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Noumea class French Mine Warfare Ship, laid down 1922
Length, 70.0 m x Beam, 8.0 m x
Depth, 2.6 m
589 tonnes normal displacement (496 tonnes standard)
Main battery: 1 x 7.5-cm
AA battery: 2 x
4.0-cm
Light battery: 2 x 1.3-cm
Weight of broadside: 8 kg
50 tons minesweeping equipment
100 tons
mines
Hull unarmored
Battery armor:
Main, 2.5 cm shields
AA, 2.5 cm shields
Maximum speed
for 2585 shaft kw = 20.50 knots
Approximate cruising radius, 6000 nm / 12 knots
Typical complement: 60-78
Estimated
cost, $383,000 (£96,000)
Remarks:
Ship has slow, easy roll; a good, steady gun platform.
Good seaboat;
rides out heavy weather easily.
Cramped ship; poor crew accommodation, limited working space.
Distribution
of weights:
Percent
normal
displacement:
Armament ......................... 2 tonnes = 0 pct
Armor,
total ..................... 1 tonnes = 0 pct
Armament 1 tonnes = 0 pct
Machinery ........................
118 tonnes = 20 pct
Hull and fittings; equipment ..... 212 tonnes = 36 pct
Fuel, ammunition, stores ......... 106
tonnes = 18 pct
Miscellaneous weights ............ 150 tonnes = 25 pct
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589 tonnes = 100 pct
Estimated
metacentric height, 0.2 m
Displacement summary:
Light ship: 483 tonnes
Standard displacement: 496 tonnes
Normal service: 589 tonnes
Full load: 661 tonnes
Loading submergence 303 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.01
Shellfire
needed to sink: 331 kg = 56.5 x 7.5-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 0.5
(Approximates number of 'typical'
torpedo hits
needed to sink ship)
Relative steadiness as gun platform, 70 percent
(50 percent is 'average')
Relative
rocking effect from firing to beam, 0.04
Relative quality as a seaboat: 1.21
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Hull
form characteristics:
Block coefficient: 0.40
Sharpness coefficient: 0.31
Hull speed coefficient 'M' = 8.37
'Natural speed' for length = 15.2 knots
Power going to wave formation
at top speed: 53 percent
Estimated
hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 96
percent
Relative accommodation and working space: 89 percent
Displacement factor: 146 percent
(Displacement
relative to loading factors)
Relative cross-sectional hull strength: 0.95
(Structure weight per square
metre
of hull surface: 179 kg)
Relative longitudinal hull strength: 1.71
(for 2.62 m average freeboard)
Relative
composite hull strength: 1.01
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[Machine-readable parameters: Spring Style v.
1.2.1]
229.60 x 26.24 x 8.66; 8.60 -- Dimensions
0.40 -- Block coefficient
1922 -- Year laid down
20.50
/ 6000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
150 tons -- Miscellaneous weights
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1 x 2.95; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
0 -- No secondary battery
2 x 1.57 -- Tertiary (QF/AA) battery
Gun-shields
:
2 x 0.51 -- Fourth (light) battery
0 -- No torpedo
armament
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0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.98 / 0.00 / 0.98 / 0.00 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
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