US/BB/1914, United States Battleship laid down 1914 Displacement: 28,781 t light; 30,331 t standard; 32,600 t normal; 34,415 t full load Dimensions: Length overall / water x beam x draught 600.00 ft / 600.00 ft x 96.00 ft x 29.00 ft (normal load) 182.88 m / 182.88 m x 29.26 m x 8.84 m Armament: 12 - 14.00" / 356 mm guns (4x3 guns), 1,372.00lbs / 622.33kg shells, 1914 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring Main guns limited to end-on fire 16 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1914 Model Quick firing guns in casemate mounts on side, all amidships, 4 raised mounts - superfiring 4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1914 Model Anti-aircraft guns in deck mounts with hoists on side, all amidships, all raised mounts - superfiring Weight of broadside 17,714 lbs / 8,035 kg Shells per gun, main battery: 90 10 - 21.0" / 533.4 mm above water torpedoes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 13.0" / 330 mm 390.00 ft / 118.87 m 17.00 ft / 5.18 m Ends: Unarmoured Main Belt covers 100 % of normal length - Torpedo Bulkhead: 4.00" / 102 mm 390.00 ft / 118.87 m 28.00 ft / 8.53 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 13.0" / 330 mm 9.00" / 229 mm 13.0" / 330 mm 2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm - Armour deck: 4.00" / 102 mm, Conning tower: 13.00" / 330 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 37,714 shp / 28,135 Kw = 21.00 kts Range 6,000nm at 15.00 kts Bunker at max displacement = 4,083 tons Complement: 1,212 - 1,576 Cost: £3.908 million / $15.633 million Distribution of weights at normal displacement: Armament: 2,214 tons, 6.8 % Armour: 12,595 tons, 38.6 % - Belts: 3,803 tons, 11.7 % - Torpedo bulkhead: 1,616 tons, 5.0 % - Armament: 3,525 tons, 10.8 % - Armour Deck: 3,365 tons, 10.3 % - Conning Tower: 286 tons, 0.9 % Machinery: 1,453 tons, 4.5 % Hull, fittings & equipment: 12,519 tons, 38.4 % Fuel, ammunition & stores: 3,819 tons, 11.7 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 46,932 lbs / 21,288 Kg = 34.2 x 14.0 " / 356 mm shells or 8.6 torpedoes Stability (Unstable if below 1.00): 1.03 Metacentric height 4.9 ft / 1.5 m Roll period: 18.1 seconds Steadiness - As gun platform (Average = 50 %): 79 % - Recoil effect (Restricted arc if above 1.00): 1.17 Seaboat quality (Average = 1.00): 1.58 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.683 Length to Beam Ratio: 6.25 : 1 'Natural speed' for length: 24.49 kts Power going to wave formation at top speed: 45 % 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: 26.00 ft / 7.92 m - Forecastle (20 %): 24.00 ft / 7.32 m - Mid (67 %): 24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break) - Quarterdeck (15 %): 16.00 ft / 4.88 m - Stern: 16.00 ft / 4.88 m - Average freeboard: 21.52 ft / 6.56 m Ship tends to be wet forward Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 82.8 % - Above water (accommodation/working, high = better): 137.1 % Waterplane Area: 45,472 Square feet or 4,224 Square metres Displacement factor (Displacement / loading): 98 % Structure weight / hull surface area: 200 lbs/sq ft or 976 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.94 - Longitudinal: 1.69 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent 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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Friday, December 30, 2005
A new thread: American battleships
This starts a new design thread. Again, the thread starts in 1914. This time, the ship is an American battleship design: US/BB/1914. I must confess to being throughly conventional. I had thought of only having a 9-14in gun main armament, but I went with 12-14in, instead. The result seemed pretty reasonable. This is the Springsharp report:
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