GB/BB/1912, Great Britain Battleship laid down 1912
Displacement:
32,569 t light; 34,052 t standard; 36,500 t normal; 38,458 t full load
Dimensions: Length overall / water x beam x draught
700.00 ft / 700.00 ft x 105.00 ft x 29.00 ft (normal load)
213.36 m / 213.36 m x 32.00 m x 8.84 m
Armament:
9 - 15.00" / 381 mm guns (3x3 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, 1 raised mount
Aft Main mounts separated by engine room
14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Quick firing guns in casemate mounts
on side, all forward, 4 raised mounts - superfiring
Weight of broadside 16,700 lbs / 7,575 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 400.00 ft / 121.92 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 88 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 400.00 ft / 121.92 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 10.0" / 254 mm 14.0" / 356 mm
2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm
- Armour deck: 5.00" / 127 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 45,095 shp / 33,641 Kw = 22.00 kts
Range 5,600nm at 15.00 kts
Bunker at max displacement = 4,406 tons
Complement:
1,319 - 1,716
Cost:
£3.145 million / $12.580 million
Distribution of weights at normal displacement:
Armament: 2,087 tons, 5.7 %
Armour: 14,205 tons, 38.9 %
- Belts: 4,270 tons, 11.7 %
- Torpedo bulkhead: 1,199 tons, 3.3 %
- Armament: 3,434 tons, 9.4 %
- Armour Deck: 4,969 tons, 13.6 %
- Conning Tower: 332 tons, 0.9 %
Machinery: 1,798 tons, 4.9 %
Hull, fittings & equipment: 14,479 tons, 39.7 %
Fuel, ammunition & stores: 3,931 tons, 10.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
63,099 lbs / 28,621 Kg = 37.4 x 15.0 " / 381 mm shells or 11.6 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 6.8 ft / 2.1 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.67
Seaboat quality (Average = 1.00): 1.51
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.599
Length to Beam Ratio: 6.67 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -1.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (59 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 21.96 ft / 6.69 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72.9 %
- Above water (accommodation/working, high = better): 169.1 %
Waterplane Area: 53,724 Square feet or 4,991 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 199 lbs/sq ft or 971 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.45
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
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, September 20, 2005
The GB/BB/1915, evidently from August 2001
The GB/BB/1912 design for my friend Cliff, did not work very well in SpringSharp. I had to lower freeboard and greatly increase the displacent (to 36,500 tons, normal). The original intent was for something like 32,500 tons. I confirmed that the secondary armament was intended to be 14-6in QF guns. I am reasonably certain that Cliff wanted a 14in armor basis. This is the SpringSharp report:
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