Jin-Class
Oceangoing Submarine
Ships:
J-1 laid down 1937
J-2 laid down 1937
J-3 laid down 1937
J-4 laid down 1937
Displacement:
617 t light; 632 t standard; 651 t normal; 667 t full load
Dimensions:
Length overall / water x beam x draught
173.88 ft / 173.88 ft x 22.97 ft x 14.27 ft (normal load)
53.00 m / 53.00 m x 7.00 m x 4.35 m
Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1937 Model
Breech loading gun in deck mount
on centreline forward
1 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1937 Model
Anti-aircraft gun in deck mount
on centreline amidships
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 150
5 - 21.0" / 533.4 mm submerged torpedo tubes
Machinery:
Diesel Internal combustion engines plus batteries,
Electric cruising motors plus geared drives, 2 shafts, 731 shp / 546 Kw = 13.00 kts
Range 4,000nm at 7.00 kts
Bunker at max displacement = 35 tons
Complement:
63 - 83
Cost:
£0.145 million / $0.581 million
Distribution of weights at normal displacement:
Armament: 3 tons, 0.4%
Machinery: 20 tons, 3.1%
Hull, fittings & equipment: 474 tons, 72.8%
Fuel, ammunition & stores: 35 tons, 5.3%
Miscellaneous weights: 120 tons, 18.4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
482 lbs / 219 Kg = 23.2 x 3.5 " / 88 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 0.7 ft / 0.2 m
Roll period: 11.2 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: 0.400
Length to Beam Ratio: 7.57 : 1
'Natural speed' for length: 13.19 kts
Power going to wave formation at top speed: 39 %
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): 73.2%
- Above water (accommodation/working, high = better): 0.0%
Waterplane Area: 2,458 Square feet or 228 Square metres
Displacement factor (Displacement / loading): 359%
Structure weight / hull surface area: 128 lbs/sq ft or 626 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 4.14
- Longitudinal: 4.16
- Overall: 4.14
Only for chinese use; not official
Diving depth: 414 feet
Emergency Depth: 621 feet
Crush Depth: 1035 feet
Thanks to Daidalos for the drawing