Type 93 torpedo

The Type 93 (酸素魚雷, designated for Imperial Japanese calendar year 2593) was a 610 mm (24 in)-diameter torpedo of the Imperial Japanese Navy (IJN), launched from surface ships. It is commonly referred to as the Long Lance by most modern English-language naval historians, a nickname given to it after the war by Samuel Eliot Morison, the chief historian of the U.S. Navy, who spent much of the war in the Pacific Theater. In Japanese references, the term Sanso gyorai (酸素魚雷, lit. "oxygen torpedo") is also used, in reference to its propulsion system. It was the most advanced naval torpedo in the world at the time.

Type 93 torpedo
Type 93 torpedo, recovered from Point Cruz, Guadalcanal, on display outside U.S. Navy headquarters in Washington, D.C., during World War II
TypeTorpedo
Place of originEmpire of Japan
Service history
In service1933–1945
Used byImperial Japanese Navy
WarsSecond World War
Production history
DesignerRear Admiral Kaneji Kishimoto and Captain Toshihide Asakuma
Designed1928–1932
VariantsType 97 torpedo, Type 95 torpedo
Specifications
Mass2.7 tonnes (6000 lb)
Length9 metres (29 ft 6+516 in)
Diameter610 mm (2 ft 164 in)

Effective firing range22,000 m (24,000 yd) at 89–93 km/h (48–50 kn)
Maximum firing range40,400 m (44,200 yd) at 63–67 km/h (34–36 kn)
Warhead weight490 kg (1080 lb)

PropellantKerosene or similar oxidized with oxygen-enriched air
Maximum speed 96 km/h (52 kn)
Launch
platform
Surface ships
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