WesWorld

Repository for data pertaining to the subject.

(Historical data)

SC Class, Germany designed Peruvian U-boat

SC-1 laid down 1935 (Sunk August 18 1937)
SC-2 laid down 1935 (Scrapped 1949)
SC-3 laid down 1935 (Scrapped 1949)
SC-4 laid down 1936
SC-5 laid down 1936

Displacement:
414 t light; 424 t standard; 458 t normal; 485 t full load

Dimensions: Length overall / water x beam x draught
165.68 ft / 164.04 ft x 19.69 ft x 11.81 ft (normal load)
50.50 m / 50.00 m x 6.00 m x 3.60 m

Armament:
1 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1931 Model
Anti-aircraft gun in deck mount
on centreline aft
2 - 0.98" / 25.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Machine guns in deck mounts
on centreline, all amidships
Weight of broadside 2 lbs / 1 kg
Shells per gun, main battery: 450
4 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:

- Conning tower: 0.79" / 20 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,019 shp / 760 Kw = 15.00 kts
Range 2,500nm at 12.00 kts
Bunker at max displacement = 61 tons

Complement:
49 - 64

Cost:
£0.080 million / $0.318 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.1 %
Armour: 1 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 31 tons, 6.7 %
Hull, fittings & equipment: 282 tons, 61.6 %
Fuel, ammunition & stores: 44 tons, 9.5 %
Miscellaneous weights: 100 tons, 21.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
239 lbs / 108 Kg = 154.6 x 1.5 " / 37 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.5 ft / 0.2 m
Roll period: 11.8 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: 0.420
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 1.64 ft / 0.50 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): 98.9 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,013 Square feet or 187 Square metres
Displacement factor (Displacement / loading): 278 %
Structure weight / hull surface area: 95 lbs/sq ft or 463 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.64
- Longitudinal: 2.71
- Overall: 2.92
Hull space for machinery, storage, compartmentation is adequate
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

All tubes are forward.

12 tons of the miscellaneous tonnage are for 8 reload torpedoes.

(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