Ger/BB/1941 Very Large, Germany Battleship laid down 1941 Displacement: 165,830 t light; 173,745 t standard; 182,634 t normal; 189,746 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (1,391.65 ft / 1,380.00 ft) x 185.00 ft x (39.00 / 40.23 ft) (424.18 m / 420.62 m) x 56.39 m x (11.89 / 12.26 m) Armament: 12 - 21.00" / 533 mm 50.0 cal guns - 5,000.00lbs / 2,267.96kg shells, 120 per gun Breech loading guns in turret on barbette mounts , 1941 Model 3 x 4-gun mounts on centreline ends, majority forward 1 raised mount - superfiring 16 - 6.00" / 152 mm 55.0 cal guns - 115.00lbs / 52.16kg shells, 180 per gun Quick firing guns in turret on barbette mount , 1941 Model 1 x Twin mount on sides amidships 24 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun Anti-air guns in deck and hoist mounts , 1941 Model 12 x Twin mounts on sides, evenly spread 12 raised mounts 64 - 1.46" / 37.0 mm 60.0 cal guns - 1.70lbs / 0.77kg shells, 240 per gun Breech loading guns in deck mounts , 1941 Model 32 x Twin mounts on sides, evenly spread 24 raised mounts Weight of broadside 62,717 lbs / 62,717 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 19.0" / 483 mm 940.00 ft / 286.51 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 105 % of normal length - Torpedo Bulkhead: 8.00" / 203 mm 940.00 ft / 286.51 m 38.00 ft / 11.58 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 21.0" / 533 mm 14.0" / 356 mm 21.0" / 533 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: 8.00" / 203 mm, Conning tower: 18.00" / 457 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 8 shafts, 306,080 shp / 228,336 Kw = 30.00 kts Range 12,000nm at 15.00 kts Bunker at max displacement = 16,001 tons Complement: 4,416 - 5,742 Cost: £82.442 million / $329.768 million Distribution of weights at normal displacement: Armament: 12,057 tons, 6.6 % Armour: 66,109 tons, 36.2 % - Belts: 12,212 tons, 6.7 % - Torpedo bulkhead: 10,573 tons, 5.8 % - Armament: 12,103 tons, 6.6 % - Armour Deck: 29,972 tons, 16.4 % - Conning Tower: 1,248 tons, 0.7 % Machinery: 8,089 tons, 4.4 % Hull, fittings & equipment: 84,013 tons, 46.0 % Fuel, ammunition & stores: 16,805 tons, 9.2 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 455,012 lbs / 206,390 Kg = 98.3 x 21.0 " / 533 mm shells or 161.9 torpedoes Stability (Unstable if below 1.00): 1.34 Metacentric height 21.2 ft / 6.5 m Roll period: 16.9 seconds Steadiness - As gun platform (Average = 50 %): 64 % - Recoil effect (Restricted arc if above 1.00): 0.33 Seaboat quality (Average = 1.00): 1.27 Hull form characteristics: Hull has a flush deck, a normal bow and small transom stern Block coefficient (normal/deep): 0.642 / 0.647 Length to Beam Ratio: 7.46 : 1 'Natural speed' for length: 42.75 kts Power going to wave formation at top speed: 38 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 9.00 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 %, 42.00 ft / 12.80 m, 35.00 ft / 10.67 m - Forward deck: 30.00 %, 35.00 ft / 10.67 m, 32.00 ft / 9.75 m - Aft deck: 35.00 %, 32.00 ft / 9.75 m, 32.00 ft / 9.75 m - Quarter deck: 15.00 %, 32.00 ft / 9.75 m, 35.00 ft / 10.67 m - Average freeboard: 33.84 ft / 10.31 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 52.9 % - Above water (accommodation/working, high = better): 285.6 % Waterplane Area: 202,515 Square feet or 18,814 Square metres Displacement factor (Displacement / loading): 128 % Structure weight / hull surface area: 341 lbs/sq ft or 1,667 Kg/sq metre Hull strength (Relative): - Cross-sectional: 1.13 - Longitudinal: 0.95 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent Good seaboat, rides out heavy weather easily
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Friday, May 11, 2007
A very large battleship: Ger/BB/1941
I have thought for a long time about very large battleships and battlecruisers with many large guns. I suspect that I need to correct the Ger/CB/1941 design, as I probably have an error. I will just update the previous blog post with the corrected report. I still believe that 24in guns should be feasible, but this version has 12-21in guns in three quadruple turrets. The armour basis is 21 inches. The design is otherwise similar to the Ger/CB/1941, except for having a 30 knot speed and greater size. The ability to survive 161.9 torpedo hits seems bizarre and improbably. I guess that this design tests the limits of Springsharp. This is the Springsharp report:
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