Ger/BB/1917, Germany Battleship laid down 1917 (Engine 1927) Displacement: 96,451 t light; 100,375 t standard; 105,000 t normal; 108,700 t full load Dimensions: Length overall / water x beam x draught 1,089.24 ft / 1,085.00 ft x 140.00 ft x 34.00 ft (normal load) 332.00 m / 330.71 m x 42.67 m x 10.36 m Armament: 9 - 19.75" / 502 mm guns (3x3 guns), 3,851.87lbs / 1,747.18kg shells, 1917 Model Breech loading guns in turrets (on barbettes) on centreline ends, majority forward, 1 raised mount - superfiring 24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1917 Model Quick firing guns in turrets (on barbettes) on side, all amidships, 4 raised mounts - superfiring Weight of broadside 36,167 lbs / 16,405 kg Shells per gun, main battery: 90 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 18.0" / 457 mm 650.00 ft / 198.12 m 17.00 ft / 5.18 m Ends: Unarmoured Main Belt covers 92 % of normal length - Torpedo Bulkhead: 7.00" / 178 mm 650.00 ft / 198.12 m 33.00 ft / 10.06 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: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm - Armour deck: 7.00" / 178 mm, Conning tower: 18.00" / 457 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 280,433 shp / 209,203 Kw = 30.70 kts Range 7,500nm at 15.00 kts Bunker at max displacement = 8,326 tons Complement: 2,916 - 3,791 Cost: £15.296 million / $61.183 million Distribution of weights at normal displacement: Armament: 4,521 tons, 4.3 % Armour: 38,388 tons, 36.6 % - Belts: 8,702 tons, 8.3 % - Torpedo bulkhead: 5,556 tons, 5.3 % - Armament: 7,337 tons, 7.0 % - Armour Deck: 15,930 tons, 15.2 % - Conning Tower: 863 tons, 0.8 % Machinery: 8,852 tons, 8.4 % Hull, fittings & equipment: 44,690 tons, 42.6 % Fuel, ammunition & stores: 8,549 tons, 8.1 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 182,463 lbs / 82,764 Kg = 47.4 x 19.8 " / 502 mm shells or 40.4 torpedoes Stability (Unstable if below 1.00): 1.25 Metacentric height 12.4 ft / 3.8 m Roll period: 16.7 seconds Steadiness - As gun platform (Average = 50 %): 58 % - Recoil effect (Restricted arc if above 1.00): 0.43 Seaboat quality (Average = 1.00): 1.16 Hull form characteristics: Hull has a flush deck Block coefficient: 0.712 Length to Beam Ratio: 7.75 : 1 'Natural speed' for length: 32.94 kts Power going to wave formation at top speed: 47 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 4.00 degrees Stern overhang: 2.00 ft / 0.61 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 32.00 ft / 9.75 m - Forecastle (20 %): 26.00 ft / 7.92 m - Mid (50 %): 26.00 ft / 7.92 m - Quarterdeck (15 %): 26.00 ft / 7.92 m - Stern: 26.00 ft / 7.92 m - Average freeboard: 26.48 ft / 8.07 m Ship tends to be wet forward Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 70.2 % - Above water (accommodation/working, high = better): 208.9 % Waterplane Area: 123,010 Square feet or 11,428 Square metres Displacement factor (Displacement / loading): 114 % Structure weight / hull surface area: 285 lbs/sq ft or 1,391 Kg/sq metre Hull strength (Relative): - Cross-sectional: 1.19 - Longitudinal: 0.94 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent
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Monday, May 15, 2006
A 105,000 ton battleship design
The next page in the Red Book is a set of specifications, although incomplete, for a 105,000 ton German battleship. Germany is not mentioned, but I believe that there is, elsewhere, a sketch that mentions that fact. The armament is 9-19.75in guns, and I assumed a 24-5in QF gun secondary armament. The only other thing that I worked to achieve was the 280,000 SHP machinery. I had hoped for 31 knots for that power, but Springsharp gave me 30.7 knots, instead, which is quite good, given how I had estimated the power back in the early 1970's. This is the Springsharp report:
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