Mark 31 torpedo

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Mark 31 torpedo
Type Acoustic torpedo[1]
Place of origin United States
Service history
In service never in service
Production history
Designer Underwater Sound Laboratory, Harvard University[1]
Ordnance Research Laboratory, Pennsylvania State University
Designed 1944[1]
Manufacturer Naval Torpedo Station Newport
Weight 2800 pounds[1]
Length 246 inches[1]
Diameter 21 inches[1]

Effective firing range 4000 yards[1]
Warhead Mk 31, HBX[1]
Warhead weight 500 pounds[1]

Engine Electric[1]
Speed 29 knots[1]

The Mark 31 torpedo was a destroyer-launched acoustic torpedo developed by the Harvard and Pennsylvania State universities during World War II. A modification of the Mark 18 electric torpedo, it was conceived as an interim weapon to be used in the Pacific War until a new high-speed acoustic torpedo could be developed for the United States Navy.[1]

Further development of the torpedo was terminated due to the status of other more promising programs, notably the Mark 16 torpedo and the Mark 35 torpedo.

See also[edit]


  1. ^ a b c d e f g h i j k l m n Jolie, E.W. (15 September 1978). "A Brief History of US Navy Torpedo Development: Torpedo Mine Mk31". Retrieved 21 June 2013.