Ger/CB/1911, Germany Battlecruiser laid down 1911 (Engine 1927)
Displacement:
29,388 t light; 30,073 t standard; 34,250 t normal; 37,592 t full load
Dimensions: Length overall / water x beam x draught
751.00 ft / 750.00 ft x 100.00 ft x 30.10 ft (normal load)
228.90 m / 228.60 m x 30.48 m x 9.17 m
Armament:
6 - 12.00" / 305 mm guns (2x3 guns), 864.00lbs / 391.90kg shells, 1911 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1911 Model
Quick firing guns in deck mounts with hoists
on side, all forward, 2 raised mounts - superfiring
Weight of broadside 6,048 lbs / 2,743 kg
Shells per gun, main battery: 0
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 540.00 ft / 164.59 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 111 % of normal length
- Torpedo Bulkhead:
2.00" / 51 mm 540.00 ft / 164.59 m 28.00 ft / 8.53 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 6.00" / 152 mm 8.00" / 203 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 5.00" / 127 mm, Conning tower: 8.00" / 203 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 221,820 shp / 165,478 Kw = 34.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 7,519 tons
Complement:
1,258 - 1,636
Cost:
£2.644 million / $10.575 million
Distribution of weights at normal displacement:
Armament: 756 tons, 2.2 %
Armour: 9,460 tons, 27.6 %
- Belts: 2,312 tons, 6.8 %
- Torpedo bulkhead: 1,119 tons, 3.3 %
- Armament: 1,090 tons, 3.2 %
- Armour Deck: 4,756 tons, 13.9 %
- Conning Tower: 182 tons, 0.5 %
Machinery: 7,002 tons, 20.4 %
Hull, fittings & equipment: 12,170 tons, 35.5 %
Fuel, ammunition & stores: 4,862 tons, 14.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
49,322 lbs / 22,372 Kg = 57.1 x 12.0 " / 305 mm shells or 6.8 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 8.1 ft / 2.5 m
Roll period: 14.7 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.531
Length to Beam Ratio: 7.50 : 1
'Natural speed' for length: 27.39 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 34.00 ft / 10.36 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (50 %): 25.00 ft / 7.62 m
- Quarterdeck (15 %): 25.00 ft / 7.62 m
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 25.72 ft / 7.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.0 %
- Above water (accommodation/working, high = better): 194.6 %
Waterplane Area: 51,421 Square feet or 4,777 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 162 lbs/sq ft or 791 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.52
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
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Saturday, July 02, 2005
The redesigned Ger/CB/1911 looks like a super-ship
The next design to reconsider was the Ger/CB/1911 battlecruiser. This is a flush-decked ship with two triple-12in/50 BLR turrets forward and 8-6in QF guns in shields, arrayed next to, and on, the forward superstructure. The belt is just 6 inches but the deck armour is 5 inches. The turrets and barbettes are 8 inches. In this case, I had underestimated what could be done on a given displacement (35,000 tons). I had decided that I could have 40 SHP/ton machinery, although my Springsharp design has lower power output machinery than that, although with a much greater power than originally planned. The new design can reach 34 knots on just a 34,500 ton displacement. This is the Springsharp report:
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