 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.69
Seaboat quality (Average = 1.00): 1.05
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.608
Length to Beam Ratio: 9.17 : 1
'Natural speed' for length: 30.37 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 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 %): 25.00 ft / 7.62 m
- Mid (35 %): 25.00 ft / 7.62 m
- Quarterdeck (15 %): 25.00 ft / 7.62 m
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 25.48 ft / 7.77 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.3 %
- Above water (accommodation/working, high = better): 223.8 %
Waterplane Area: 42,857 Square feet or 3,982 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 147 lbs/sq ft or 716 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.27
- 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.
Sunday, November 26, 2006
A heavy cruiser with 10in guns
I am pretty happy with this heavy cruiser with 9-10in BLR, 16-4.7in QF, 6-4.7in AA, and 24-2pdr AA guns. The speed is still 33 knots and the armour basis is 5in with a 3in deck. The range is 7,500nm at 18 knots. I am not sure how well this ship would fare against 8in-gunned cruisers, but I would hope that it could outgun and outrange them. This is the Springsharp report:
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