Ersatz Iron Duke, UK battleship laid down 1912
Displacement:
23,225 t light; 24,651 t standard; 25,305 t normal; 25,829 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(631.27 ft / 623.36 ft) x 98.43 ft x (26.25 / 26.67 ft)
(192.41 m / 190.00 m) x 30.00 m x (8.00 / 8.13 m)
Armament:
9 - 13.50" / 343 mm 45.0 cal guns - 1,241.76lbs / 563.25kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1912 Model
2 x Triple mounts on centreline, forward deck forward
1 raised mount - superfiring
1 x Triple mount on centreline, aft deck centre
16 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 250 per gun
Breech loading guns in casemate mounts, 1912 Model
16 x Single mounts on side ends, evenly spread
16 raised mounts
6 - 4.72" / 120 mm 45.0 cal guns - 53.17lbs / 24.12kg shells, 250 per gun
Quick firing guns in deck and hoist mounts, 1912 Model
16 x Single mounts on sides, evenly spread
16 raised mounts
Weight of broadside 13,328 lbs / 6,046 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.8" / 275 mm 249.34 ft / 76.00 m 11.91 ft / 3.63 m
Ends: 4.92" / 125 mm 373.98 ft / 113.99 m 11.91 ft / 3.63 m
Upper: 3.94" / 100 mm 249.34 ft / 76.00 m 8.01 ft / 2.44 m
Main Belt covers 62 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead - Strengthened structural bulkheads:
2.95" / 75 mm 249.34 ft / 76.00 m 24.08 ft / 7.34 m
Beam between torpedo bulkheads 98.43 ft / 30.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 7.87" / 200 mm 7.87" / 200 mm
2nd: 6.10" / 155 mm - 3.94" / 100 mm
3rd: 4.13" / 105 mm - 4.13" / 105 mm
- Box over machinery:
2.95" / 75 mm
Forecastle: 2.95" / 75 mm Quarter deck: 2.95" / 75 mm
- Conning towers: Forward 10.04" / 255 mm, Aft 4.92" / 125 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 51,074 shp / 38,102 Kw = 24.00 kts
Range 4,000nm at 10.00 kts
Bunker at max displacement = 1,179 tons
Complement:
1,003 - 1,304
Cost:
£2.257 million / $9.030 million
Distribution of weights at normal displacement:
Armament: 2,279 tons, 9.0 %
- Guns: 2,279 tons, 9.0 %
Armour: 7,569 tons, 29.9 %
- Belts: 2,791 tons, 11.0 %
- Torpedo bulkhead: 656 tons, 2.6 %
- Armament: 2,174 tons, 8.6 %
- Armour Deck: 1,670 tons, 6.6 %
- Conning Towers: 278 tons, 1.1 %
Machinery: 2,036 tons, 8.0 %
Hull, fittings & equipment: 11,340 tons, 44.8 %
Fuel, ammunition & stores: 2,081 tons, 8.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
44,984 lbs / 20,404 Kg = 36.5 x 13.5 " / 343 mm shells or 7.2 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 6.5 ft / 2.0 m
Roll period: 16.2 seconds
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0.91
Seaboat quality (Average = 1.00): 1.56
Hull form characteristics:
Hull has raised forecastle, low quarterdeck ,
a straight bulbous bow and a cruiser stern
Block coefficient (normal/deep): 0.550 / 0.552
Length to Beam Ratio: 6.33 : 1
'Natural speed' for length: 24.97 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.53 ft / 9.00 m, 29.53 ft / 9.00 m
- Forward deck: 20.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Aft deck: 20.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Quarter deck: 40.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Average freeboard: 24.28 ft / 7.40 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.8 %
- Above water (accommodation/working, high = better): 213.4 %
Waterplane Area: 42,819 Square feet or 3,978 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 215 lbs/sq ft or 1,047 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 2.25
- Overall: 1.08
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather