Ger/CA/1906, Germany Armoured Cruiser laid down 1906 Displacement: 15,742 t light; 16,379 t standard; 18,100 t normal; 19,476 t full load Dimensions: Length overall / water x beam x draught 550.00 ft / 550.00 ft x 80.00 ft x 26.00 ft (normal load) 167.64 m / 167.64 m x 24.38 m x 7.92 m Armament: 6 - 12.00" / 305 mm guns (2x3 guns), 864.00lbs / 391.90kg shells, 1906 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread 8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1906 Model Quick firing guns in casemate mounts on side, evenly spread 8 guns in hull casemates - Limited use in heavy seas Weight of broadside 6,048 lbs / 2,743 kg Shells per gun, main battery: 80 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 6.00" / 152 mm 420.00 ft / 128.02 m 16.00 ft / 4.88 m Ends: 4.00" / 102 mm 130.00 ft / 39.62 m 12.00 ft / 3.66 m Main Belt covers 117 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.60" / 41 mm 420.00 ft / 128.02 m 23.00 ft / 7.01 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 8.00" / 203 mm 4.00" / 102 mm 6.00" / 152 mm 2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armour deck: 3.00" / 76 mm, Conning tower: 6.00" / 152 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 50,110 shp / 37,382 Kw = 25.00 kts Range 4,500nm at 15.00 kts Bunker at max displacement = 3,097 tons Complement: 779 - 1,014 Cost: £1.642 million / $6.566 million Distribution of weights at normal displacement: Armament: 756 tons, 4.2 % Armour: 5,071 tons, 28.0 % - Belts: 1,917 tons, 10.6 % - Torpedo bulkhead: 572 tons, 3.2 % - Armament: 782 tons, 4.3 % - Armour Deck: 1,710 tons, 9.4 % - Conning Tower: 89 tons, 0.5 % Machinery: 3,254 tons, 18.0 % Hull, fittings & equipment: 6,662 tons, 36.8 % Fuel, ammunition & stores: 2,358 tons, 13.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 24,208 lbs / 10,980 Kg = 28.0 x 12.0 " / 305 mm shells or 3.4 torpedoes Stability (Unstable if below 1.00): 1.24 Metacentric height 5.3 ft / 1.6 m Roll period: 14.6 seconds Steadiness - As gun platform (Average = 50 %): 78 % - Recoil effect (Restricted arc if above 1.00): 0.60 Seaboat quality (Average = 1.00): 1.56 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.554 Length to Beam Ratio: 6.88 : 1 'Natural speed' for length: 23.45 kts Power going to wave formation at top speed: 52 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): -2.00 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 %): 26.00 ft / 7.92 m - Mid (67 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break) - Quarterdeck (15 %): 18.00 ft / 5.49 m - Stern: 18.00 ft / 5.49 m - Average freeboard: 23.52 ft / 7.17 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 119.4 % - Above water (accommodation/working, high = better): 179.2 % Waterplane Area: 30,816 Square feet or 2,863 Square metres Displacement factor (Displacement / loading): 103 % Structure weight / hull surface area: 142 lbs/sq ft or 691 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.92 - Longitudinal: 2.11 - Overall: 1.00 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent Ship has slow, easy roll, a good, steady gun platform Excellent seaboat, comfortable, can fire her guns in the heaviest weather
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Monday, July 04, 2005
German Armoured Cruiser: Ger/CA/1906
The date is just guesswork, but the ship otherwise matches that period, except for triple turrets. This is a ship of 550ft x 80ft x 26ft with 6-12in/45 BLR and 8-6in QF guns. The 6in guns are in barbettes. The 12in guns are in two triple turrets, one forward and one aft. The armour basis is 6in with a 3in deck. The thick deck armour caused the displacement to be greater than planned: 18,100 tons normal rather than 16,860 tons. The speed is 25 knots, so it is almost a battlecruiser. This is the Springsharp report:
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