Ger/CB/1915, Germany Battlecruiser laid down 1915 (Engine 1937)
Displacement:
38,850 t light; 40,455 t standard; 42,750 t normal; 44,586 t full load
Dimensions: Length overall / water x beam x draught
901.73 ft / 900.00 ft x 100.00 ft x 30.00 ft (normal load)
274.85 m / 274.32 m x 30.48 m x 9.14 m
Armament:
6 - 16.50" / 419 mm guns (2x3 guns), 2,246.06lbs / 1,018.80kg shells, 1915 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
12 - 6.00" / 152 mm guns (4x3 guns), 108.00lbs / 48.99kg shells, 1915 Model
Quick firing guns in turrets (on barbettes)
on side, all aft
Weight of broadside 14,772 lbs / 6,701 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 420.00 ft / 128.02 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 72 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
3.00" / 76 mm 420.00 ft / 128.02 m 29.00 ft / 8.84 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 292,831 shp / 218,452 Kw = 36.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 4,132 tons
Complement:
1,486 - 1,932
Cost:
£5.887 million / $23.547 million
Distribution of weights at normal displacement:
Armament: 1,847 tons, 4.3 %
Armour: 10,159 tons, 23.8 %
- Belts: 2,877 tons, 6.7 %
- Torpedo bulkhead: 1,352 tons, 3.2 %
- Armament: 2,194 tons, 5.1 %
- Armour Deck: 3,500 tons, 8.2 %
- Conning Tower: 237 tons, 0.6 %
Machinery: 8,116 tons, 19.0 %
Hull, fittings & equipment: 18,728 tons, 43.8 %
Fuel, ammunition & stores: 3,900 tons, 9.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
52,051 lbs / 23,610 Kg = 23.2 x 16.5 " / 419 mm shells or 6.2 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 6.6 ft / 2.0 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.70
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.554
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 30.00 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.00 ft / 10.06 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (74 %): 28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 26.32 ft / 8.02 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.5 %
- Above water (accommodation/working, high = better): 215.4 %
Waterplane Area: 63,056 Square feet or 5,858 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 203 lbs/sq ft or 993 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
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.
Tuesday, May 30, 2006
The Ger/CB/1915 lives up to expectations
I am sure that the intent for the Ger/CB/1915, when I designed it, in the early 1970's, was to achieve a high speed. The main armament is grouped forward and the armoured citadel is short. The one deviation is that I am sure that the originally envisioned displacement was much lower than 40,455 tons standard. The armament is 6-16.5in BLR and 12-6in QF guns. The armour basis is 9in with a 3in deck and torpedo bulkhead. The speed is a nice 36 knots. This is the Springsharp report:
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