Ger/CBL/1915 Mod.A, Enter country Enter ship type laid down 1915 (Engine 1950)
Displacement:
20,941 t light; 21,537 t standard; 22,600 t normal; 23,450 t full load
Dimensions: Length overall / water x beam x draught
803.83 ft / 800.00 ft x 80.00 ft x 25.00 ft (normal load)
245.01 m / 243.84 m x 24.38 m x 7.62 m
Armament:
2 - 12.00" / 305 mm guns (1x2 guns), 864.00lbs / 391.90kg shells, 1915 Model
Breech loading guns in a turret (on a barbette)
on centreline forward
12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
Quick firing guns in deck mounts with hoists
on side, all amidships
Weight of broadside 3,024 lbs / 1,372 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 620.00 ft / 188.98 m 12.00 ft / 3.66 m
Ends: 3.00" / 76 mm 620.00 ft / 188.98 m 8.00 ft / 2.44 m
Main Belt covers 119 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 4.00" / 102 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 6 shafts, 304,597 shp / 227,229 Kw = 40.00 kts
Range 3,750nm at 18.00 kts
Bunker at max displacement = 1,914 tons
Complement:
921 - 1,198
Cost:
£3.012 million / $12.047 million
Distribution of weights at normal displacement:
Armament: 378 tons, 1.7 %
Armour: 3,753 tons, 16.6 %
- Belts: 1,757 tons, 7.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 323 tons, 1.4 %
- Armour Deck: 1,570 tons, 6.9 %
- Conning Tower: 103 tons, 0.5 %
Machinery: 7,287 tons, 32.2 %
Hull, fittings & equipment: 9,523 tons, 42.1 %
Fuel, ammunition & stores: 1,659 tons, 7.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,104 lbs / 10,480 Kg = 26.7 x 12.0 " / 305 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 5.5 ft / 1.7 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.494
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 35.00 ft / 10.67 m
- Forecastle (20 %): 30.00 ft / 9.14 m
- Mid (67 %): 30.00 ft / 9.14 m (22.00 ft / 6.71 m aft of break)
- Quarterdeck (15 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 27.76 ft / 8.46 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.1 %
- Above water (accommodation/working, high = better): 243.8 %
Waterplane Area: 42,425 Square feet or 3,941 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 138 lbs/sq ft or 675 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.44
- 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.
Friday, July 15, 2005
I found the armor diagram for the Ger/CBL/1915 Mod.A design
Since I had the cross section for the Ger/CBL/1915 design, I thought that it would be worth recalculating. One thing I learned immediately is that there is no armor protection on the anti-torpedo protection system. To save weight, there is only compartmentation. This is the new Springsharp report:
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