GB/CB/1912, Great Britain Battlecruiser laid down 1912
Displacement:
28,447 t light; 29,872 t standard; 32,500 t normal; 34,602 t full load
Dimensions: Length overall / water x beam x draught
765.00 ft / 765.00 ft x 94.00 ft x 27.00 ft (normal load)
233.17 m / 233.17 m x 28.65 m x 8.23 m
Armament:
8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Quick firing guns in casemate mounts
on side, all amidships
12 guns in hull casemates - Limited use in heavy seas
Weight of broadside 15,228 lbs / 6,907 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m
Ends: 4.00" / 102 mm 280.00 ft / 85.34 m 8.00 ft / 2.44 m
Upper: 6.00" / 152 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 485.00 ft / 147.83 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 7.00" / 178 mm 9.00" / 229 mm
2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm
- Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 114,576 shp / 85,474 Kw = 29.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 4,730 tons
Complement:
1,209 - 1,573
Cost:
£3.234 million / $12.937 million
Distribution of weights at normal displacement:
Armament: 1,904 tons, 5.9 %
Armour: 8,209 tons, 25.3 %
- Belts: 2,822 tons, 8.7 %
- Torpedo bulkhead: 727 tons, 2.2 %
- Armament: 2,542 tons, 7.8 %
- Armour Deck: 1,920 tons, 5.9 %
- Conning Tower: 197 tons, 0.6 %
Machinery: 4,568 tons, 14.1 %
Hull, fittings & equipment: 13,766 tons, 42.4 %
Fuel, ammunition & stores: 4,053 tons, 12.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
39,535 lbs / 17,933 Kg = 23.4 x 15.0 " / 381 mm shells or 5.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 5.8 ft / 1.8 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.80
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.586
Length to Beam Ratio: 8.14 : 1
'Natural speed' for length: 27.66 kts
Power going to wave formation at top speed: 50 %
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: 28.00 ft / 8.53 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (67 %): 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: 22.60 ft / 6.89 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 113.6 %
- Above water (accommodation/working, high = better): 186.3 %
Waterplane Area: 51,903 Square feet or 4,822 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 188 lbs/sq ft or 920 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.10
- 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.
Monday, October 23, 2006
My attempt at a battlecruiser analog to the Queen Elizabeth class
The initial plan was to build a battlecruiser in 1912 to go with the battleships to be built. In the event, only the four battleships were built, with a fifth funded by Malaya. This is my concept of what a battlecruiser laid down in 1912, with 8-15in BLR and 16-6in QF guns, with a 9in armour basis and a 29 knot speed might be like:
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