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Chatham class, Royal Australian Navy Ligth Cruiser laid down 1917
Displacement:
5,988 t light; 6,198 t standard; 6,844 t normal; 7,333 t full load
Loading submergence 451 tons/feet
Dimensions:
475.00 ft x 49.56 ft x 18.50 ft (normal load)
Armament:
8 - 6 " (152 mm) (8 Main turrets x 1 guns)
1 - 3 " (76 mm) AA
4 - 0.4 " (10 mm)
Weight of broadside 878 lbs (398 kg)
2 - 21 " submerged torpedo tubes
Armour:
Armour deck 2.00 "
Machinery:
32,556 shp steam turbines, oil fired boilers = 26.00 kts, range 12,500nm at 10.00 kts
Complement:
376 - 489
Cost:
£0.852 million / $3.410 million
Distribution of weights at normal displacement:
Armament: 110 tons, 1.6 %
Armour: 584 tons, 8.5 %
Belts: 0 tons, 0.0 %, Armament: 0 tons, 0.0 %, Armour Deck: 584 tons, 8.5 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 1,193 tons, 17.4 %
Hull, fittings & equipment: 4,102 tons, 59.9 %
Fuel, ammunition & stores: 855 tons, 12.5 %
Miscellaneous weights: 0 tons, 0.0 %
Metacentric height 2.1
Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.11
Shellfire needed to sink: 9,573 lbs = 88.6 x 6.0 " 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: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.36
Relative quality as seaboat: 1.03
Hull form characteristics:
Block coefficient: 0.55
Sharpness coefficient: 0.35
Hull speed coefficient 'M': 7.65
'Natural speed' for length: 21.79 kts
Power going to wave formation at top speed: 53 %
Trim: 69
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 72.4 %
Relative accommodation and working space: 112.2 %
(Average = 100%)
Displacement factor: 178 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 2.06
(Structure weight per square foot of hull surface: 161 lbs)
Relative longitudinal hull strength: 2.34
(for 14.04 ft average freeboard)
Relative composite hull strength: 2.09
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