GB/CB/1912, Great Britain Battlecruiser laid down 1912 Displacement: 28,447 t light; 29,872 t standard; 32,500 t normal; 34,602 t full load Dimensions: Length overall / water x beam x draught 765.00 ft / 765.00 ft x 94.00 ft x 27.00 ft (normal load) 233.17 m / 233.17 m x 28.65 m x 8.23 m Armament: 8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring 16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model Quick firing guns in casemate mounts on side, all amidships 12 guns in hull casemates - Limited use in heavy seas Weight of broadside 15,228 lbs / 6,907 kg Shells per gun, main battery: 90 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 9.00" / 229 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m Ends: 4.00" / 102 mm 280.00 ft / 85.34 m 8.00 ft / 2.44 m Upper: 6.00" / 152 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m Main Belt covers 98 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.50" / 38 mm 485.00 ft / 147.83 m 27.00 ft / 8.23 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 9.00" / 229 mm 7.00" / 178 mm 9.00" / 229 mm 2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm - Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 114,576 shp / 85,474 Kw = 29.00 kts Range 6,500nm at 15.00 kts Bunker at max displacement = 4,730 tons Complement: 1,209 - 1,573 Cost: £3.234 million / $12.937 million Distribution of weights at normal displacement: Armament: 1,904 tons, 5.9 % Armour: 8,209 tons, 25.3 % - Belts: 2,822 tons, 8.7 % - Torpedo bulkhead: 727 tons, 2.2 % - Armament: 2,542 tons, 7.8 % - Armour Deck: 1,920 tons, 5.9 % - Conning Tower: 197 tons, 0.6 % Machinery: 4,568 tons, 14.1 % Hull, fittings & equipment: 13,766 tons, 42.4 % Fuel, ammunition & stores: 4,053 tons, 12.5 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 39,535 lbs / 17,933 Kg = 23.4 x 15.0 " / 381 mm shells or 5.0 torpedoes Stability (Unstable if below 1.00): 1.14 Metacentric height 5.8 ft / 1.8 m Roll period: 16.4 seconds Steadiness - As gun platform (Average = 50 %): 57 % - Recoil effect (Restricted arc if above 1.00): 0.80 Seaboat quality (Average = 1.00): 1.15 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.586 Length to Beam Ratio: 8.14 : 1 'Natural speed' for length: 27.66 kts Power going to wave formation at top speed: 50 % 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 %): 25.00 ft / 7.62 m - Mid (67 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break) - Quarterdeck (15 %): 17.00 ft / 5.18 m - Stern: 17.00 ft / 5.18 m - Average freeboard: 22.60 ft / 6.89 m Ship tends to be wet forward Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 113.6 % - Above water (accommodation/working, high = better): 186.3 % Waterplane Area: 51,903 Square feet or 4,822 Square metres Displacement factor (Displacement / loading): 100 % Structure weight / hull surface area: 188 lbs/sq ft or 920 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.99 - Longitudinal: 1.10 - Overall: 1.00 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Monday, October 23, 2006
My attempt at a battlecruiser analog to the Queen Elizabeth class
The initial plan was to build a battlecruiser in 1912 to go with the battleships to be built. In the event, only the four battleships were built, with a fifth funded by Malaya. This is my concept of what a battlecruiser laid down in 1912, with 8-15in BLR and 16-6in QF guns, with a 9in armour basis and a 29 knot speed might be like:
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