The Mark 34 torpedo was a U.S.

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 torpedo developed that entered service in 1948. It was an improved version of the Mark 24 FIDO

Mark 24 FIDO Torpedo

The Mark 24 Mine was a US air-dropped passive acoustic homing anti-submarine torpedo used during the Second World War against German and Japanese submarines. It entered service in March 1943 and continued in service with the US Navy until 1948...

 passive acoustic homing

Acoustic homing

Acoustic homing is a system which uses sound to guide a moving object, such as a torpedo. Acoustic homing can be either Passive or Active in nature....

 torpedo

Torpedo

The modern torpedo is a self-propelled missile weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with it or in proximity to it.The term torpedo was originally employed for...

 developed during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 for launch from fixed-wing aircraft. The principal differences from the Mark 24 were the use of two propulsion batteries, which could be used in parallel while the torpedo was searching for a target to provide greater endurance and in series to provide greater speed in attack mode.

Approximately 4,050 were produced between 1948 and 1954 before production was ceased. The torpedo was replaced in U.S. service with the Mark 43 torpedo

Mark 43 torpedo

The 10" Mark 43 torpedo was the first and smallest of the United States Navy light-weight anti-submarine torpedoes. This electrically propelled 10-inch torpedo was 92 inches long and weighed 265 pounds . The torpedo was designed for air or surface launch...

 around 1958.

Specifications

• Length : 125 inches
• Diameter : 19 inches
• Fin span : 26.4 inches
• Weight : 1,150 lb
• Warhead : 116 lb HBX
  HBX
  HBX is a family of binary explosives that are composed of RDX, TNT, powdered aluminium, and D-2 wax with calcium chloride. It is used in missile warheads and underwater ordnance....
  
  
• Speed :
  • 11 knots (search mode)
  • 17 knots (attack mode)
• Range and endurance :
  • 30 minutes or 12000 yards (10,972.8 m) at 11 knots (22 km/h)
  • 6 to 8 minutes or 3600 yards (3,291.8 m) at 17 knots (33 km/h)