USS Fletcher, United States Destroyer Leader laid down 1936
Displacement:
2,540 t light; 2,714 t standard; 2,994 t normal; 3,218 t full load
Dimensions: Length overall / water x beam x draught
427.98 ft / 420.00 ft x 44.00 ft x 14.00 ft (normal load)
130.45 m / 128.02 m x 13.41 m x 4.27 m
Armament:
10 - 5.00" / 127 mm guns (5x2 guns), 55.18lbs / 25.03kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
8 - 1.10" / 27.9 mm guns (2x4 guns), 0.67lbs / 0.30kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 1.10" / 27.9 mm guns (1x4 guns), 0.67lbs / 0.30kg shells, 1936 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1936 Model
Machine guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 560 lbs / 254 kg
Shells per gun, main battery: 360
10 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm - -
3rd: 0.50" / 13 mm - -
- Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 53,913 shp / 40,219 Kw = 35.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 504 tons
Complement:
202 - 263
Cost:
£1.834 million / $7.336 million
Distribution of weights at normal displacement:
Armament: 79 tons, 2.6 %
Armour: 63 tons, 2.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 50 tons, 1.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 13 tons, 0.4 %
Machinery: 1,374 tons, 45.9 %
Hull, fittings & equipment: 943 tons, 31.5 %
Fuel, ammunition & stores: 454 tons, 15.2 %
Miscellaneous weights: 80 tons, 2.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
862 lbs / 391 Kg = 13.8 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 1.8 ft / 0.6 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.58
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.405
Length to Beam Ratio: 9.55 : 1
'Natural speed' for length: 23.78 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 1.50 ft / 0.46 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 22.50 ft / 6.86 m
- Mid (50 %): 15.25 ft / 4.65 m
- Quarterdeck (15 %): 15.25 ft / 4.65 m
- Stern: 15.25 ft / 4.65 m
- Average freeboard: 18.07 ft / 5.51 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 173.5 %
- Above water (accommodation/working, high = better): 118.5 %
Waterplane Area: 11,841 Square feet or 1,100 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 44 lbs/sq ft or 215 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.66
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
20 tons for sonar and depth charges
20 tons for radar
40 tons reserved for future growth
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