WesWorld

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Hero class, Royal Australian Navy Corvet laid down 1935

Displacement:
        840 t light; 864 t standard; 960 t normal; 1,033 t full load
        Loading submergence 101 tons/feet

Dimensions:
        188.00 ft x 25.00 ft x 11.00 ft (normal load)

Armament:
        3 - 3 " (76 mm) (2 Main turrets)
        7 - 1.56 " (40 mm) AA
        10 - 0.8 " (20 mm)
        Weight of broadside 56 lbs (26 kg)

Machinery:
        2,740 shp steam turbines, oil fired boilers = 17.00 kts, range 7,900nm at 10.00 kts

Complement:
        86 - 112

Cost:
        £0.235 million / $0.941 million

Distribution of weights at normal displacement:
        Armament: 7 tons, 0.7 %
        Machinery: 78 tons, 8.1 %
        Hull, fittings & equipment: 705 tons, 73.5 %
        Fuel, ammunition & stores: 120 tons, 12.5 %
        Miscellaneous weights: 50 tons, 5.2 %

        Metacentric height 0.7

Remarks:
        Hull space for machinery, storage & compartmentation is excellent
        Room for accommodation & workspaces is cramped
        Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
        Relative margin of stability: 1.10
        Shellfire needed to sink: 2,568 lbs = 190.2 x 3.0 " shells
        (Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
        Torpedoes needed to sink: 1.7
        (Approx number of typical torpedo hits needed to sink ship)
        Relative steadiness as gun platform: 37 %
        (Average = 50 %)
        Relative rocking effect from firing to beam: 0.19
        Relative quality as seaboat: 0.78

Hull form characteristics:
        Block coefficient: 0.65
        Sharpness coefficient: 0.42
        Hull speed coefficient 'M': 5.82
        'Natural speed' for length: 13.71 kts
        Power going to wave formation at top speed: 60 %
        Trim: 35
        (Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
        Underwater volume absorbed by magazines and engineering spaces: 39.1 %
        Relative accommodation and working space: 73.9 %
        (Average = 100%)
        Displacement factor: 366 %
        (Displacement relative to loading factors)
        Relative cross-sectional hull strength: 2.78
        (Structure weight per square foot of hull surface: 116 lbs)
        Relative longitudinal hull strength: 7.37
        (for 9.48 ft average freeboard)
        Relative composite hull strength: 3.07