US-CB-1943, United States Battlecruiser laid down 1943 Displacement: 192,480 t light; 201,981 t standard; 217,137 t normal; 229,261 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (1,366.74 ft / 1,350.00 ft) x 188.00 ft x (38.00 / 39.85 ft) (416.58 m / 411.48 m) x 57.30 m x (11.58 / 12.15 m) Armament: 12 - 21.00" / 533 mm 55.0 cal guns - 5,000.00lbs / 2,267.96kg shells, 150 per gun Breech loading guns in turret on barbette mounts, 1943 Model 3 x Quad mounts on centreline ends, majority forward 1 raised mount - superfiring 24 - 5.00" / 127 mm 55.0 cal guns - 72.00lbs / 32.66kg shells, 150 per gun Breech loading guns in turret on barbette mounts, 1943 Model 12 x Twin mounts on sides, forward deck aft 4 raised mounts - superfiring 88 - 1.57" / 40.0 mm 60.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun Breech loading guns in deck mounts, 1943 Model 22 x 4-gun mounts on sides, evenly spread 12 raised mounts Weight of broadside 61,904 lbs / 28,079 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 18.0" / 457 mm 900.00 ft / 274.32 m 9.00 ft / 2.74 m Ends: Unarmoured Upper: 14.0" / 356 mm 900.00 ft / 274.32 m 9.00 ft / 2.74 m Main Belt covers 103 % of normal length Main belt does not fully cover magazines and engineering spaces Main Belt inclined -17.00 degrees (positive = in) - Torpedo Bulkhead - Additional damage containing bulkheads: 8.00" / 203 mm 900.00 ft / 274.32 m 37.00 ft / 11.28 m Beam between torpedo bulkheads 80.00 ft / 24.38 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 20.0" / 508 mm 15.0" / 381 mm 20.0" / 508 mm 2nd: 5.00" / 127 mm 4.00" / 102 mm 5.00" / 127 mm - Armoured deck - multiple decks: For and Aft decks: 8.00" / 203 mm Forecastle: 5.00" / 127 mm Quarter deck: 8.00" / 203 mm - Conning towers: Forward 20.00" / 508 mm, Aft 15.00" / 381 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 10 shafts, 637,542 shp / 475,606 Kw = 35.00 kts Range 12,000nm at 18.00 kts Bunker at max displacement = 27,280 tons Complement: 5,029 - 6,538 Cost: £105.209 million / $420.837 million Distribution of weights at normal displacement: Armament: 11,042 tons, 5.1 % - Guns: 11,042 tons, 5.1 % Armour: 69,922 tons, 32.2 % - Belts: 11,396 tons, 5.2 % - Torpedo bulkhead: 9,857 tons, 4.5 % - Armament: 12,878 tons, 5.9 % - Armour Deck: 33,067 tons, 15.2 % - Conning Towers: 2,724 tons, 1.3 % Machinery: 16,465 tons, 7.6 % Hull, fittings & equipment: 95,051 tons, 43.8 % Fuel, ammunition & stores: 24,657 tons, 11.4 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 495,302 lbs / 224,665 Kg = 107.0 x 21.0 " / 533 mm shells or 150.3 torpedoes Stability (Unstable if below 1.00): 1.36 Metacentric height 22.2 ft / 6.8 m Roll period: 16.8 seconds Steadiness - As gun platform (Average = 50 %): 58 % - Recoil effect (Restricted arc if above 1.00): 0.32 Seaboat quality (Average = 1.00): 1.15 Hull form characteristics: Hull has a flush deck, an extended bulbous bow and large transom stern Block coefficient (normal/deep): 0.788 / 0.793 Length to Beam Ratio: 7.18 : 1 'Natural speed' for length: 41.90 kts Power going to wave formation at top speed: 49 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 20.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 20.00 %, 46.00 ft / 14.02 m, 40.00 ft / 12.19 m - Forward deck: 30.00 %, 40.00 ft / 12.19 m, 38.00 ft / 11.58 m - Aft deck: 35.00 %, 38.00 ft / 11.58 m, 37.00 ft / 11.28 m - Quarter deck: 15.00 %, 37.00 ft / 11.28 m, 38.00 ft / 11.58 m - Average freeboard: 38.93 ft / 11.87 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 129.5 % - Above water (accommodation/working, high = better): 332.2 % Waterplane Area: 229,646 Square feet or 21,335 Square metres Displacement factor (Displacement / loading): 128 % Structure weight / hull surface area: 352 lbs/sq ft or 1,718 Kg/sq metre Hull strength (Relative): - Cross-sectional: 1.18 - Longitudinal: 0.95 - Overall: 1.00 Cramped machinery, storage, compartmentation space Excellent accommodation and workspace room
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Friday, July 17, 2009
A super American battlecruiser: the US/CB/1943
I have been toying with very large battleship and battlecruiser designs since I was young. This is a fast battlecruiser armed with 12-21in/55 guns. I don't like the deep draft, but I don't see an alternative.
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