X-4 pilots

PilotAgencyFlightsAircraft 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

X-4 flights VehicleFlight #DatePilotAircraftAgencyVelocity-Mach-Altitude- m -Comments X-4 #1 August 18, 1950 Chuck Yeager 46-677 USAF 1 ? ? Air Force flight. Pilot familiarization. X-4 #2 August 22, 1950 Frank Everest 46-677 USAF 2 ? ? Air Force flight. Pilot familiarization. X-4 #3 August 22, 1950 Frank Everest 46-677 USAF 3 ? ? Aborted, landing gear malfunction. X-4 #4 August 30, 1950 Frank Everest 46-677 USAF 4 ? ? Handling qualities. X-4 #5 August 31, 1950 Frank Everest 46-677 USAF 5 ? ? Same as flight 4. X-4 #6 September 8, 1950 Chuck Yeager 46-677 USAF 6 ? ? Longitudinal and latitudinal stability and control. X-4 #7 September, 1950 Chuck Yeager 46-677 USAF 7 ? ? Aborted, faulty canopy lock. X-4 #8 September, 1950 Chuck Yeager 46-677 USAF 8 ? ? Longitudinal and latitudinal dynamic stability and control. X-4 #9 September, 1950 Chuck Yeager 46-677 USAF 9 ? ? Same as flight 8. X-4 #10 September, 1950 Chuck Yeager 46-677 USAF 10 ? ? Same as flight 8. X-4 #11 September, 1950 Chuck Yeager 46-677 USAF 11 ? ? Same as flight 8. X-4 #12 September 22, 1950 - 46-677 USAF 12 ? ? Air Force flight. Pilot familiarization. X-4 #13 September-November, 1950 A. Boyd 46-677 USAF 13 ? ? Air Force flight. Pilot familiarization. X-4 #14 September-November, 1950 J.S. Nash 46-677 USAF 14 ? ? Air Force flight. Pilot familiarization. Airspeed calibration. X-4 #15 September-November, 1950 John Griffith 46-677 NACA 1 ? ? First NACA pilot checkflight. X-4 #16 September-November, 1950 John Griffith 46-677 NACA 2 ? ? Longitudinal, latitudinal, directional stability, and control. X-4 #17 September-November, 1950 John Griffith 46-677 NACA 3 ? ? Same as flight 16. X-4 #18 September-November, 1950 John Griffith 46-677 NACA 4 ? ? Same as flight 16. X-4 #19 September-November, 1950 John Griffith 46-677 NACA 5 ? ? Same as flight 16. X-4 #20 November 7, 1950 John Griffith 46-677 NACA 6 ? ? Same as flight 16. X-4 #21 November 17, 1950 John Griffith 46-677 NACA 7 ? ? Same as flight 16. X-4 #22 December 6, 1950 R.L. Johnson 46-677 USAF 15 ? ? Air Force flight. Pilot familiarization. X-4 #23 December 6, 1950 Scott Crossfield 46-677 NACA 8 ? ? NACA pilot checkflight. Aborted. X-4 #24 December 15, 1950 Scott Crossfield 46-677 NACA 9 ? ? Aborted; instrument malfunction. X-4 #25 December 28, 1950 Scott Crossfield 46-677 NACA 10 ? ? Longitudinal, latitudinal, directional stability and control. X-4 #26 January 4, 1951 Scott Crossfield 46-677 NACA 11 ? ? Same as flight 25. X-4 #27 January 17, 1951 Scott Crossfield 46-677 NACA 12 ? ? Same as flight 25. X-4 #28 January 19, 1951 Scott Crossfield 46-677 NACA 13 ? ? Aborted, landing gear malfunction. X-4 #29 January 24, 1951 Scott Crossfield 46-677 NACA 14 ? ? Aborted, instrument malfunction. X-4 #30 January 26, 1951 Scott Crossfield 46-677 NACA 15 ? ? Longitudinal, latitudinal, directional stability and control. X-4 #31 February 19, 1951 Scott Crossfield 46-677 NACA 16 ? ? Same as flight 30. X-4 #32 March 19, 1951 Scott Crossfield 46-677 NACA 17 ? ? Same as flight 30. X-4 #33 March 26, 1951 Scott Crossfield 46-677 NACA 18 ? ? Same as flight 30. X-4 #34 March 28, 1951 Scott Crossfield 46-677 NACA 19 ? ? Same as flight 30. X-4 #35 April 12, 1951 Scott Crossfield 46-677 NACA 20 ? ? Same as flight 30. X-4 #36 April 13, 1951 Scott Crossfield 46-677 NACA 21 ? ? Same as flight 30. X-4 #37 April 17, 1951 Scott Crossfield 46-677 NACA 22 ? ? Same as flight 30. X-4 #38 April 20, 1951 W.P. Jones 46-677 NACA 23 ? ? NACA pilot check. X-4 #39 April 26, 1951 Scott Crossfield 46-677 NACA 24 ? ? Longitudinal, latitudinal, directional stability, and control. X-4 #40 April 27, 1951 W.P. Jones 46-677 NACA 25 ? ? Same as flight 39. X-4 #41 May 3, 1951 W.P. Jones 46-677 NACA 26 ? ? Same as flight 39. X-4 #42 May 9, 1951 Scott Crossfield 46-677 NACA 27 ? ? Same as flight 39. X-4 #43 May 16, 1951 Scott Crossfield 46-677 NACA 28 ? ? Same as flight 39. X-4 #44 May 18, 1951 Scott Crossfield 46-677 NACA 29 ? ? Same as flight 39. X-4 #45 May 29, 1951 Scott Crossfield 46-677 NACA 30 ? ? Same as flight 39. X-4 #46 August 20, 1951 W.P. Jones 46-677 NACA 31 ? ? First flight with thick trailing edge on speed brakes. X-4 #47 October 2, 1951 Scott Crossfield 46-677 NACA 32 ? ? Stability and control with thick trailing edge. X-4 #48 October 5, 1951 Scott Crossfield 46-677 NACA 33 ? ? Lift-to-drag variation using various speedbrake settings. X-4 #49 October 9, 1951 Scott Crossfield 46-677 NACA 34 ? ? Landings at various lift-to-drag ratios. X-4 #50 October 11, 1951 Scott Crossfield 46-677 NACA 35 ? ? Same as flight 49. X-4 #51 October 12, 1951 W.P. Jones 46-677 NACA 36 ? ? Same as flight 49. X-4 #52 October 17, 1951 W.P. Jones 46-677 NACA 37 ? ? Constant speed-drag ratios. X-4 #53 October 18, 1951 Joseph Walker 46-677 NACA 38 ? ? NACA pilot check; handling qualities. X-4 #54 October 19, 1951 Joseph Walker 46-677 NACA 39 ? ? Maneuvers and speed runs. X-4 #55 October 24, 1951 W.P. Jones 46-677 NACA 40 ? ? General stability and control. X-4 #56 March 6, 1952 W.P. Jones 46-677 NACA 41 ? ? Lift-to-drag at various speedbrake settings. X-4 #57 March 13, 1952 W.P. Jones 46-677 NACA 42 ? ? Directional trim change invest. X-4 #58 March 17, 1952 W.P. Jones 46-677 NACA 43 ? ? Lift-to-drag variation with speedbrakes. X-4 #59 March 21, 1952 W.P. Jones 46-677 NACA 44 ? ? Lift-to-drag variation studies. X-4 #60 March 25, 1952 W.P. Jones 46-677 NACA 45 ? ? Dynamic stability invest. X-4 #61 March 26, 1952 W.P. Jones 46-677 NACA 46 ? ? Same as flight 60. X-4 #62 March 27, 1952 S.P. Butchart 46-677 NACA 47 ? ? NACA pilot check. X-4 #63 May 19, 1952 W.P. Jones 46-677 NACA 48 ? ? Check flight with thickened trailing edge on elevons. X-4 #64 August 6, 1952 Scott Crossfield 46-677 NACA 49 ? ? Stability and control with thickened elevons. X-4 #65 August 11, 1952 - 46-677 NACA 50 ? ? Aborted; engine malfunction. X-4 #66 September 16, 1952 - 46-677 NACA 51 ? ? Aborted; instrument malfunction. X-4 #67 September 22, 1952 - 46-677 NACA 52 ? ? - X-4 #68 September 23, 1952 Scott Crossfield 46-677 NACA 53 ? ? Stability and control with thickened elevons. X-4 #69 March 27, 1953 Scott Crossfield 46-677 NACA 54 ? ? Same as flight 68. X-4 #70 April 29, 1954 Scott Crossfield 46-677 NACA 55 ? ? Airspeed calibration with thickened elevons. X-4 #71 April 30, 1954 Scott Crossfield 46-677 NACA 56 ? ? High-lift stability and control. X-4 #72 May 20, 1954 S.P. Butchart 46-677 NACA 57 ? ? Dynamic stability without thickened elevons. X-4 #73 July 1, 1954 S.P. Butchart 46-677 NACA 58 ? ? Same as flight 72. X-4 #74 July 3, 1954 S.P. Butchart 46-677 NACA 59 ? ? Same as flight 72. X-4 #75 July 3-August, 1954 George Cooper 46-677 NACA 60 ? ? NACA pilot check for Ames pilot. X-4 #76 August 11, 1954 John McKay 46-677 NACA 61 ? ? NACA pilot check. X-4 #77 August, 1954 - 46-677 NACA 62 ? ? Dynamic Stability. X-4 #78 August, 1954 - 46-677 NACA 63 ? ? Dynamic Stability. X-4 #79 August 31, 1954 - 46-677 NACA 64 ? ? NACA pilot check. X-4 #80 September, 1954 - 46-677 NACA 65 ? ? NACA pilot check. X-4 #81 September, 1954 - 46-677 NACA 66 ? ? NACA pilot check. X-4 #82 September, 1954 - 46-677 NACA 67 ? ? Aileron pulses, low-speed turns with dive brakes.

See also X-4 Bantam Chuck Yeager Scott Crossfield John McKay Joseph Walker