US-CB-1943, United States Battlecruiser laid down 1943
Displacement:
192,480 t light; 201,981 t standard; 217,137 t normal; 229,261 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(1,366.74 ft / 1,350.00 ft) x 188.00 ft x (38.00 / 39.85 ft)
(416.58 m / 411.48 m) x 57.30 m x (11.58 / 12.15 m)
Armament:
12 - 21.00" / 533 mm 55.0 cal guns - 5,000.00lbs / 2,267.96kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1943 Model
3 x Quad mounts on centreline ends, majority forward
1 raised mount - superfiring
24 - 5.00" / 127 mm 55.0 cal guns - 72.00lbs / 32.66kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1943 Model
12 x Twin mounts on sides, forward deck aft
4 raised mounts - superfiring
88 - 1.57" / 40.0 mm 60.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
Breech loading guns in deck mounts, 1943 Model
22 x 4-gun mounts on sides, evenly spread
12 raised mounts
Weight of broadside 61,904 lbs / 28,079 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 18.0" / 457 mm 900.00 ft / 274.32 m 9.00 ft / 2.74 m
Ends: Unarmoured
Upper: 14.0" / 356 mm 900.00 ft / 274.32 m 9.00 ft / 2.74 m
Main Belt covers 103 % of normal length
Main belt does not fully cover magazines and engineering spaces
Main Belt inclined -17.00 degrees (positive = in)
- Torpedo Bulkhead - Additional damage containing bulkheads:
8.00" / 203 mm 900.00 ft / 274.32 m 37.00 ft / 11.28 m
Beam between torpedo bulkheads 80.00 ft / 24.38 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 20.0" / 508 mm 15.0" / 381 mm 20.0" / 508 mm
2nd: 5.00" / 127 mm 4.00" / 102 mm 5.00" / 127 mm
- Armoured deck - multiple decks:
For and Aft decks: 8.00" / 203 mm
Forecastle: 5.00" / 127 mm Quarter deck: 8.00" / 203 mm
- Conning towers: Forward 20.00" / 508 mm, Aft 15.00" / 381 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 10 shafts, 637,542 shp / 475,606 Kw = 35.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 27,280 tons
Complement:
5,029 - 6,538
Cost:
£105.209 million / $420.837 million
Distribution of weights at normal displacement:
Armament: 11,042 tons, 5.1 %
- Guns: 11,042 tons, 5.1 %
Armour: 69,922 tons, 32.2 %
- Belts: 11,396 tons, 5.2 %
- Torpedo bulkhead: 9,857 tons, 4.5 %
- Armament: 12,878 tons, 5.9 %
- Armour Deck: 33,067 tons, 15.2 %
- Conning Towers: 2,724 tons, 1.3 %
Machinery: 16,465 tons, 7.6 %
Hull, fittings & equipment: 95,051 tons, 43.8 %
Fuel, ammunition & stores: 24,657 tons, 11.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
495,302 lbs / 224,665 Kg = 107.0 x 21.0 " / 533 mm shells or 150.3 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 22.2 ft / 6.8 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0.32
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has a flush deck,
an extended bulbous bow and large transom stern
Block coefficient (normal/deep): 0.788 / 0.793
Length to Beam Ratio: 7.18 : 1
'Natural speed' for length: 41.90 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 46.00 ft / 14.02 m, 40.00 ft / 12.19 m
- Forward deck: 30.00 %, 40.00 ft / 12.19 m, 38.00 ft / 11.58 m
- Aft deck: 35.00 %, 38.00 ft / 11.58 m, 37.00 ft / 11.28 m
- Quarter deck: 15.00 %, 37.00 ft / 11.28 m, 38.00 ft / 11.58 m
- Average freeboard: 38.93 ft / 11.87 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 129.5 %
- Above water (accommodation/working, high = better): 332.2 %
Waterplane Area: 229,646 Square feet or 21,335 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 352 lbs/sq ft or 1,718 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.18
- Longitudinal: 0.95
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
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, July 17, 2009
A super American battlecruiser: the US/CB/1943
I have been toying with very large battleship and battlecruiser designs since I was young. This is a fast battlecruiser armed with 12-21in/55 guns. I don't like the deep draft, but I don't see an alternative.
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