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
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
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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