| Mark 11 torpedo | |
| Origin: | United States |
| Type: | Anti-surface ship torpedo[1] |
| Is Ranged: | yes |
| Is Explosive: | yes |
| Is Missile: | yes |
| Service: | 1926–1945 |
| Used By: | United States Navy |
| Wars: | World War II |
| Designer: | Washington Navy Yard Naval Torpedo Station |
| Manufacturer: | Naval Torpedo Station |
| Design Date: | 1926 |
| Variants: | Mod 1[2] |
| Weight: | 3511 pounds |
| Length: | 271 inches |
| Diameter: | 21 inches |
| Range: | 6000-15,000 yards |
| Filling: | Mk 11, TNT |
| Filling Weight: | 500 pounds |
| Detonation: | Mk 3, Mod 1 contact exploder |
| Engine: | Turbine |
| Speed: | 27-46 knots |
| Guidance: | Gyroscope |
| Launch Platform: | Destroyers |
The Mark 11 torpedo was the first American torpedo to be designed within the United States Navy without collaboration from industry.[1] It was developed by the Washington Navy Yard in Washington, D.C., and the Naval Torpedo Station in Newport, Rhode Island. The Mark 11 torpedo was also the first to feature a three-speed setting capability while tube-loaded: high at 46 knots, medium at 34 knots and low at 27 knots. Due to stability problems it was supplemented by the Mark 12 torpedo within two years, which had a 44-knot high speed setting.