The HL-10 was a joint program between NASA and Northrop Corporation. The aircraft flew 37 times between 1966 and 1970. The HL-10 achieved the highest altitude and fastest speed of all the aircraft in the lifting body program. On Feb. 18, 1970, Air Force test pilot Peter Hoag piloted the HL-10 to Mach 1.86 (1,228 mph).
The HL-10 was a joint program between NASA and Northrop Corporation. The aircraft flew 37 times between 1966 and 1970. The HL-10 achieved the highest altitude and fastest speed of all the aircraft in the lifting body program. On Feb. 18, 1970, Air Force test pilot Peter Hoag piloted the HL-10 to Mach 1.86 (1,228 mph). Nine days later, NASA pilot Bill Dana flew the vehicle to 90,030 feet setting the altitude record for the lifting body program.