Ger/CB/1912, Germany Battlecruiser laid down 1912 (Engine 1937) Displacement: 35,706 t light; 36,996 t standard; 39,750 t normal; 41,953 t full load Dimensions: Length overall / water x beam x draught 822.00 ft / 820.00 ft x 105.00 ft x 33.00 ft (normal load) 250.55 m / 249.94 m x 32.00 m x 10.06 m Armament: 6 - 15.00" / 381 mm guns (2x3 guns), 1,687.50lbs / 765.44kg shells, 1912 Model Breech loading guns in turrets (on barbettes) on centreline, all forward, 1 raised mount - superfiring 8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model Quick firing guns in deck mounts with hoists on side, all forward, 2 raised mounts - superfiring Weight of broadside 10,989 lbs / 4,985 kg Shells per gun, main battery: 80 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 6.00" / 152 mm 560.00 ft / 170.69 m 17.00 ft / 5.18 m Ends: Unarmoured Main Belt covers 105 % of normal length - Torpedo Bulkhead: 2.00" / 51 mm 560.00 ft / 170.69 m 28.00 ft / 8.53 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 10.0" / 254 mm 6.00" / 152 mm 10.0" / 254 mm 2nd: 2.00" / 51 mm - - - Armour deck: 5.00" / 127 mm, Conning tower: 8.00" / 203 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 256,152 shp / 191,089 Kw = 35.00 kts Range 6,500nm at 18.00 kts Bunker at max displacement = 4,957 tons Complement: 1,406 - 1,829 Cost: £3.397 million / $13.590 million Distribution of weights at normal displacement: Armament: 1,374 tons, 3.5 % Armour: 10,935 tons, 27.5 % - Belts: 2,407 tons, 6.1 % - Torpedo bulkhead: 1,160 tons, 2.9 % - Armament: 1,910 tons, 4.8 % - Armour Deck: 5,257 tons, 13.2 % - Conning Tower: 201 tons, 0.5 % Machinery: 7,100 tons, 17.9 % Hull, fittings & equipment: 16,298 tons, 41.0 % Fuel, ammunition & stores: 4,044 tons, 10.2 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 53,097 lbs / 24,084 Kg = 31.5 x 15.0 " / 381 mm shells or 7.1 torpedoes Stability (Unstable if below 1.00): 1.18 Metacentric height 7.4 ft / 2.2 m Roll period: 16.3 seconds Steadiness - As gun platform (Average = 50 %): 55 % - Recoil effect (Restricted arc if above 1.00): 0.46 Seaboat quality (Average = 1.00): 1.10 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.490 Length to Beam Ratio: 7.81 : 1 'Natural speed' for length: 28.64 kts Power going to wave formation at top speed: 56 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 0.00 degrees Stern overhang: 2.00 ft / 0.61 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 35.00 ft / 10.67 m - Forecastle (20 %): 30.00 ft / 9.14 m - Mid (59 %): 30.00 ft / 9.14 m (20.00 ft / 6.10 m aft of break) - Quarterdeck (15 %): 20.00 ft / 6.10 m - Stern: 20.00 ft / 6.10 m - Average freeboard: 26.30 ft / 8.02 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 103.7 % - Above water (accommodation/working, high = better): 200.2 % Waterplane Area: 56,832 Square feet or 5,280 Square metres Displacement factor (Displacement / loading): 110 % Structure weight / hull surface area: 194 lbs/sq ft or 947 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.95 - Longitudinal: 1.58 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent
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Sunday, July 03, 2005
The higher power output version of the Ger/CB/1912 design can make 35 knots
The more radical recasting of the Ger/CB/1912 design can make 35 knots. I had thought that I would use 40 SHP/ton of machinery weight, although this is not that light, although it is 36 SHP/ton. To keep from having to balloon the displacement too much, I increased the draught, as this is a relatively cheap way to increase strength in Springsharp. This is the revised Springsharp report:
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