GB/DD/1931, Great Britain Destroyer laid down 1931 (Engine 1941)
Displacement:
1,912 t light; 2,010 t standard; 2,150 t normal; 2,262 t full load
Dimensions: Length overall / water x beam x draught
366.75 ft / 365.00 ft x 35.00 ft x 15.00 ft (normal load)
111.78 m / 111.25 m x 10.67 m x 4.57 m
Armament:
8 - 4.70" / 119 mm guns (4x2 guns), 51.91lbs / 23.55kg shells, 1931 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 1 raised mount - superfiring
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1931 Model
Anti-aircraft gun in a deck mount with hoist
on side amidships
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.89kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 471 lbs / 214 kg
Shells per gun, main battery: 200
10 - 21.0" / 533.4 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 58,631 shp / 43,739 Kw = 37.00 kts
Range 5,000nm at 12.00 kts
Bunker at max displacement = 253 tons
Complement:
157 - 205
Cost:
£1.217 million / $4.867 million
Distribution of weights at normal displacement:
Armament: 59 tons, 2.7 %
Machinery: 1,161 tons, 54.0 %
Hull, fittings & equipment: 692 tons, 32.2 %
Fuel, ammunition & stores: 238 tons, 11.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
465 lbs / 211 Kg = 9.0 x 4.7 " / 119 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 1.6 ft / 0.5 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.78
Seaboat quality (Average = 1.00): 1.10
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.393
Length to Beam Ratio: 10.43 : 1
'Natural speed' for length: 22.05 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 4.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.00 ft / 7.62 m
- Forecastle (20 %): 23.00 ft / 7.01 m
- Mid (36 %): 23.00 ft / 7.01 m (15.00 ft / 4.57 m aft of break)
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 18.04 ft / 5.50 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 195.8 %
- Above water (accommodation/working, high = better): 77.1 %
Waterplane Area: 8,128 Square feet or 755 Square metres
Displacement factor (Displacement / loading): 60 %
Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.42
- Longitudinal: 3.38
- Overall: 0.52
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
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.
Tuesday, December 27, 2005
The GB/DD/1931 design
I almost would say that this design is "underperforming", in that while it is good, perhaps the speed could be higher. The armament is increased to 8-4.7in QF, 1-4in AA, 12-2pdr AA, with 10-21in TT. The maximum speed is still 37 knots and the range is 5,000nm at just 12 knots. This is the Springsharp report:
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