This card shows an early McDonnell-Douglas design for NASP. A relatively fat lifting body design, this has many similarities to hypothetical “Aurora” hypersonic spyplane designs bandied about at the same time. This is not surprising… this NASP design is similar to any of a number of hypersonic configurations tested in NASA wind tunnels and shown publicly.
Note that the text on the back of the card describes a vehicle somewhat different than what NASP was supposed to be. The claim is made that the scramjets could power the vehicle Mach 25, orbital velocity… of they could allow the vehicle to cruise at Mach 6 for long range hypersonic transport. Early on in the program, the “Orient Express” was touted as a logical result of NASP work, but that quickly faded.
High resolution versions of these can be downloaded HERE.