GB/BB/1927, Great Britain Battleship laid down 1927
Displacement:
60,794 t light; 63,666 t standard; 67,500 t normal; 70,567 t full load
Dimensions: Length overall / water x beam x draught
930.52 ft / 925.00 ft x 125.00 ft x 35.00 ft (normal load)
283.62 m / 281.94 m x 38.10 m x 10.67 m
Armament:
8 - 20.00" / 508 mm guns (2x4 guns), 4,000.00lbs / 1,814.37kg shells, 1927 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 1 raised mount
16 - 6.00" / 152 mm guns (6 mounts), 108.00lbs / 48.99kg shells, 1927 Model
Quick firing guns in turrets (on barbettes)
on side ends, evenly spread
6 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1927 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
Weight of broadside 33,920 lbs / 15,386 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 560.00 ft / 170.69 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 93 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 10.0" / 254 mm 16.0" / 406 mm
2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm
3rd: 2.00" / 51 mm - -
- Armour deck: 6.00" / 152 mm, Conning tower: 16.00" / 406 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 129,971 shp / 96,958 Kw = 27.00 kts
Range 8,750nm at 15.00 kts
Bunker at max displacement = 6,900 tons
Complement:
2,093 - 2,722
Cost:
£22.777 million / $91.109 million
Distribution of weights at normal displacement:
Armament: 4,240 tons, 6.3 %
Armour: 21,805 tons, 32.3 %
- Belts: 6,650 tons, 9.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5,338 tons, 7.9 %
- Armour Deck: 9,245 tons, 13.7 %
- Conning Tower: 571 tons, 0.8 %
Machinery: 4,103 tons, 6.1 %
Hull, fittings & equipment: 30,647 tons, 45.4 %
Fuel, ammunition & stores: 6,706 tons, 9.9 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
102,633 lbs / 46,554 Kg = 25.7 x 20.0 " / 508 mm shells or 6.5 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 8.1 ft / 2.5 m
Roll period: 18.4 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.91
Seaboat quality (Average = 1.00): 1.50
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.584
Length to Beam Ratio: 7.40 : 1
'Natural speed' for length: 30.41 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 4.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36.00 ft / 10.97 m
- Forecastle (20 %): 27.00 ft / 8.23 m
- Mid (50 %): 27.00 ft / 8.23 m
- Quarterdeck (15 %): 27.00 ft / 8.23 m
- Stern: 27.00 ft / 8.23 m
- Average freeboard: 27.72 ft / 8.45 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 66.7 %
- Above water (accommodation/working, high = better): 204.7 %
Waterplane Area: 83,292 Square feet or 7,738 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 267 lbs/sq ft or 1,304 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.43
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
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.
Monday, August 29, 2005
My ideas in the mid-to-late 1970's for a large battleship
In the 1970's, I was very interested in reducing the length of the armored citadel in battleships and battlecruisers. This is a design study that I did in the mid-to-late 1970's for a battleship with 27 knot speed and 8-20in/45 guns. The armor basis is only 16in. The dimensions are 935ft x 125ft x 35ft. There are two quadruple turrets forward, with the second superfiring the first. The secondary armament is at the upper deck level with 6-4in AA guns a level higher. The bridge structure is vaguely influenced byu the Richelieu, as is the armament layout. This is the Stringsharp report:
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