Mark 27 Mod 4 torpedo

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Mark 27 Mod 4 torpedo
Type Acoustic torpedo[1]
Place of origin United States
Service history
In service 1946-1960
Used by United States Navy
Production history
Designer Ordnance Research Laboratory, Pennsylvania State University
Designed 1946[1]
Manufacturer Avco[1]
Naval Ordnance Station Forest Park
Produced 1946-1954[1]
Number built 3000[1]
Weight 1175 pounds[1]
Length 125.75 inches[1]
Diameter 19 inches (with 21-inch guide rails)[1]

Effective firing range 6200 yards (12 minutes search duration)[1]
Warhead Mk 27 Mod 2, HBX[1]
Warhead weight 128 pounds[1]
Mk 11 Mod 2 contact exploder

Engine Electric[1]
Speed 15.9 knots[1]

The Mark 27 Mod 4 torpedo was a submarine-launched acoustic torpedo designed by the Ordnance Research Laboratory of Pennsylvania State University in 1946 as an improved version of the Mark 27 torpedo.[1]

Fully compatible with electrical setting fire control systems through the use of the standard 65-pin umbilical cable, this weapon was in service on submarines for about ten years. It was withdrawn from service use in 1960 with the introduction of the Mark 37 torpedo.


  1. ^ a b c d e f g h i j k l m n o p Jolie, E.W. (15 September 1978). "A Brief History of US Navy Torpedo Development: Torpedo Mk27 Mod4". Retrieved 20 June 2013.