GB/CB/1907 Design E-5 Dec 1906, Great Britain Battlecruiser laid down 1907 Displacement: 18,350 t light; 19,190 t standard; 22,400 t normal; 24,968 t full load Dimensions: Length overall / water x beam x draught 590.00 ft / 590.00 ft x 83.00 ft x 27.00 ft (normal load) 179.83 m / 179.83 m x 25.30 m x 8.23 m Armament: 4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1907 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread 4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1907 Model Breech loading guns in turrets (on barbettes) on side, all amidships 16 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model Quick firing guns in casemate mounts on side, evenly spread, 8 raised mounts Weight of broadside 7,424 lbs / 3,367 kg Shells per gun, main battery: 90 5 - 18.0" / 457.2 mm submerged torpedo tubes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 9.00" / 229 mm 390.00 ft / 118.87 m 8.00 ft / 2.44 m Ends: 4.00" / 102 mm 80.00 ft / 24.38 m 8.00 ft / 2.44 m 120.00 ft / 36.58 m Unarmoured ends Upper: 5.00" / 127 mm 390.00 ft / 118.87 m 8.00 ft / 2.44 m Main Belt covers 102 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.50" / 38 mm 390.00 ft / 118.87 m 27.00 ft / 8.23 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm 2nd: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm 3rd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm Machinery: Coal fired boilers, steam turbines, Direct drive, 4 shafts, 56,375 shp / 42,056 Kw = 25.00 kts Range 5,700nm at 15.00 kts Bunker at max displacement = 5,778 tons (100% coal) Complement: 915 - 1,190 Cost: £1.915 million / $7.660 million Distribution of weights at normal displacement: Armament: 928 tons, 4.1 % Armour: 5,692 tons, 25.4 % - Belts: 1,978 tons, 8.8 % - Torpedo bulkhead: 584 tons, 2.6 % - Armament: 1,659 tons, 7.4 % - Armour Deck: 1,316 tons, 5.9 % - Conning Tower: 154 tons, 0.7 % Machinery: 3,523 tons, 15.7 % Hull, fittings & equipment: 8,206 tons, 36.6 % Fuel, ammunition & stores: 4,050 tons, 18.1 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 29,018 lbs / 13,162 Kg = 33.6 x 12.0 " / 305 mm shells or 4.0 torpedoes Stability (Unstable if below 1.00): 1.18 Metacentric height 5.1 ft / 1.6 m Roll period: 15.4 seconds Steadiness - As gun platform (Average = 50 %): 73 % - Recoil effect (Restricted arc if above 1.00): 0.64 Seaboat quality (Average = 1.00): 1.45 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.593 Length to Beam Ratio: 7.11 : 1 'Natural speed' for length: 24.29 kts Power going to wave formation at top speed: 51 % 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 (68 %): 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: 22.68 ft / 6.91 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 112.7 % - Above water (accommodation/working, high = better): 169.7 % Waterplane Area: 35,581 Square feet or 3,306 Square metres Displacement factor (Displacement / loading): 111 % Structure weight / hull surface area: 155 lbs/sq ft or 758 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.94 - Longitudinal: 1.76 - 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 Good seaboat, rides out heavy weather easily
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Friday, October 27, 2006
The GB/CB/1907 Design E from 5 December 1906
Design E would have been a very good ship, as were some of the earlier versions. Design E had a 9in armour basis and had a maximum speed of 25 knots. The armament was the usual 8-12in guns and 16-4in QF guns. Design E would have been more costly, as the design displacement was 21,400 tons. This is the Springsharp report:
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