Short Mark 7 torpedo

Short Mark 7 torpedo
Dummy Mark 7 Type D torpedo being dropped from a Curtis R-6L ca. 1919
Type	Torpedo
Place of origin	United States
Service history
Used by	United States Navy
Production history
Designer	Washington Navy Yard[1]
Designed	1917[1]
Specifications
Mass	1036 pounds[1]
Length	144 inches[1]
Diameter	17.7 inches (45 centimeters)[1]
Effective firing range	2000 yards[1]
Warhead weight	281 pounds[1]
Detonation mechanism	Mk 3 contact exploder[1]
Engine	Turbine[1]
Maximum speed	35 knots
Guidance system	Gyroscope[1]
Launch platform	Submarines[1]

The Short Mark 7 torpedo was a variant of the Bliss-Leavitt Mark 7 torpedo developed by the Washington Navy Yard in order to fit certain submarine torpedo tubes in 1917. The Short Mark 7, also designated Torpedo Type D,^[2] had an air flask that was shortened and a reduced warhead weight. The fuel and water tanks were relocated to obtain more air flask capacity; the fuel tank was mounted in the aft air flask bulkhead, while the water tanks were mounted in the after-body. The overall weight of the warshot torpedo was 590 pounds lighter and 58 inches shorter than the Mark 7. The air, fuel and water capacities were approximately one-third of the capacities found on the full-size Mark 7. This torpedo was never produced in quantity.^[1]