Ger/CB/1943 Large, Germany Battlecruiser laid down 1943 Displacement: 137,845 t light; 144,080 t standard; 151,306 t normal; 157,087 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (1,264.14 ft / 1,250.00 ft) x 170.00 ft x (39.00 / 40.20 ft) (385.31 m / 381.00 m) x 51.82 m x (11.89 / 12.25 m) Armament: 9 - 21.00" / 533 mm 50.0 cal guns - 4,900.00lbs / 2,222.60kg shells, 120 per gun Breech loading guns in turret on barbette mounts , 1943 Model 9 x Triple mounts on centreline ends, majority forward 3 raised mounts - superfiring 16 - 6.00" / 152 mm 55.0 cal guns - 116.57lbs / 52.88kg shells, 180 per gun Quick firing guns in turret on barbette mount , 1943 Model 1 x Twin mount on sides amidships 24 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun Anti-air guns in deck and hoist mounts , 1943 Model 12 x Twin mounts on sides, evenly spread 12 raised mounts 64 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 240 per gun Breech loading guns in deck mounts , 1943 Model 32 x Twin mounts on sides, evenly spread 24 raised mounts Weight of broadside 46,886 lbs / 46,886 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 16.0" / 406 mm 840.00 ft / 256.03 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 103 % of normal length - Torpedo Bulkhead: 7.00" / 178 mm 840.00 ft / 256.03 m 39.00 ft / 11.89 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 18.0" / 457 mm 12.0" / 305 mm 18.0" / 457 mm 2nd: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm 3rd: 1.00" / 25 mm - 1.00" / 25 mm - Armour deck: 7.00" / 178 mm, Conning tower: 16.00" / 406 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 8 shafts, 480,244 shp / 358,262 Kw = 35.00 kts Range 10,000nm at 16.00 kts Bunker at max displacement = 13,007 tons Complement: 3,835 - 4,986 Cost: £74.873 million / $299.491 million Distribution of weights at normal displacement: Armament: 7,789 tons, 5.1 % Armour: 54,927 tons, 36.3 % - Belts: 9,227 tons, 6.1 % - Torpedo bulkhead: 8,485 tons, 5.6 % - Armament: 14,469 tons, 9.6 % - Armour Deck: 21,768 tons, 14.4 % - Conning Tower: 979 tons, 0.6 % Machinery: 12,403 tons, 8.2 % Hull, fittings & equipment: 64,708 tons, 42.8 % Fuel, ammunition & stores: 13,461 tons, 8.9 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 297,322 lbs / 134,863 Kg = 64.2 x 21.0 " / 533 mm shells or 81.7 torpedoes Stability (Unstable if below 1.00): 1.17 Metacentric height 14.9 ft / 4.5 m Roll period: 18.5 seconds Steadiness - As gun platform (Average = 50 %): 57 % - Recoil effect (Restricted arc if above 1.00): 0.46 Seaboat quality (Average = 1.00): 1.15 Hull form characteristics: Hull has a flush deck, a normal bow and small transom stern Block coefficient (normal/deep): 0.639 / 0.644 Length to Beam Ratio: 7.35 : 1 'Natural speed' for length: 40.75 kts Power going to wave formation at top speed: 49 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 12.00 degrees Stern overhang: 5.00 ft / 1.52 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 20.00 %, 43.00 ft / 13.11 m, 35.00 ft / 10.67 m - Forward deck: 30.00 %, 35.00 ft / 10.67 m, 33.00 ft / 10.06 m - Aft deck: 35.00 %, 33.00 ft / 10.06 m, 33.00 ft / 10.06 m - Quarter deck: 15.00 %, 33.00 ft / 10.06 m, 35.00 ft / 10.67 m - Average freeboard: 34.49 ft / 10.51 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 64.2 % - Above water (accommodation/working, high = better): 279.4 % Waterplane Area: 168,089 Square feet or 15,616 Square metres Displacement factor (Displacement / loading): 120 % Structure weight / hull surface area: 306 lbs/sq ft or 1,496 Kg/sq metre Hull strength (Relative): - Cross-sectional: 1.08 - Longitudinal: 0.97 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent
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Monday, May 14, 2007
A large, but not extremely large, German battlecruiser
In more recent years, I have been thinking of designing rather large, but not quite so very large ships. This version backs off the size, protection, and range, to reduce the size and cost of a German battlecruiser, the Ger/CB/1943 Large design. This has 9-21in guns and a speed of 35 knots. The range is 10,000nm at 16 knots. The armour basis is 16in with a 7in deck. This is the Springsharp report:
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