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- Britannia Proposal 2, United Kingdom Battlecruiser laid down 1917
- Displacement:
- 55,091 t light; 58,907 t standard; 60,521 t normal; 61,811 t full load
- Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
- (856.00 ft / 856.00 ft) x 110.00 ft x (38.00 / 38.66 ft)
- (260.91 m / 260.91 m) x 33.53 m x (11.58 / 11.78 m)
- Armament:
- 9 - 18.00" / 457 mm 42.0 cal guns - 3,329.00lbs / 1,510.01kg shells, 150 per gun
- Breech loading guns in turret on barbette mounts, 1917 Model
- 3 x 3-gun mounts on centreline ends, majority forward
- 1 raised mount - superfiring
- 12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
- Quick firing guns in casemate mounts, 1917 Model
- 12 x Single mounts on side ends, evenly spread
- 12 hull mounts in casemates- Limited use in heavy seas
- Weight of broadside 31,268 lbs / 14,183 kg
- Armour:
- - Belts: Width (max) Length (avg) Height (avg)
- Main: 15.0" / 381 mm 450.00 ft / 137.16 m 23.50 ft / 7.16 m
- Ends: 4.00" / 102 mm 406.00 ft / 123.75 m 12.35 ft / 3.76 m
- Upper: 4.00" / 102 mm 556.40 ft / 169.59 m 8.00 ft / 2.44 m
- Main Belt covers 81 % of normal length
- Main belt does not fully cover magazines and engineering spaces
- Main Belt inclined 15.00 degrees (positive = in)
- - Torpedo Bulkhead - Additional damage containing bulkheads:
- 2.00" / 51 mm 556.40 ft / 169.59 m 32.77 ft / 9.99 m
- Beam between torpedo bulkheads 89.00 ft / 27.13 m
- - Hull void:
- 2.00" / 51 mm 450.00 ft / 137.16 m 15.00 ft / 4.57 m
- - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
- Main: 15.0" / 381 mm 12.0" / 305 mm 12.0" / 305 mm
- - Armoured deck - multiple decks:
- For and Aft decks: 8.00" / 203 mm
- Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Machinery:
- Oil fired boilers, steam turbines,
- Direct drive, 4 shafts, 184,300 shp / 137,488 Kw = 30.00 kts
- Range 7,000nm at 10.00 kts
- Bunker at max displacement = 2,904 tons
- Complement:
- 1,929 - 2,508
- Cost:
- £9.361 million / $37.446 million
- Distribution of weights at normal displacement:
- Armament: 4,681 tons, 7.7 %
- - Guns: 4,681 tons, 7.7 %
- Armour: 22,407 tons, 37.0 %
- - Belts: 8,537 tons, 14.1 %
- - Torpedo bulkhead: 1,349 tons, 2.2 %
- - Void: 500 tons, 0.8 %
- - Armament: 4,210 tons, 7.0 %
- - Armour Deck: 7,811 tons, 12.9 %
- Machinery: 6,756 tons, 11.2 %
- Hull, fittings & equipment: 21,247 tons, 35.1 %
- Fuel, ammunition & stores: 5,429 tons, 9.0 %
- Miscellaneous weights: 0 tons, 0.0 %
- Overall survivability and seakeeping ability:
- Survivability (Non-critical penetrating hits needed to sink ship):
- 75,878 lbs / 34,418 Kg = 26.0 x 18.0 " / 457 mm shells or 10.5 torpedoes
- Stability (Unstable if below 1.00): 1.11
- Metacentric height 7.0 ft / 2.1 m
- Roll period: 17.4 seconds
- Steadiness - As gun platform (Average = 50 %): 56 %
- - Recoil effect (Restricted arc if above 1.00): 0.92
- Seaboat quality (Average = 1.00): 1.12
- Hull form characteristics:
- Hull has a flush deck,
- a normal bow and a cruiser stern
- Block coefficient (normal/deep): 0.592 / 0.594
- Length to Beam Ratio: 7.78 : 1
- 'Natural speed' for length: 29.26 kts
- Power going to wave formation at top speed: 50 %
- Trim (Max stability = 0, Max steadiness = 100): 50
- Bow angle (Positive = bow angles forward): 0.00 degrees
- Stern overhang: 0.00 ft / 0.00 m
- Freeboard (% = length of deck as a percentage of waterline length):
- Fore end, Aft end
- - Forecastle: 25.00 %, 32.18 ft / 9.81 m, 26.33 ft / 8.03 m
- - Forward deck: 30.00 %, 26.33 ft / 8.03 m, 21.48 ft / 6.55 m
- - Aft deck: 20.00 %, 21.48 ft / 6.55 m, 21.48 ft / 6.55 m
- - Quarter deck: 25.00 %, 21.48 ft / 6.55 m, 21.48 ft / 6.55 m
- - Average freeboard: 24.01 ft / 7.32 m
- Ship space, strength and comments:
- Space - Hull below water (magazines/engines, low = better): 90.0 %
- - Above water (accommodation/working, high = better): 154.8 %
- Waterplane Area: 68,354 Square feet or 6,350 Square metres
- Displacement factor (Displacement / loading): 105 %
- Structure weight / hull surface area: 236 lbs/sq ft or 1,152 Kg/sq metre
- Hull strength (Relative):
- - Cross-sectional: 0.97
- - Longitudinal: 1.32
- - Overall: 1.00
- Adequate machinery, storage, compartmentation space
- Excellent accommodation and workspace room
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