Aerospace

Summary of suborbital astronaut wings flights

Note	Only two X-15 flights, both performed by Joseph Walker, reached over 100 km (62.137 mi or 328,084 ft) according to the Fédération Aéronautique Internationale (FAI) definition. Astronaut wings flights, according to the USAF definition, exceeded 50 miles (80.467 km or 264,000 ft) altitude.

No.	Pilot's name	Total flights	Date of record flight	Aircraft	Flight no.	Max. altitude (apogee)	Remarks

1	Michael J. Adams †	1	15/11/1967	X-15A	191	81,080 m	Fatal accident, aircraft destroyed. After reaching peak altitude, X-15A spun out of control and ultimately disintegrated. Max. speed: 5,744 km/h
2	Brian Binnie	1	04/10/2004	SpaceShipOne SS1	17P	111,996 m	Second successful flight to win Ansari X Prize; unofficial world altitude record.
3	William H. Dana	2	01/11/1966 21/08/1968	X-15A	174 197	93,540 m 81,530 m	Max. speed: 6,034 km/h Max. speed: 5,540 km/h
4	Joseph Engle	3	29/06/1965 10/08/1965 14/10/1965	X-15A	138 143 153	85,527 m 82,601 m 81,230 m	Max. speed: 5,522 km/h Max. speed: 5,712 km/h Max. speed: 5,718 km/h
5	William (Pete) Knight †	1	17/10/1967	X-15A	190	85,500 m	Max. speed: 6,204 km/h; made the fastest X-15 flight (no. 188, 03/10/1967) ever, reaching 7,273 km/h (Mach 6.7)
6	John B. McKay †	1	28/09/1965	X-15A	150	90,099 m	Max. speed: 6,005 km/h
7	Mike Melvill	2	21/06/2004 29/09/2004	SpaceShipOne SS1	15P 16P	100,124 m 102,922 m	First private astronaut wings flight. First successful flight required to win Ansari X Prize.
8	Joseph Walker †	3	17/01/1963 19/07/1963 22/08/1963	X-15A	77 90 91	82,810 m 106,010 m 107,960 m	Max. speed: 5,917 km/h; first civilian flight above 80 km. Max. speed: 5,969 km/h; first of only two X-15 astronaut flights according to FAI definition. Max. speed: 6,105 km/h
9	Robert M. White	1	17/07/1962	X-15A	62	95,940 m	Then official FAI world altitude record; max. speed: 6,166 km/h