JB-3 Tiamat

JB-3 Tiamat.jpg
TypeAir-to-air missile
Place of originUnited States
Service history
In service1944-1947
Used byUnited States Army Air Forces
Production history
ManufacturerHughes Aircraft
Mass600 lb (270 kg)
Length14 ft 4 in (4.37 m)
WarheadHigh explosive
Warhead weight500 pounds (230 kg)

EngineDual-thrust solid rocket motor
Boost, 7,200 lbf (32 kN) for 3.5 sec
Sustain, 200 lbf (0.89 kN) for 45 sec
Speed600 miles per hour (970 km/h)
Semi-active radar homing
A-26 Invader
ReferencesOrdway and Wakeford[1]

The JB-3 Tiamat, also designated MX-570, was an early air-to-air missile developed by Hughes Aircraft for the United States Army Air Forces during World War II. Regarded as a purely experimental vehicle, test launches took place for several years before the program was terminated.

Design and development

The Tiamat project began in January 1944, when a contract was awarded to Hughes Aircraft by the U.S. Army Air Forces (USAAF) for development of an experimental subsonic, solid-fueled air-to-air missile.[1] Developed in cooperation with the National Advisory Committee for Aeronautics (NACA), Tiamat was a large missile of vaguely dart-like shape and proportion, 14 feet 4 inches (4.37 m) in length and weighing 600 pounds (270 kg), with three large stabilizing and control fins at the aft end of the missile body. The rocket motor was a boost-sustain dual-thrust type, providing 7,200 lbf (32 kN) of thrust for 3.5 seconds, followed by 200 lbf (0.89 kN) for 45 seconds of cruising flight at 600 miles per hour (970 km/h).[1] Launched from a A-26 Invader light bomber,[1] Tiamat would use semi-active radar homing to track enemy aircraft,[2] and a proximity fuze was fitted for detonation of the missile's 500 lb (230 kg) warhead.[1]

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