Bliss-Leavitt Mark 7 torpedo

Bliss-Leavitt Mark 7 torpedo
Bliss-Leavitt Mark 7 torpedo outside the torpedo factory on Goat Island, Newport, Rhode Island, August 1913.
Type	Anti-surface ship torpedo
Place of origin	United States
Service history
In service	1912–1945
Used by	United States Navy
Wars	World War II
Production history
Designer	Frank McDowell Leavitt
Designed	1911
Manufacturer	E. W. Bliss Company
No. built	240
Variants	Short Mark 7 torpedo Mod A Mod 2A Mod 5A
Specifications
Weight	1628 pounds
Length	204 inches
Diameter	17.7 inches (45 centimeters)
Effective firing range	3500-6000 yards
Warhead	Mk 7 Mod 5, TNT or Torpex
Warhead weight	326 pounds
Detonation mechanism	Mk 3 Mod 1 contact exploder
Engine	Turbine
Speed	35 knots
Guidance system	Gyroscope
Launch platform	Destroyers and submarines

The Bliss-Leavitt Mark 7 torpedo was a Bliss-Leavitt torpedo developed and produced by the E. W. Bliss Company and the Naval Torpedo Station in Newport, Rhode Island in 1911. The Mark 7 was a major step in the evolution of the modern torpedo. This innovative design featured the use of steam, generated from water sprayed into the combustion pot along with the fuel. The resulting mixture dramatically boosted the efficiency of the torpedo, leading to markedly improved performance. The Mark 7 torpedo was issued to the US Navy fleet in 1912 and remained in service through World War II. This torpedo was also experimented on as an aircraft-launched weapon in the early 1920s.