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Navy news

The Last World War 1 ligth cruiser HMAS Woomargama is just out of NO1 dry dock javes bay just afthere her refit with new oil fired power plant. it is reported by the navy that the ship can now make 32kts at 88,777 shp on her trials of the New South Wales Coast the old coal speed was 25kts at 25,000 shp hear are new statss releast by the Navy Comaned for the rebuilt ships there are ten rebuilt for the fleet under the 1918 to 1920 programe .


Chatham, UK Aust ligth Cruuiser laid down 1914

Displacement:
6,168 t light; 6,385 t standard; 7,049 t normal; 7,552 t full load
Loading submergence 462 tons/feet

Dimensions:
430.00 ft x 49.60 ft x 17.50 ft (normal load)
131.06 m x 15.12 m x 5.33 m

Armament:
8 - 6.00" / 152 mm guns
4 - 3.00" / 76 mm AA guns
5 - 0.20" / 5 mm guns
Weight of broadside 918 lbs / 416 kg
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 3.00" / 76 mm, ends unarmoured
Belts cover 90 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main gun shields 3.00" / 76 mm
Armour deck 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 88,777 shp / 66,228 Kw = 32. kts
Range 4,400nm at 15.00 kts

Complement:
384 - 500

Cost:
£0.876 million / $3.505 million

Distribution of weights at normal displacement:
Armament: 115 tons, 1.6 %
Armour: 922 tons, 13.1 %
Belts: 265 tons, 3.8 %, Armament: 59 tons, 0.8 %, Armour Deck: 598 tons, 8.5 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,688 tons, 38.1 %
Hull, fittings & equipment: 2,443 tons, 34.7 %
Fuel, ammunition & stores: 881 tons, 12.5 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.8

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.01
Shellfire needed to sink: 4,546 lbs / 2,062 Kg = 42.1 x 6.0 " / 152 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.8
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 88 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.35
Relative quality as seaboat: 1.06

Hull form characteristics:
Block coefficient: 0.661
Sharpness coefficient: 0.40
Hull speed coefficient 'M': 6.86
'Natural speed' for length: 20.74 kts
Power going to wave formation at top speed: 68 %
Trim: 83
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 136.1 %
Relative accommodation and working space: 146.6 %
(Average = 100%)
Displacement factor: 98 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight / hull surface area: 90 lbs / square foot or 437 Kg / square metre)
Relative longitudinal hull strength: 2.21
(for 21.00 ft / 6.40 m average freeboard, freeboard adjustment 6.88 ft)
Relative composite hull strength: 1.08