US/DL/1936, United States Destroyer Leader laid down 1936
Displacement:
5,847 t light; 6,071 t standard; 6,414 t normal; 6,689 t full load
Dimensions: Length overall / water x beam x draught
518.08 ft / 498.00 ft x 49.00 ft x 20.00 ft (normal load)
157.91 m / 151.79 m x 14.94 m x 6.10 m
Armament:
8 - 5.50" / 140 mm guns (4x2 guns), 83.19lbs / 37.73kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 697 lbs / 316 kg
Shells per gun, main battery: 240
10 - 21.0" / 533.4 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 110,620 shp / 82,523 Kw = 36.00 kts
Range 3,500nm at 15.00 kts
Bunker at max displacement = 618 tons
Complement:
357 - 465
Cost:
£3.756 million / $15.024 million
Distribution of weights at normal displacement:
Armament: 87 tons, 1.4 %
Machinery: 3,104 tons, 48.4 %
Hull, fittings & equipment: 2,656 tons, 41.4 %
Fuel, ammunition & stores: 567 tons, 8.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,061 lbs / 1,389 Kg = 36.8 x 5.5 " / 140 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 2.8 ft / 0.9 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.37
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.460
Length to Beam Ratio: 10.16 : 1
'Natural speed' for length: 22.32 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 19.00 ft / 5.79 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (15 %): 19.00 ft / 5.79 m
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 19.96 ft / 6.08 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 167.4 %
- Above water (accommodation/working, high = better): 114.2 %
Waterplane Area: 15,695 Square feet or 1,458 Square metres
Displacement factor (Displacement / loading): 93 %
Structure weight / hull surface area: 87 lbs/sq ft or 426 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.61
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
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.
Sunday, January 23, 2005
Super-destroyer leader: US/DL/1936
To go with the rest, I have my super-destroyer leader. I couldn't resist having an odd gun, the 5.5in DP, of which I included 8, along with 16-40mm AA and 10-21in TT. The speed is the hoped-for 36 knots, but only a 3,500 nm range.
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