Neptune Class French Collier, laid down 1912
Length, 160.0 m x Beam, 22.0 m x Depth, 6.0 m 12776 tonnes
normal displacement (11486 tonnes standard)
Main battery: 2 x 0.8-cm
Weight of broadside: 0 kg
7600
tons cargo, 8882 GRT
Hull unarmored
Maximum speed for 5958 shaft kw = 16.00 knots Approximate cruising
radius, 10000 nm / 10 knots
Typical complement: 120-156
Estimated cost, $1.768 million (£442,000)
Remarks:
Excellent seaboat; comfortable and able to fight her guns in the heaviest weather.
Magazines and engineering
spaces are roomy, with superior watertight subdivision.
Ship is roomy, with superior accommodation and working
space.
Distribution of weights: Percent normal displacement:
Machinery ........................
350 tonnes = 3 pct Hull and fittings; equipment ..... 3281 tonnes = 26 pct Fuel, ammunition, stores ......... 1545
tonnes = 12 pct Miscellaneous weights ............ 7600 tonnes = 59 pct ----- 12776 tonnes = 100 pct
Estimated
metacentric height, 1.0 m
Displacement summary:
Light ship: 11231 tonnes Standard displacement: 11486
tonnes Normal service: 12776 tonnes Full load: 13757 tonnes
Loading submergence 2520 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.05
Shellfire
needed to sink: 7951 kg = 1305982.7 x 0.8-cm shells (Approximates weight of penetrating shell hits needed to sink
ship, not counting critical hits)
Torpedoes needed to sink: 2.5 (Approximates number of 'typical' torpedo
hits needed to sink ship)
Relative steadiness as gun platform, 50 percent (50 percent is 'average')
Relative
rocking effect from firing to beam, 0.00
Relative quality as a seaboat: 1.56
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Hull
form characteristics:
Block coefficient: 0.60 Sharpness coefficient: 0.40 Hull speed coefficient 'M' = 6.87
'Natural speed' for length = 22.9 knots Power going to wave formation at top speed: 30 percent
Estimated
hull characteristics and strength:
Relative underwater volume absorbed by magazines and engineering spaces: 74
percent
Relative accommodation and working space: 140 percent
Displacement factor: 154 percent (Displacement
relative to loading factors)
Relative cross-sectional hull strength: 1.02 (Structure weight per square metre
of hull surface: 427 kg)
Relative longitudinal hull strength: 1.03 (for 5.00 m average freeboard; freeboard
adjustment +0.15 m)
Relative composite hull strength: 1.02
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[Machine-readable
parameters: Spring Style v. 1.2.1]
524.80 x 72.16 x 19.68; 16.40 -- Dimensions 0.60 -- Block coefficient 1912
-- Year laid down 16.00 / 10000 / 10.00; Turbine, coal fired -- Speed / radius / cruise 7600 tons -- Miscellaneous
weights ++++++++++ 2 x 0.30; 0 -- Main battery; turrets Central positioning of guns : 0 -- No secondary
battery 0 -- No tertiary (QF/AA) battery 0 -- No fourth (light) battery 0 -- No torpedo armament ++++++++++
0.00 -- No belt armor 0.00 / 0.00 -- Deck / CT 0.00 -- No battery armor
(Note: For portability, values
are stored in Anglo-American units)
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