Centurion-modernized, Great Britain Battleship laid down 1938 Displacement: 27,259 t light; 28,432 t standard; 29,760 t normal; 30,822 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (604.50 ft / 597.50 ft) x 89.00 ft (Bulges 104.00 ft) x (29.00 / 29.98 ft) (184.25 m / 182.12 m) x 27.13 m (Bulges 31.70 m) x (8.84 / 9.14 m) Armament: 8 - 13.50" / 343 mm 45.0 cal guns - 1,240.68lbs / 562.76kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1938 Model 8 x Twin mounts on centreline ends, evenly spread 2 raised mounts - superfiring 20 - 4.50" / 114 mm 45.0 cal guns - 45.95lbs / 20.84kg shells, 150 per gun Dual purpose guns in deck and hoist mounts, 1938 Model 6 x Twin mounts on sides, forward deck aft 4 x Twin mounts on sides, aft deck forward 32 - 1.57" / 40.0 mm 45.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun Anti-air guns in deck mounts, 1938 Model 8 x 2 row quad mounts on sides, evenly spread 8 raised mounts Weight of broadside 10,908 lbs / 4,948 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 12.0" / 305 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m Ends: 5.00" / 127 mm 150.00 ft / 45.72 m 12.00 ft / 3.66 m 7.50 ft / 2.29 m Unarmoured ends Upper: 9.00" / 229 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m Main Belt covers 113 % of normal length - Torpedo Bulkhead: 4.00" / 102 mm 440.00 ft / 134.11 m 29.00 ft / 8.84 m - Hull Bulges: 1.00" / 25 mm 440.00 ft / 134.11 m 29.00 ft / 8.84 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 12.0" / 305 mm 9.00" / 229 mm 12.0" / 305 mm 2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm - Armoured deck - multiple decks: 5.00" / 127 mm For and Aft decks Forecastle: 5.00" / 127 mm Quarter deck: 5.00" / 127 mm - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 93,477 shp / 69,734 Kw = 27.00 kts Range 5,400nm at 15.00 kts Bunker at max displacement = 2,389 tons Complement: 1,132 - 1,472 Cost: £13.134 million / $52.536 million Distribution of weights at normal displacement: Armament: 1,934 tons, 6.5 % Armour: 12,870 tons, 43.2 % - Belts: 3,439 tons, 11.6 % - Torpedo bulkhead: 1,888 tons, 6.3 % - Bulges: 472 tons, 1.7 % - Armament: 3,334 tons, 11.2 % - Armour Deck: 3,550 tons, 11.9 % - Conning Tower: 186 tons, 0.6 % Machinery: 2,560 tons, 8.6 % Hull, fittings & equipment: 9,895 tons, 33.3 % Fuel, ammunition & stores: 2,501 tons, 8.4 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 51,396 lbs / 23,313 Kg = 41.8 x 13.5 " / 343 mm shells or 11.0 torpedoes Stability (Unstable if below 1.00): 1.18 Metacentric height 5.7 ft / 1.7 m Roll period: 18.3 seconds Steadiness - As gun platform (Average = 50 %): 55 % - Recoil effect (Restricted arc if above 1.00): 0.49 Seaboat quality (Average = 1.00): 1.11 Hull form characteristics: Hull has rise forward of midbreak, a ram bow and a cruiser stern Block coefficient (normal/deep): 0.578 / 0.579 Length to Beam Ratio: 5.75 : 1 'Natural speed' for length: 24.44 kts Power going to wave formation at top speed: 57 % 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 (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 30.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m - Forward deck: 37.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m - Aft deck: 18.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Quarter deck: 15.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Average freeboard: 24.36 ft / 7.42 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 76.6 % - Above water (accommodation/working, high = better): 156.3 % Waterplane Area: 38,100 Square feet or 3,540 Square metres Displacement factor (Displacement / loading): 108 % Structure weight / hull surface area: 179 lbs/sq ft or 876 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.94 - Longitudinal: 1.80 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent
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Thursday, October 18, 2007
How about a modernized Centurion battleship?
This is not an original idea, but when I heard about this, I was interested. I did this unencumbered by a drawing or details, but this at least seems plausible. I tried a modernized version of the battleship Centurion, updated somewhat similar to the Queen Elizabeth class, except faster. I removed the center turret, so the armament becomes 8-13.5in/45 BLR, 20-4.5in DP, and 32-2pdr AA guns. The armour basis is 12in with a 5in deck. The ship is bulged to 104ft and has a 4in torpedo bulkhead and 1in in the bulges (whatever that means to Springsharp). I have omitted aircraft, which you might want to add. To be able to have DP guns, Springsharp requires that the laid down date be moved up, as you are not allowed to use them on a 1911 ship. This is the Springsharp report:
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Hi Jim,
Yes something like that I was aiming at...they would have been useful I think in 1940 but still did not have the speed of the German pocket battleships..thanks for sharing that report.
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