Ger/CB/1915 Design Study E1, Germany Battlecruiser laid down 1915
Displacement:
47,513 t light; 49,676 t standard; 54,481 t normal; 58,325 t full load
Dimensions: Length overall / water x beam x draught
850.61 ft / 850.00 ft x 110.00 ft x 33.00 ft (normal load)
259.27 m / 259.08 m x 33.53 m x 10.06 m
Armament:
9 - 16.50" / 419 mm guns (3x3 guns), 2,246.06lbs / 1,018.80kg shells, 1915 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, all raised mounts - superfiring
10 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
Quick firing guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 21,295 lbs / 9,659 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 670.00 ft / 204.22 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 121 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 7.00" / 178 mm 9.00" / 229 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 3.00" / 76 mm, Conning tower: 10.00" / 254 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 257,581 shp / 192,156 Kw = 33.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 8,649 tons
Complement:
1,782 - 2,317
Cost:
£7.658 million / $30.632 million
Distribution of weights at normal displacement:
Armament: 2,662 tons, 4.9 %
Armour: 11,743 tons, 21.6 %
- Belts: 4,243 tons, 7.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3,331 tons, 6.1 %
- Armour Deck: 3,860 tons, 7.1 %
- Conning Tower: 310 tons, 0.6 %
Machinery: 9,757 tons, 17.9 %
Hull, fittings & equipment: 23,352 tons, 42.9 %
Fuel, ammunition & stores: 6,968 tons, 12.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
63,398 lbs / 28,757 Kg = 28.2 x 16.5 " / 419 mm shells or 3.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.9 ft / 2.1 m
Roll period: 17.6 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.95
Seaboat quality (Average = 1.00): 1.11
Hull form characteristics:
Hull has rise forward of midbreak, low quarterdeck
Block coefficient: 0.618
Length to Beam Ratio: 7.73 : 1
'Natural speed' for length: 29.15 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 1.00 degrees
Stern overhang: -1.00 ft / -0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 35.00 ft / 10.67 m
- Forecastle (20 %): 33.00 ft / 10.06 m
- Mid (63 %): 33.00 ft / 10.06 m (25.00 ft / 7.62 m aft of break)
- Quarterdeck (15 %): 22.00 ft / 6.71 m (25.00 ft / 7.62 m before break)
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 29.98 ft / 9.14 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.6 %
- Above water (accommodation/working, high = better): 225.2 %
Waterplane Area: 69,541 Square feet or 6,461 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 231 lbs/sq ft or 1,130 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.51
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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.
Thursday, January 13, 2005
Yet another Ger/CB/1915 design study (E1)
The Ger/CB/1915 E1 design study was a large, Hood-like ship, except with 9-16.5in/45 guns and 10-6in/50 QF guns. The armor is decidely on the Lion scale. The ship is fast: 33 knots. Partly because of that, and the size of the guns, the design is not as good in Springsharp. Overall, the ship is "pretty good" (only).
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