Ger/BB/1905, Germany Battleship laid down 1905 Displacement: 20,998 t light; 21,870 t standard; 25,100 t normal; 27,684 t full load Dimensions: Length overall / water x beam x draught 580.00 ft / 580.00 ft x 90.00 ft x 26.60 ft (normal load) 176.78 m / 176.78 m x 27.43 m x 8.11 m Armament: 8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1905 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring 12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model Quick firing guns in casemate mounts on side, all amidships Weight of broadside 7,296 lbs / 3,309 kg Shells per gun, main battery: 90 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 10.0" / 254 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m Ends: 4.00" / 102 mm 130.00 ft / 39.62 m 8.00 ft / 2.44 m 80.00 ft / 24.38 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 370.00 ft / 112.78 m 26.00 ft / 7.92 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 11.0" / 279 mm 8.00" / 203 mm 11.0" / 279 mm 2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armour deck: 3.00" / 76 mm, Conning tower: 11.00" / 279 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 45,227 shp / 33,739 Kw = 23.00 kts Range 6,500nm at 15.00 kts Bunker at max displacement = 5,814 tons Complement: 996 - 1,296 Cost: £1.981 million / $7.923 million Distribution of weights at normal displacement: Armament: 912 tons, 3.6 % Armour: 7,782 tons, 31.0 % - Belts: 2,496 tons, 9.9 % - Torpedo bulkhead: 712 tons, 2.8 % - Armament: 2,187 tons, 8.7 % - Armour Deck: 2,184 tons, 8.7 % - Conning Tower: 203 tons, 0.8 % Machinery: 3,426 tons, 13.7 % Hull, fittings & equipment: 8,878 tons, 35.4 % Fuel, ammunition & stores: 4,102 tons, 16.3 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 38,109 lbs / 17,286 Kg = 44.1 x 12.0 " / 305 mm shells or 5.9 torpedoes Stability (Unstable if below 1.00): 1.12 Metacentric height 5.3 ft / 1.6 m Roll period: 16.4 seconds Steadiness - As gun platform (Average = 50 %): 80 % - Recoil effect (Restricted arc if above 1.00): 0.64 Seaboat quality (Average = 1.00): 1.60 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.633 Length to Beam Ratio: 6.44 : 1 'Natural speed' for length: 24.08 kts Power going to wave formation at top speed: 49 % 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: 29.00 ft / 8.84 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: 23.60 ft / 7.19 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 92.6 % - Above water (accommodation/working, high = better): 179.0 % Waterplane Area: 39,356 Square feet or 3,656 Square metres Displacement factor (Displacement / loading): 114 % Structure weight / hull surface area: 158 lbs/sq ft or 771 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.95 - Longitudinal: 1.73 - 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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Monday, July 31, 2006
From the original high-level specification for the Ger/BB/1905 in the Blue Book
We have finished a pass through the Red Book and I am now going through the Blue Book. I am starting with the original high level specifications for the ships in the German 1905 building program. The first are the four battleships to be built in 1905, which were 580ft x 90ft x 26.6ft, with a Standard displacement of 22,000 tons, 8-12in/45 BLR and 12-4in QF guns. The belt is specified to be 10in. The speed wanted is 23 knots. I am using normal weight machinery. All boilers are oil-fired. This is the Springsharp report:
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