\GB/BB/1906, Great Britain Battlecruiser laid down 1906 (Engine 1911)
Displacement:
20,854 t light; 21,808 t standard; 26,192 t normal; 29,700 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(645.00 ft / 638.00 ft) x 82.00 ft x (27.00 / 30.07 ft)
(196.60 m / 194.46 m) x 24.99 m x (8.23 / 9.16 m)
Armament:
8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1906 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
16 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
Quick firing guns in casemate mounts, 1906 Model
16 x Single mounts on sides, evenly spread
8 raised mounts
Weight of broadside 7,487 lbs / 3,396 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 430.00 ft / 131.06 m 9.00 ft / 2.74 m
Ends: Unarmoured
Upper: 6.00" / 152 mm 430.00 ft / 131.06 m 8.00 ft / 2.44 m
Main Belt covers 104 % of normal length
- Torpedo Bulkhead - Additional damage containing bulkheads:
2.00" / 51 mm 430.00 ft / 131.06 m 27.00 ft / 8.23 m
Beam between torpedo bulkheads 56.00 ft / 17.07 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 8.00" / 203 mm 10.0" / 254 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armoured deck - multiple decks:
For and Aft decks: 2.00" / 51 mm
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 11.00" / 279 mm, Aft 8.00" / 203 mm
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 4 shafts, 82,731 shp / 61,717 Kw = 27.00 kts
Range 7,500nm at 16.00 kts
Bunker at max displacement = 7,891 tons (100% coal)
Complement:
1,029 - 1,338
Cost:
£1.923 million / $7.691 million
Distribution of weights at normal displacement:
Armament: 1,331 tons, 5.1 %
- Guns: 1,331 tons, 5.1 %
Armour: 7,070 tons, 27.0 %
- Belts: 2,188 tons, 8.4 %
- Torpedo bulkhead: 859 tons, 3.3 %
- Armament: 2,171 tons, 8.3 %
- Armour Deck: 1,491 tons, 5.7 %
- Conning Towers: 361 tons, 1.4 %
Machinery: 3,693 tons, 14.1 %
Hull, fittings & equipment: 8,759 tons, 33.4 %
Fuel, ammunition & stores: 5,338 tons, 20.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
42,557 lbs / 19,303 Kg = 49.3 x 12.0 " / 305 mm shells or 6.1 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.6 ft / 1.4 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.29
Hull form characteristics:
Hull has low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.649 / 0.661
Length to Beam Ratio: 7.78 : 1
'Natural speed' for length: 25.26 kts
Power going to wave formation at top speed: 53 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 29.00 ft / 8.84 m, 27.00 ft / 8.23 m
- Forward deck: 30.00 %, 27.00 ft / 8.23 m, 26.00 ft / 7.92 m
- Aft deck: 14.00 %, 26.00 ft / 7.92 m, 26.00 ft / 7.92 m
- Quarter deck: 31.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Average freeboard: 24.12 ft / 7.35 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.2 %
- Above water (accommodation/working, high = better): 195.2 %
Waterplane Area: 40,040 Square feet or 3,720 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 155 lbs/sq ft or 758 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.52
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily
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Saturday, May 10, 2008
The battlecruiser analog of the GB/BB/1906: the GB/CB/1906
The battlecruiser version of the GB/BB/1906 naturally has lighter armour and higher speed. The lower belt is still 8in thick, so it is not another Invincible. The speed is also higher at 27 knots (although I had heard that an invincible might be able to make higher speed). The ships have 8-12in/45 and 16-4in QF guns. This is the Springsharp report:
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