Ger/BB/1907 Design Study A1, Germany Battleship laid down 1907 Displacement: 24,685 t light; 25,871 t standard; 27,398 t normal; 28,618 t full load Dimensions: Length overall / water x beam x draught 580.00 ft / 580.00 ft x 100.00 ft x 33.00 ft (normal load) 176.78 m / 176.78 m x 30.48 m x 10.06 m Armament: 15 - 11.00" / 279 mm guns (5 mounts), 665.50lbs / 301.87kg shells, 1907 Model Breech loading guns in turrets (on barbettes) on centreline, evenly spread, 11 raised guns 12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model Quick firing guns in casemate mounts on side, evenly spread, 6 raised mounts 6 guns in hull casemates - Limited use in heavy seas Weight of broadside 11,279 lbs / 5,116 kg Shells per gun, main battery: 100 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 12.0" / 305 mm 376.00 ft / 114.60 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 100 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 2.00" / 51 mm 375.00 ft / 114.30 m 28.00 ft / 8.53 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 11.0" / 279 mm 6.00" / 152 mm 10.0" / 254 mm 2nd: 6.00" / 152 mm 4.00" / 102 mm 4.00" / 102 mm - Armour deck: 2.50" / 64 mm, Conning tower: 9.00" / 229 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 63,228 shp / 47,168 Kw = 25.00 kts Range 5,400nm at 12.00 kts Bunker at max displacement = 2,747 tons Complement: 1,064 - 1,384 Cost: £2.551 million / $10.205 million Distribution of weights at normal displacement: Armament: 1,410 tons, 5.1 % Armour: 8,942 tons, 32.6 % - Belts: 3,167 tons, 11.6 % - Torpedo bulkhead: 777 tons, 2.8 % - Armament: 3,032 tons, 11.1 % - Armour Deck: 1,789 tons, 6.5 % - Conning Tower: 176 tons, 0.6 % Machinery: 3,593 tons, 13.1 % Hull, fittings & equipment: 10,741 tons, 39.2 % Fuel, ammunition & stores: 2,713 tons, 9.9 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 32,510 lbs / 14,746 Kg = 48.9 x 11.0 " / 279 mm shells or 5.2 torpedoes Stability (Unstable if below 1.00): 1.01 Metacentric height 5.1 ft / 1.6 m Roll period: 18.5 seconds Steadiness - As gun platform (Average = 50 %): 67 % - Recoil effect (Restricted arc if above 1.00): 0.69 Seaboat quality (Average = 1.00): 1.34 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.501 Length to Beam Ratio: 5.80 : 1 'Natural speed' for length: 24.08 kts Power going to wave formation at top speed: 52 % 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: 28.00 ft / 8.53 m - Forecastle (20 %): 28.00 ft / 8.53 m - Mid (43 %): 28.00 ft / 8.53 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: 23.44 ft / 7.14 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 101.9 % - Above water (accommodation/working, high = better): 158.1 % Waterplane Area: 38,679 Square feet or 3,593 Square metres Displacement factor (Displacement / loading): 100 % Structure weight / hull surface area: 189 lbs/sq ft or 922 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.92 - Longitudinal: 2.21 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent Good seaboat, rides out heavy weather easily
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Tuesday, January 11, 2005
This is another odd result: the Ger/BB/1907 Design Study A1
I have this Italian-looking German battleship design. I'm calling it the Ger/BB/1907 Design Study A1. The ship has 15-11in/45 guns (43 tons). That is the main feature of the ship. I had only allowed for 20 knots, but in Springsharp, I got 25 knots on a smaller displacement. Not only that, it is a good seaboat:
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