This is a wind tunnel model of unknown scale of the X-20 Dyna-Soar (Dynamic Soaring), a prototype for a piloted, reusable spaceplane. Originally conceived by German aerospace designer Eugen Saenger as a skip-glide rocket bomber with intercontinental range, the concept was transformed by the U.S. Air Force into a manned reconnaissance platform in space. Designed to be launched by rocket into orbit, the X-20 was a "lifting body" design and would have landed like an airplane. The Dyna-Soar program was cancelled in December 1963, before the first manned test flight that was scheduled for the following year.
NASA's Langley Research Center made and donated the model.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.