Ger/CB/1906 Coal-fired boilers, Germany Battlecruiser laid down 1906 (Engine 1919)
Displacement:
24,890 t light; 25,828 t standard; 28,400 t normal; 30,458 t full load
Dimensions: Length overall / water x beam x draught
800.00 ft / 800.00 ft x 85.00 ft x 25.60 ft (normal load)
243.84 m / 243.84 m x 25.91 m x 7.80 m
Armament:
8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1906 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1906 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 7,296 lbs / 3,309 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 425.00 ft / 129.54 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 82 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 425.00 ft / 129.54 m 25.00 ft / 7.62 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 3.00" / 76 mm, Conning tower: 6.00" / 152 mm
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 4 shafts, 168,506 shp / 125,706 Kw = 33.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 4,630 tons (100% coal)
Complement:
1,093 - 1,422
Cost:
£2.559 million / $10.235 million
Distribution of weights at normal displacement:
Armament: 912 tons, 3.2 %
Armour: 5,914 tons, 20.8 %
- Belts: 1,181 tons, 4.2 %
- Torpedo bulkhead: 590 tons, 2.1 %
- Armament: 1,337 tons, 4.7 %
- Armour Deck: 2,686 tons, 9.5 %
- Conning Tower: 120 tons, 0.4 %
Machinery: 6,582 tons, 23.2 %
Hull, fittings & equipment: 11,481 tons, 40.4 %
Fuel, ammunition & stores: 3,510 tons, 12.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35,355 lbs / 16,037 Kg = 40.9 x 12.0 " / 305 mm shells or 3.9 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 5.4 ft / 1.6 m
Roll period: 15.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.571
Length to Beam Ratio: 9.41 : 1
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 53 %
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: 32.00 ft / 9.75 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (69 %): 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: 25.84 ft / 7.88 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 129.9 %
- Above water (accommodation/working, high = better): 219.6 %
Waterplane Area: 48,401 Square feet or 4,497 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 157 lbs/sq ft or 769 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.13
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
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Friday, September 29, 2006
The Ger/CB/1906 design comes out heavy
The Ger/CB/1906 design is very agressive. The design does a lot to shorten the armoured citadel, and to achieve a very high speed for a large ship laid down in 1906. The side armour is thin, 4in, but the deck is a rather thick 3in. The turret faces and barbettes are 6in. The ship is trying to carry 8-12in guns at 33 knots. The ship is an all-around better ship than its opponent, the GB/CB/1905 design. Optimistically, I had hoped for an overload speed of 36 knots, in 1971. This is the Springsharp report, for the version with coal-fired boilers:
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