| 61 cm Type 90 torpedo | |
|---|---|
 Triple 61 cm torpedo launchers on the Yūgure | |
| Type | Torpedo |
| Place of origin | Empire of Japan |
| Service history | |
| In service | 1933 - 1945 |
| Used by | Imperial Japanese Navy |
| Wars | Second World War |
| Production history | |
| Designed | 1928-1932 |
| Manufacturer | Kure, Yokosuka and Sasebo Naval Arsenals |
| Specifications | |
| Mass | 2.54 tonnes (2.50 long tons; 2.80 short tons) |
| Length | 8.485 m (27 ft 10.1 in) |
| Diameter | 60.9 cm (24.0 in) |
| Effective firing range | 7,000 m (7,700 yd) (at 46 knots) |
| Maximum firing range | 15,000 m (16,000 yd) (at 35 knots) |
| Warhead | Type 97 (60% TNT, 40% HND) |
| Warhead weight | 400 kg (880 lb) |
| Engine | 2-cylinder double-action |
| Maximum speed | 46 knots (85 km/h) |
The Type 90 Pneumatic Torpedo (九〇式空気式魚雷, designated for Imperial Japanese calendar year 2590) was a 61 cm (24 in)-diameter surface-fired torpedo used by the Imperial Japanese Navy during World War II. It was notably first used in the Hatsuharu-class destroyers and in most cruisers, including the Furutaka, Aoba, Myoko, Takao, and Mogami-class heavy cruisers after refits during the 1930s. It is an evolution of the 8th Year Type torpedo and was superseded by the Type 93 oxygen torpedo, commonly called the Long Lance, as oxygen generating equipment was installed aboard surface ships.