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
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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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