H-class , Atlantis Destroyer leader laid down 1928
Hatchet, Hero, Harangue, Hazard
Hasty, Hammer, Harpoon, Hawk
Hind, Havock, Hostile, Hardy
Hornet, Hunter, Harbinger, Harrier
H-class , Atlantis Destroyer laid down 1928
Displacement:
1,768 t light; 1,866 t standard; 2,074 t normal; 2,241 t full load
Dimensions: Length overall / water x beam x draught
386.42 ft / 375.00 ft x 36.00 ft x 12.25 ft (normal load)
117.78 m / 114.30 m x 10.97 m x 3.73 m
Armament:
6 - 5.10" / 130 mm guns (3x2 guns), 66.33lbs / 30.09kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.57" / 40 mm guns in single mounts, 1.93lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
4 - 0.788" / 20 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 403 lbs / 183 kg
Shells per gun, main battery: 250
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.79" / 20 mm -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 42,976 shp / 32,060 Kw = 33.00 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 374 tons
Complement:
153 - 199
Cost:
£0.961 million / $3.843 million
Distribution of weights at normal displacement:
Armament: 50 tons, 2.4 %
Armour: 18 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 18 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,053 tons, 50.8 %
Hull, fittings & equipment: 622 tons, 30.0 %
Fuel, ammunition & stores: 306 tons, 14.7 %
Miscellaneous weights: 25 tons, 1.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
518 lbs / 235 Kg = 7.8 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.8 ft / 0.5 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.439
Length to Beam Ratio: 10.42 : 1
'Natural speed' for length: 19.36 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.50 ft / 7.47 m
- Forecastle (20 %): 20.50 ft / 6.25 m
- Mid (45 %): 20.50 ft / 6.25 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (12 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 15.32 ft / 4.67 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 184.9 %
- Above water (accommodation/working, high = better): 104.5 %
Waterplane Area: 8,536 Square feet or 793 Square metres
Displacement factor (Displacement / loading): 66 %
Structure weight / hull surface area: 38 lbs/sq ft or 184 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.60
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
12 tons for DC's and equipment
9 tons for sonar
2 tons for gunnery computer
2 tons for future growth