Ger/BB/1905 variant, Germany Battleship laid down 1905 Displacement: 20,360 t light; 21,219 t standard; 23,922 t normal; 26,085 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (585.00 ft / 580.00 ft) x 90.00 ft x (26.60 / 28.58 ft) (178.31 m / 176.78 m) x 27.43 m x (8.11 / 8.71 m) Armament: 8 - 12.00" / 305 mm 45.0 cal guns - 871.00lbs / 395.08kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1905 Model 4 x Twin mounts on centreline ends, evenly spread 2 raised mounts - superfiring 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 12 x Single mounts on sides, evenly spread Weight of broadside 7,355 lbs / 3,336 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 11.0" / 279 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m Ends: 4.00" / 102 mm 170.00 ft / 51.82 m 16.00 ft / 4.88 m 40.00 ft / 12.19 m Unarmoured ends Upper: 8.00" / 203 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m Main Belt covers 98 % of normal length - Torpedo Bulkhead: 2.00" / 51 mm 380.00 ft / 115.82 m 26.60 ft / 8.11 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 11.0" / 279 mm 6.00" / 152 mm 11.0" / 279 mm 2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm - Conning towers: Forward 11.00" / 279 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 43,412 shp / 32,386 Kw = 23.00 kts Range 5,600nm at 15.00 kts Bunker at max displacement = 4,866 tons Complement: 961 - 1,250 Cost: £1.842 million / $7.370 million Distribution of weights at normal displacement: Armament: 1,308 tons, 5.5 % Armour: 7,829 tons, 32.7 % - Belts: 2,871 tons, 12.0 % - Torpedo bulkhead: 748 tons, 3.1 % - Armament: 1,872 tons, 7.8 % - Armour Deck: 2,141 tons, 8.9 % - Conning Tower: 197 tons, 0.8 % Machinery: 3,289 tons, 13.7 % Hull, fittings & equipment: 7,934 tons, 33.2 % Fuel, ammunition & stores: 3,562 tons, 14.9 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 37,217 lbs / 16,881 Kg = 43.1 x 12.0 " / 305 mm shells or 6.0 torpedoes Stability (Unstable if below 1.00): 1.22 Metacentric height 6.1 ft / 1.9 m Roll period: 15.3 seconds Steadiness - As gun platform (Average = 50 %): 78 % - Recoil effect (Restricted arc if above 1.00): 0.55 Seaboat quality (Average = 1.00): 1.56 Hull form characteristics: Hull has rise forward of midbreak, a ram bow and a cruiser stern Block coefficient (normal/deep): 0.603 / 0.612 Length to Beam Ratio: 6.44 : 1 'Natural speed' for length: 24.08 kts Power going to wave formation at top speed: 48 % 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 (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 30.00 %, 27.00 ft / 8.23 m, 25.00 ft / 7.62 m - Forward deck: 32.00 %, 25.00 ft / 7.62 m, 25.00 ft / 7.62 m - Aft deck: 23.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m - Quarter deck: 15.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m - Average freeboard: 22.20 ft / 6.77 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 90.5 % - Above water (accommodation/working, high = better): 164.3 % Waterplane Area: 38,285 Square feet or 3,557 Square metres Displacement factor (Displacement / loading): 115 % Structure weight / hull surface area: 155 lbs/sq ft or 759 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.94 - Longitudinal: 1.63 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate 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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Sunday, October 21, 2007
A Ger/BB/1905 variant design
I had skipped over this, but I thought that I would try this variant design for the Ger/BB/1905 specification. The ship has the forward turret sited further aft and the after turret much closer to the stern than the classic version. This photograph actually has the correct dimensions. The ship was intended to be a 22,000 ton battleship with 8-12in/BLR, 12-4in QF guns and a speed of 23 knots. The lower belt is 11in. This is the Springsharp report:
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