GB/CB/1907 Design E-5 Dec 1906, Great Britain Battlecruiser laid down 1907
Displacement:
18,350 t light; 19,190 t standard; 22,400 t normal; 24,968 t full load
Dimensions: Length overall / water x beam x draught
590.00 ft / 590.00 ft x 83.00 ft x 27.00 ft (normal load)
179.83 m / 179.83 m x 25.30 m x 8.23 m
Armament:
4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships
16 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model
Quick firing guns in casemate mounts
on side, evenly spread, 8 raised mounts
Weight of broadside 7,424 lbs / 3,367 kg
Shells per gun, main battery: 90
5 - 18.0" / 457.2 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 390.00 ft / 118.87 m 8.00 ft / 2.44 m
Ends: 4.00" / 102 mm 80.00 ft / 24.38 m 8.00 ft / 2.44 m
120.00 ft / 36.58 m Unarmoured ends
Upper: 5.00" / 127 mm 390.00 ft / 118.87 m 8.00 ft / 2.44 m
Main Belt covers 102 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 390.00 ft / 118.87 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm
2nd: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm
3rd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 4 shafts, 56,375 shp / 42,056 Kw = 25.00 kts
Range 5,700nm at 15.00 kts
Bunker at max displacement = 5,778 tons (100% coal)
Complement:
915 - 1,190
Cost:
£1.915 million / $7.660 million
Distribution of weights at normal displacement:
Armament: 928 tons, 4.1 %
Armour: 5,692 tons, 25.4 %
- Belts: 1,978 tons, 8.8 %
- Torpedo bulkhead: 584 tons, 2.6 %
- Armament: 1,659 tons, 7.4 %
- Armour Deck: 1,316 tons, 5.9 %
- Conning Tower: 154 tons, 0.7 %
Machinery: 3,523 tons, 15.7 %
Hull, fittings & equipment: 8,206 tons, 36.6 %
Fuel, ammunition & stores: 4,050 tons, 18.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,018 lbs / 13,162 Kg = 33.6 x 12.0 " / 305 mm shells or 4.0 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 5.1 ft / 1.6 m
Roll period: 15.4 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.64
Seaboat quality (Average = 1.00): 1.45
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.593
Length to Beam Ratio: 7.11 : 1
'Natural speed' for length: 24.29 kts
Power going to wave formation at top speed: 51 %
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 (68 %): 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: 22.68 ft / 6.91 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 112.7 %
- Above water (accommodation/working, high = better): 169.7 %
Waterplane Area: 35,581 Square feet or 3,306 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 155 lbs/sq ft or 758 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.76
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
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, October 27, 2006
The GB/CB/1907 Design E from 5 December 1906
Design E would have been a very good ship, as were some of the earlier versions. Design E had a 9in armour basis and had a maximum speed of 25 knots. The armament was the usual 8-12in guns and 16-4in QF guns. Design E would have been more costly, as the design displacement was 21,400 tons. This is the Springsharp report:
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