English: The M2-F1, the unlikely forefather of the NASA space shuttle, was the world's first manned lifting body. Made of wood with an internal framework of steel tubes and no wings, the M2-F1 looked more like a bathtub sitting on a tricycle than an aircraft.

Conceived by NASA engineers at the Ames Research Center, the lifting body was intended as an alternative to a capsule spacecraft, which returned to Earth dangling under a parachute. A lifting body was not a conventional winged aircraft, but rather, used air flowing over its fuselage to generate lift. This design allowed it to land on a runway like a conventional airplane.

Because the M2-F1 was unpowered, a tow vehicle was required. The solution: a 1963 Pontiac convertible, which when modified, was capable of reaching 110 miles per hour with the M2-F1 in tow.