It was the first of two X-15 missions that passed the 100-km high Kármán line, the FAI definition of space, along with Flight 91 the next month.

The X-15 was flown by Joseph A. Walker, who flew both X-15 spaceflights over the Kármán line.

Maximum Altitude - 106,010 m. 80 cm diameter balloon towed on 30 m line to measure air density.

Experiments: Towed balloon, horizon scanner, photometer, infrared and ultraviolet.

Chase pilots: Crews, Dana, Rogers, Daniel and Wood.