| Mark 20 torpedo | |
| Origin: | United States |
| Type: | Anti-surface ship torpedo[1] |
| Is Ranged: | yes |
| Is Explosive: | yes |
| Is Missile: | yes |
| Service: | never in service |
| Designer: | Naval Torpedo Station Newport Electric Storage Battery Company General Electric |
| Manufacturer: | General Electric |
| Design Date: | 1943 |
| Number: | 20 |
| Weight: | approx. 3100 pounds |
| Length: | 246 inches |
| Diameter: | 21 inches |
| Range: | 3500 yards |
| Filling: | Mk 20, TNT |
| Filling Weight: | 500 pounds |
| Detonation: | none assigned |
| Engine: | Electric |
| Speed: | 33 knots |
| Guidance: | Gyroscope |
| Launch Platform: | Submarines |
The Mark 20 torpedo was a US torpedo designed in 1943 but never used in service.
Design was by Naval Torpedo Station Newport, the Electric Storage Battery Company and General Electric. This project was a continuation of the development of a submarine-launched, anti-surface ship torpedo originally designated Mark 2 in 1941 which was the second attempt to develop a torpedo of this type. The earlier effort, designated Mark 1, in post-World War I years (1919–1931), was terminated after the torpedo produced proved unsatisfactory in speed and range.[1]
The Mark 20 never progressed beyond the development stage due to the success of the Mark 18 torpedo, however, 20 units were produced by General Electric for testing purposes.