Ger/CB/1943 Large, Germany Battlecruiser laid down 1943
Displacement:
137,845 t light; 144,080 t standard; 151,306 t normal; 157,087 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(1,264.14 ft / 1,250.00 ft) x 170.00 ft x (39.00 / 40.20 ft)
(385.31 m / 381.00 m) x 51.82 m x (11.89 / 12.25 m)
Armament:
9 - 21.00" / 533 mm 50.0 cal guns - 4,900.00lbs / 2,222.60kg shells, 120 per gun
Breech loading guns in turret on barbette mounts , 1943 Model
9 x Triple mounts on centreline ends, majority forward
3 raised mounts - superfiring
16 - 6.00" / 152 mm 55.0 cal guns - 116.57lbs / 52.88kg shells, 180 per gun
Quick firing guns in turret on barbette mount , 1943 Model
1 x Twin mount on sides amidships
24 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
Anti-air guns in deck and hoist mounts , 1943 Model
12 x Twin mounts on sides, evenly spread
12 raised mounts
64 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 240 per gun
Breech loading guns in deck mounts , 1943 Model
32 x Twin mounts on sides, evenly spread
24 raised mounts
Weight of broadside 46,886 lbs / 46,886 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 840.00 ft / 256.03 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 103 % of normal length
- Torpedo Bulkhead:
7.00" / 178 mm 840.00 ft / 256.03 m 39.00 ft / 11.89 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 12.0" / 305 mm 18.0" / 457 mm
2nd: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
3rd: 1.00" / 25 mm - 1.00" / 25 mm
- Armour deck: 7.00" / 178 mm, Conning tower: 16.00" / 406 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 8 shafts, 480,244 shp / 358,262 Kw = 35.00 kts
Range 10,000nm at 16.00 kts
Bunker at max displacement = 13,007 tons
Complement:
3,835 - 4,986
Cost:
£74.873 million / $299.491 million
Distribution of weights at normal displacement:
Armament: 7,789 tons, 5.1 %
Armour: 54,927 tons, 36.3 %
- Belts: 9,227 tons, 6.1 %
- Torpedo bulkhead: 8,485 tons, 5.6 %
- Armament: 14,469 tons, 9.6 %
- Armour Deck: 21,768 tons, 14.4 %
- Conning Tower: 979 tons, 0.6 %
Machinery: 12,403 tons, 8.2 %
Hull, fittings & equipment: 64,708 tons, 42.8 %
Fuel, ammunition & stores: 13,461 tons, 8.9 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
297,322 lbs / 134,863 Kg = 64.2 x 21.0 " / 533 mm shells or 81.7 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 14.9 ft / 4.5 m
Roll period: 18.5 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has a flush deck,
a normal bow and small transom stern
Block coefficient (normal/deep): 0.639 / 0.644
Length to Beam Ratio: 7.35 : 1
'Natural speed' for length: 40.75 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 43.00 ft / 13.11 m, 35.00 ft / 10.67 m
- Forward deck: 30.00 %, 35.00 ft / 10.67 m, 33.00 ft / 10.06 m
- Aft deck: 35.00 %, 33.00 ft / 10.06 m, 33.00 ft / 10.06 m
- Quarter deck: 15.00 %, 33.00 ft / 10.06 m, 35.00 ft / 10.67 m
- Average freeboard: 34.49 ft / 10.51 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.2 %
- Above water (accommodation/working, high = better): 279.4 %
Waterplane Area: 168,089 Square feet or 15,616 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 306 lbs/sq ft or 1,496 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.08
- Longitudinal: 0.97
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
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.
Monday, May 14, 2007
A large, but not extremely large, German battlecruiser
In more recent years, I have been thinking of designing rather large, but not quite so very large ships. This version backs off the size, protection, and range, to reduce the size and cost of a German battlecruiser, the Ger/CB/1943 Large design. This has 9-21in guns and a speed of 35 knots. The range is 10,000nm at 16 knots. The armour basis is 16in with a 7in deck. This is the Springsharp report:
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