This concept model of a partially reusable space transportation system was designed by North American Rockwell during the third and final phase (C/D) of Space Shuttle studies commissioned by NASA. Presented in 1972, the design featured a two stage launch platform - two solid rocket boosters (SRBs) and one delta-wing orbiter vehicle (all reusable) with an external (and expendable) liquid fuel tank.
While initial design studies explored a fully reusable system, the partially reusable concept ultimately prevailed. In July 1972 NASA awarded North American Rockwell the Space Shuttle development contract on the basis of this design. After further design revisions, testing, and production during the mid to late 1970's, Rockwell delivered the Space Shuttle system that began flying in 1981.
NASA transferred this model to the Museum in 1976.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.