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Class, Japanese Midget Submarines


Specifications:


Tonnage

49.75 tons submerged

Dimensions

81'8" by 6'2" by 6'2"
24.89m by 1.88m by 1.88m

Maximum speed      

6.5 knots surfaced
18.5 knots submerged
Dive
to 100 feet
to 30 meters

Complement

2 or 3

Armament

2 18" torpedo tubes (2 torpedoes)
Machinery
1-shaft electric (600 shp) or diesel (40 hp)

Range

350 nautical miles (650 km) at 6.5 knots surfaced
120 nautical miles (220 km) at 4 knots submerged


The Type C midget submarines improved the Type A design by putting doors on the torpedo tubes and installing a diesel generator to improve the range. However, a full 18 hours was required for the generator to recharge the batteries. A few were equipped with a second periscope for training purposes.

The prototype was classifed as Type B, with the subsequent production craft classified as Type C. About 15 production craft were built in 1943-1944. Eight were lost in the Philippines in 1944-5.


References

Carpenter and Polmar (1986)

CombinedFleet.com (accessed 2009-12-8)

Jentschura, Jung, and Mickel (1977)

Navy History and Heritage Command (accessed 2009-12-8)



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