GB/CB/1905 design study C1, Great Britain Battlecruiser laid down 1905 Displacement: 29,611 t light; 30,692 t standard; 35,293 t normal; 38,973 t full load Dimensions: Length overall / water x beam x draught 770.00 ft / 770.00 ft x 85.00 ft x 27.00 ft (normal load) 234.70 m / 234.70 m x 25.91 m x 8.23 m Armament: 8 - 12.00" / 305 mm guns (3 mounts), 864.00lbs / 391.90kg shells, 1905 Model Breech loading guns in turrets (on barbettes) on centreline ends, majority forward, all raised mounts - superfiring Main guns limited to end-on fire 12 - 6.00" / 152 mm guns (9 mounts), 108.00lbs / 48.99kg shells, 1905 Model Quick firing guns in deck mounts on side, evenly spread, all raised mounts Weight of broadside 8,208 lbs / 3,723 kg Shells per gun, main battery: 80 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 6.00" / 152 mm 500.00 ft / 152.40 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 100 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.50" / 38 mm 500.00 ft / 152.40 m 23.00 ft / 7.01 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 10.0" / 254 mm 4.00" / 102 mm 8.00" / 203 mm 2nd: 2.00" / 51 mm - - - Armour deck: 2.50" / 64 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 107,644 shp / 80,303 Kw = 28.00 kts Range 7,500nm at 15.00 kts Bunker at max displacement = 8,282 tons Complement: 1,286 - 1,673 Cost: £3.040 million / $12.160 million Distribution of weights at normal displacement: Armament: 1,026 tons, 2.9 % Armour: 7,132 tons, 20.2 % - Belts: 2,032 tons, 5.8 % - Torpedo bulkhead: 638 tons, 1.8 % - Armament: 2,038 tons, 5.8 % - Armour Deck: 2,424 tons, 6.9 % - Conning Tower: 0 tons, 0.0 % Machinery: 8,155 tons, 23.1 % Hull, fittings & equipment: 13,299 tons, 37.7 % Fuel, ammunition & stores: 5,681 tons, 16.1 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 44,112 lbs / 20,009 Kg = 51.1 x 12.0 " / 305 mm shells or 4.4 torpedoes Stability (Unstable if below 1.00): 1.11 Metacentric height 4.8 ft / 1.5 m Roll period: 16.3 seconds Steadiness - As gun platform (Average = 50 %): 86 % - Recoil effect (Restricted arc if above 1.00): 1.16 Seaboat quality (Average = 1.00): 1.72 Hull form characteristics: Hull has raised forecastle, rise forward of midbreak Block coefficient: 0.699 Length to Beam Ratio: 9.06 : 1 'Natural speed' for length: 27.75 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: 37.00 ft / 11.28 m - Forecastle (20 %): 34.00 ft / 10.36 m (33.00 ft / 10.06 m aft of break) - Mid (73 %): 32.00 ft / 9.75 m (22.00 ft / 6.71 m aft of break) - Quarterdeck (15 %): 22.00 ft / 6.71 m - Stern: 22.00 ft / 6.71 m - Average freeboard: 30.21 ft / 9.21 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 126.6 % - Above water (accommodation/working, high = better): 237.3 % Waterplane Area: 52,413 Square feet or 4,869 Square metres Displacement factor (Displacement / loading): 112 % Structure weight / hull surface area: 163 lbs/sq ft or 794 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.42 - 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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Saturday, January 15, 2005
Frank Fox had argued for a armament of 8-12in guns
I just tried out an 8-12in gunned GB/CB/1905 with a 6in belt. The best speed I could get was 28 knots. The size is 35,293, normal displacement. By adjusting dimensions, I could probably do better. Hull strength is the issue. I am sure that my friend Cliff would really enjoy trying out Springsharp.
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