(Historical data)
P-6 Class Submarine
A large class of mid-range boats meant to be really irritating for the neighbours.
P-6, laid down 1941
P-7, laid down 1942
P-8, laid down 1942
P-9, laid down 1942
P-10, laid down 1942
P-11, laid down 1943
P-12, laid down 1943
P-13, laid down 1943
P-14, laid down 1943
P-6, Peruvian Submarine, laid down 1941
Displacement:
750 t light; 772 t standard; 858 t normal; 927 t full load
Dimensions: Length overall / water x beam x draught
181.43 ft / 181.43 ft x 24.61 ft x 13.45 ft (normal load)
55.30 m / 55.30 m x 7.50 m x 4.10 m
Armament:
1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1941 Model
Dual purpose gun in deck mount
on centreline forward
1 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1941 Model
Anti-aircraft gun in deck mount
on centreline aft
1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1941 Model
Machine gun in deck mount
on centreline aft
Weight of broadside 36 lbs / 16 kg
Shells per gun, main battery: 250
6 - 21.0" / 533 mm submerged torpedo tubes
Machinery:
Diesel Internal combustion engines plus batteries,
Electric cruising motors plus geared drives, 2 shafts, 3,000 shp / 2,238 Kw = 17.85 kts
Range 8,000nm at 10.00 kts (Bunkerage = 155 tons)
Complement:
79 - 103
Cost:
£0.254 million / $1.016 million
Distribution of weights at normal displacement:
Armament: 4 tons, 0.5 %
Machinery: 79 tons, 9.2 %
Hull, fittings & equipment: 466 tons, 54.3 %
Fuel, ammunition & stores: 108 tons, 12.6 %
Miscellaneous weights: 200 tons, 23.3 %
-170 t: Ballast tanks (=19.8% of normal displacement)
-20 t: 10 reload torpedoes (8 F, 2 A) or equivalent in mines
-5 t: Sonar
-5 t: Weight Reserve
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
230 lbs / 104 Kg = 6.5 x 4.1 " / 105 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.3 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: 0.500
Length to Beam Ratio: 7.37 : 1
'Natural speed' for length: 13.47 kts
Power going to wave formation at top speed: 60 %
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): 139.0 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,974 Square feet or 276 Square metres
Displacement factor (Displacement / loading): 218 %
Structure weight / hull surface area: 112 lbs/sq ft or 545 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.48
- Longitudinal: 2.52
- Overall: 2.74
Hull space for machinery, storage, compartmentation is cramped
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