List of X-4 flights

X-4 pilots

{| class="wikitable"

! width="125" |Pilot

! width="100" |Agency

! width="50" |Flights

! width="175" |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

X-4 flights

{| class="wikitable"

! width="65" |Vehicle<br>Flight #

! width="120" |Date

! width="125" |Pilot

! width="50" |Aircraft

! width="65" |Agency

! width="50" |Velocity<br>-Mach-

! width="50" |Altitude<br>- m -

! width="175" |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.

X-4 pilots

X-4 flights

See also