| British 24.5-inch torpedo | |
| Origin: | United Kingdom |
| Type: | Torpedo |
| Is Ranged: | yes |
| Is Explosive: | yes |
| Is Missile: | yes |
| Service: | 1925[1] |
| Used By: | Royal Navy |
| Design Date: | 1923 |
| Weight: | 5700lbs |
| Length: | 26inchesft7inchesin (ftin) |
| Diameter: | 24.5inches |
| Range: | 15000yd at 35kn 20000yd at 30kn |
| Filling: | TNT |
| Filling Weight: | 743lbs |
| Propellant: | Oxygen-enriched air |
| Speed: | 30kn - 35kn |
| Launch Platform: | Nelson-class battleships |
The 24.5" Mark I torpedo was a British torpedo carried only on Nelson-class battleships. This was the type of torpedo that HMS Rodney fired at the German battleship Bismarck, "the only known occasion that a battleship fired torpedoes at an enemy battleship."
This torpedo design was the inspiration for the Japanese Type 93 'Long Lance' torpedoes.