Japanese submarine I-40

History
Japan
NameSubmarine No. 370
BuilderKure Naval Arsenal
Laid down18 March 1942
RenamedI-40 on 20 August 1942
Launched10 November 1942
Completed31 July 1943
Commissioned31 July 1943
FateMissing after 22 November 1943
Stricken30 April 1944
General characteristics
Class & typeType B2 submarine
Displacement
  • 2,624 tons surfaced
  • 3,700 tons submerged
Length356.5 ft (108.7 m)
Beam30.5 ft (9.3 m)
Draft17 ft (5.2 m)
Propulsion
  • 2 diesels: 11,000 hp (8,200 kW)
  • Electric motors: 2,000 hp (1,500 kW)
Speed
  • 23.5 knots (43.5 km/h) surfaced
  • 8 knots (15 km/h) submerged
Range14,000 nautical miles (26,000 km) at 16 knots (30 km/h)
Test depth100 m (330 ft)
Complement114
Armament

I-40 was an Imperial Japanese Navy Type B2 submarine. Completed and commissioned in 1943, she served in World War II and disappeared after departing for her first war patrol in November 1943.

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