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Quoted
CS27, French Submarine laid down 1927
Displacement:
437 t light; 448 t standard; 508 t normal; 556 t full load
Dimensions: Length overall / water x beam x draught
149.28 ft / 149.28 ft x 19.69 ft x 9.84 ft (normal load)
45.50 m / 45.50 m x 6.00 m x 3.00 m
Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1927 Model
Quick firing gun in deck mount
on centreline forward
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1927 Model
Anti-aircraft gun in deck mount
on centreline aft
Weight of broadside 15 lbs / 7 kg
Shells per gun, main battery: 150
4 - 21.7" / 550 mm above water torpedoes
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 1 shaft, 497 shp / 370 Kw = 12.00 kts
Range 6,500nm at 10.00 kts
Bunker at max displacement = 108 tons
Complement:
53 - 69
Cost:
£0.069 million / $0.277 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0.4 %
Machinery: 16 tons, 3.1 %
Hull, fittings & equipment: 309 tons, 60.9 %
Fuel, ammunition & stores: 71 tons, 14.0 %
Miscellaneous weights: 110 tons, 21.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
740 lbs / 336 Kg = 57.5 x 3.0 " / 75 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 0.6 ft / 0.2 m
Roll period: 10.5 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.615
Length to Beam Ratio: 7.58 : 1
'Natural speed' for length: 12.22 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 37.8 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,137 Square feet or 198 Square metres
Displacement factor (Displacement / loading): 325 %
Structure weight / hull surface area: 108 lbs/sq ft or 525 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 4.52
- Longitudinal: 2.25
- Overall: 2.68
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability
Forum Software: Burning Board® Lite 2.1.2 pl 1, developed by WoltLab® GmbH