GB/DL/1921, Great Britain Destroyer Leader laid down 1921 (Engine 1941)
Displacement:
1,978 t light; 2,063 t standard; 2,250 t normal; 2,400 t full load
Dimensions: Length overall / water x beam x draught
385.00 ft / 385.00 ft x 37.00 ft x 13.00 ft (normal load)
117.35 m / 117.35 m x 11.28 m x 3.96 m
Armament:
6 - 5.10" / 130 mm guns (3x2 guns), 66.33lbs / 30.08kg shells, 1921 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1921 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.89kg shells, 1921 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread, all raised mounts
Weight of broadside 448 lbs / 203 kg
Shells per gun, main battery: 150
8 - 24.0" / 609.6 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 60,010 shp / 44,768 Kw = 37.00 kts
Range 4,100nm at 15.00 kts
Bunker at max displacement = 337 tons
Complement:
163 - 212
Cost:
£0.731 million / $2.925 million
Distribution of weights at normal displacement:
Armament: 56 tons, 2.5 %
Machinery: 1,221 tons, 54.3 %
Hull, fittings & equipment: 701 tons, 31.2 %
Fuel, ammunition & stores: 272 tons, 12.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
521 lbs / 236 Kg = 7.9 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 1.9 ft / 0.6 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.425
Length to Beam Ratio: 10.41 : 1
'Natural speed' for length: 22.54 kts
Power going to wave formation at top speed: 70 %
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 (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 23.00 ft / 7.01 m
- Mid (33 %): 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: 17.88 ft / 5.45 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 194.1 %
- Above water (accommodation/working, high = better): 88.8 %
Waterplane Area: 9,255 Square feet or 860 Square metres
Displacement factor (Displacement / loading): 62 %
Structure weight / hull surface area: 36 lbs/sq ft or 175 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.43
- Longitudinal: 2.43
- Overall: 0.51
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.
Saturday, December 09, 2006
I wondered if a smaller large destroyer would still work
I decided that I needed to see if a smaller ship could be designed that would still reach 37 knots and have a decent armament. The result is a GB/DL/1921 with a normal displacement of 2,200 tons. The armament is 6-13cm (5.1in) QF guns, 2-3in AA, and 12-2pdr AA guns, with 8-24in TT. The range is reduced to 4,100 nm at 15 knots. This is the Springsharp report:
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