This is a plastic desktop model of the X-7 ramjet vehicle. Lockheed built these vehicles in the 1950s for the Air Force for engine and flight research. Carried aloft by a B-29 or B-50, the booster ignited after launch, was jettisoned, and the ramjet then took over. Assisted by parachutes, the X-7 eventually returned to Earth. The maximum speed reached by an X-7 was 2,000 mph.
Lockheed made the model and donated it to the Museum in 1958.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.