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The Lockheed C121 Constellation is a military transport version of the Lockheed Constellation. A total of 332 aircraft were constructed for both the United States Air Force and United States Navy for various purposes. Numerous airborne early warning versions were also constructed. The C121 later saw service with smaller civilian operators until 1993.


Design and development

VC121A 480614 Columbine, the personal transport of General Dwight D. Eisenhower, on display at the Pima Air & Space Museum

A C121C aircraft, formerly USAF 540153, operated by the Super Constellation Flyers Association in Switzerland
Lockheed's first attempt at a military version of the Constellation airliner had been unsuccessful. This was largely due to the problems encountered by the Wright R3350 engines that powered the aircraft. After the war, the few military Constellations built (designated C69) were retrofitted by Lockheed for use in the postwar airline industry as the L049.