Northrop M2-F2 lifting body aircraft engine thruster, measuring approximately 5 x 6.5 x 9, with a nozzle measuring 2.25″ in diameter. Includes its original 1970 NASA-FRC parts control tag, identifying it as “Rocket Motor 500…M2F2 100 SN 14.” In fine condition. These thrusters were installed as pairs in the rear of the M2-F2, which crashed on May 10, 1967; footage from the crash was later used in the opening sequence of the television show The Six Million Dollar Man. The aircraft was rebuilt as the M2-F3, which made its first flight on June 2, 1970, before being retired in 1972 and donated to the Smithsonian’s National Air and Space Museum.