Ger/CB/1905 Fast, Germany Light Battlecruiser laid down 1905 (Engine 1923) Displacement: 18,384 t light; 19,004 t standard; 20,886 t normal; 22,392 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (707.00 ft / 700.00 ft) x 80.00 ft x (24.40 / 25.77 ft) (215.49 m / 213.36 m) x 24.38 m x (7.44 / 7.85 m) Armament: 4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1905 Model 2 x Twin mounts on centreline ends, evenly spread 12 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun Quick firing guns in casemate mounts, 1905 Model 6 x Single mounts on sides, forward deck aft 6 x Single mounts on sides, aft deck forward Weight of broadside 3,787 lbs / 1,718 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 4.00" / 102 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m Ends: Unarmoured Upper: 3.00" / 76 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m Main Belt covers 97 % of normal length Main belt does not fully cover magazines and engineering spaces - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm 2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armoured deck - multiple decks: For and Aft decks: 3.00" / 76 mm Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm - Conning towers: Forward 9.00" / 229 mm, Aft 4.00" / 102 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 185,595 shp / 138,454 Kw = 35.00 kts Range 6,500nm at 17.00 kts Bunker at max displacement = 3,388 tons Complement: 868 - 1,129 Cost: £1.856 million / $7.424 million Distribution of weights at normal displacement: Armament: 689 tons, 3.3 % - Guns: 689 tons, 3.3 % Armour: 3,897 tons, 18.7 % - Belts: 1,032 tons, 4.9 % - Armament: 498 tons, 2.4 % - Armour Deck: 2,154 tons, 10.3 % - Conning Towers: 212 tons, 1.0 % Machinery: 6,203 tons, 29.7 % Hull, fittings & equipment: 7,596 tons, 36.4 % Fuel, ammunition & stores: 2,502 tons, 12.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 21,714 lbs / 9,849 Kg = 25.1 x 12.0 " / 305 mm shells or 2.0 torpedoes Stability (Unstable if below 1.00): 1.30 Metacentric height 5.8 ft / 1.8 m Roll period: 14.0 seconds Steadiness - As gun platform (Average = 50 %): 53 % - Recoil effect (Restricted arc if above 1.00): 0.29 Seaboat quality (Average = 1.00): 1.07 Hull form characteristics: Hull has rise forward of midbreak, a ram bow and a cruiser stern Block coefficient (normal/deep): 0.535 / 0.543 Length to Beam Ratio: 8.75 : 1 'Natural speed' for length: 26.46 kts Power going to wave formation at top speed: 60 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): -3.00 degrees Stern overhang: -2.00 ft / -0.61 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 32.00 %, 32.00 ft / 9.75 m, 28.00 ft / 8.53 m - Forward deck: 30.00 %, 28.00 ft / 8.53 m, 27.00 ft / 8.23 m - Aft deck: 23.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Quarter deck: 15.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Average freeboard: 24.94 ft / 7.60 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 111.3 % - Above water (accommodation/working, high = better): 201.4 % Waterplane Area: 38,537 Square feet or 3,580 Square metres Displacement factor (Displacement / loading): 107 % Structure weight / hull surface area: 133 lbs/sq ft or 650 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.48 - Overall: 1.00 Cramped machinery, storage, compartmentation space Excellent accommodation and workspace room
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Friday, May 29, 2009
A fast version of the Ger/CB/1905
The Ger/CB/1905 design is the classic light battlecruiser type. The design in anachronistic and looks British, but it works well. I wanted to see how much speed I could achieve with it, and the answer is that I could get 35 knots without a lot of trouble. Of course, it relies on very light machinery:
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