List of X-4 flights
X-4 pilots
| Pilot | Agency | Flights | Aircraft |
| A.Boyd | USAF | 1 | 46-677 |
| Frank Everest | USAF | 4 | 46-677 |
| R.L. Johnson | USAF | 1 | 46-677 |
| J.S. Nash | USAF | 1 | 46-677 |
| Chuck Yeager | USAF | 7 | 46-677 |
| S.P. Butchart | NACA | 4 | 46-677 |
| George Cooper | NACA | 1 | 46-677 |
| Scott Crossfield | NACA | 29 | 46-677 |
| John Griffith | NACA | 7 | 46-677 |
| W.P. Jones | NACA | 14 | 46-677 |
| John McKay | NACA | 1 | 46-677 |
| Joseph Walker | NACA | 1 | 46-677 |
| Charles Tucker | Northrop | 31 | 46-676/46-677 |