XS-1

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XS-1

XS-1
Credit: NASA

American manned rocketplane. Design begun 1943. Also known as the X-1. This rocket plane was the first aircraft to break the sound barrier, and the first in a line of X- aircraft leading to the space shuttle.

Status: Operational 1946.

Due to the press of war work, Bell Aircraft was the only company that would take on the project in 1944. German swept-wing research being unknown, the configuration developed was a thin, straight-winged aircraft with a bullet-shaped fuselage. The XS-1 began flight test in 1946 and Chuck Yeager flew it through the sound barrier on October 14, 1947.

Subtopics

X-2 American manned rocketplane. Design began 1945. X-2 was an AAF/ Bell project that flew three supersonic flight research aircraft, powered by liquid rockets. Originally designated XS-2.

X-1D American manned rocketplane. Study 1953. The X-1A, B, and D were essentially identical rocketplanes intended to reach speeds above Mach 2.

X-1A American manned rocketplane. Study 1951. The X-1A, B, and D were essentially identical rocketplanes intended to reach speeds above Mach 2.

X-1B American manned rocketplane. Flown 1952. The X-1A, B, and D were essentially identical rocketplanes intended to reach speeds above Mach 2.

X-1E American manned rocketplane. Study 1954. The X-1E was designed to test an ultra-thin 4% thickness to cord wing for supersonic flight.

Family: Rocketplane, Suborbital, US Rocketplanes. Country: USA. Engines: XLR11. Propellants: Lox/Alcohol. Launch Sites: Edwards. Agency: Bell. Bibliography: 17, 483, 49, 97.

1943 December 1 - .

NACA rocket program. - . Nation: USA. Spacecraft: XS-1. The rocket aircraft research program conceived by NACA's John Stack, to investigage the flight characteristics of an airplane flying beyond the speed of sound or Mach 1..

1944 During the Year - .

Bell Aircraft begins work on the XS-1 rocketplane. - . Nation: USA. Spacecraft: XS-1.
Due to the press of war work, Bell Aircraft was the only company that would take on the XS-1 rocketplane project. This would produce the X-1, the first aircraft to break the sound barrier, and the first in a line of X- aircraft leading to the space shuttle. German swept-wing research being unknown, the configuration developed was a thin, straight-winged aircraft with a bullet-shaped fuselage.

1944 During the Year - .

Congress appropriated funds to carry out a rocket aircraft research program. - . Nation: USA. Spacecraft: XS-1. The National Advisory Committee for Aeronautics, the Air Force, and the Navy were designated participating members..

1944 March 16 - .

NACA proposes a jet-propelled transonic research airplane. - . Nation: USA. Spacecraft: XS-1.
At a National Advisory Committee for Aeronautics (NACA) seminar, in Washington, D.C., with Air Force and Navy personnel attending, NACA personnel proposed a jet-propelled transonic research airplane be developed. This proposal ultimately led to the 'X' series research airplane projects.

1944 December 13 - .

X-1 manned supersonic rocket aircraft begun. - . Nation: USA. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. In an AAF-NACA conference, Air Force representatives indicated strong preference for use of rocket engines instead of jets in X-1 research airplane project..

1945 July - .

Goddard's rocket team ends its work. - . Nation: USA. Related Persons: Goddard. Spacecraft Bus: XS-1. Spacecraft: X-2.
Goddard's rocket team ends its work at the Naval Engineering Experiment Station at Annapolis, Maryland. During the previous three years the team had developed a variable-thrust rocket motors. This required hundreds of proving-stand tests, but eventually producing a successful motor, later used on the Bell X-2 rocket plane.

1945 December 14 - .

X-2 rocket airplane development starts. - . Nation: USA. Spacecraft Bus: XS-1. Spacecraft: X-2. AAF contracted with Bell for development of three supersonic flight research aircraft, powered by liquid rockets. Designated XS-2, and later X-2..

1946 January 19 - .

XS-1 Flight 1 - . Crew: Woolams. Payload: XS-1 # 1 flight 1. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 1. First glide flight of AAF-NACA XS-1 rocket research airplane (No.1 of the original three X-1's built), by Jack Woolams, Bell Aircraft test pilot, at Pinecastle Army Air Base, Fla..

1946 February 5 - .

XS-1 Flight 2 - . Crew: Woolams. Payload: XS-1 # 1 flight 2. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 2. At Pinecastle AAF, Florida..

1946 February 5 - .

XS-1 Flight 3 - . Crew: Woolams. Payload: XS-1 # 1 flight 3. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 3. At Pinecastle AAF, Florida..

1946 February 11 - .

XS-1 Flight 4 - . Crew: Woolams. Payload: XS-1 # 1 flight 4. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 4. Gear retracted, left wing damaged. At Pinecastle AAF, Florida..

1946 February 19 - .

XS-1 Flight 5 - . Crew: Woolams. Payload: XS-1 # 1 flight 5. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 5. Nosewheel retracted on landing runout. Landing-gear door damaged. At Pinecastle AAF, Florida..

1946 February 25 - .

XS-1 Flight 6 - . Crew: Woolams. Payload: XS-1 # 1 flight 6. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 6. Static directional stability investigation. At Pinecastle AAF, Florida..

1946 February 25 - .

XS-1 Flight 7 - . Crew: Woolams. Payload: XS-1 # 1 flight 7. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 7. Longitudinal and directional stability investigation. At Pinecastle AAF, Florida..

1946 February 26 - .

XS-1 Flight 9 - . Crew: Woolams. Payload: XS-1 # 1 flight 9. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 9. Rate of roll investigation. At Pinecastle AAF, Florida..

1946 February 26 - .

XS-1 Flight 8 - . Crew: Woolams. Payload: XS-1 # 1 flight 8. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 8. Dynamic stability check. At Pinecastle AAF, Florida..

1946 March 6 - .

XS-1 Flight 10 - . Crew: Woolams. Payload: XS-1 # 1 flight 10. Nation: USA. Related Persons: Woolams. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 10. Static longitudinal stability investigation. At Pinecastle AAF, Florida..

1946 October 7 - .

X-1 moved to Edwards. - . Nation: USA. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. First of three XS-1 (later X-1) rocket research airplanes moved from Bell Aircraft's Niagara Falls plant to Muroc, Calif..

1946 October 11 - .

XS-1 Flight 11 - . Crew: Goodlin. Payload: XS-1 # 2 flight 1. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 1. Glide flight, pilot familiarization..

1946 October 14 - .

XS-1 Flight 12 - . Crew: Goodlin. Payload: XS-1 # 2 flight 2. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 2. Glide flight..

1946 October 17 - .

XS-1 Flight 13 - . Crew: Goodlin. Payload: XS-1 # 2 flight 3. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 3. Glide flight, small check..

1946 December 2 - .

XS-1 Flight 14 - . Crew: Goodlin. Payload: XS-1 # 2 flight 4. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 4. Glide flight, check of fuel-jettison system..

1946 December 9 - .

XS-1 Flight 15 - . Crew: Goodlin. Payload: XS-1 # 2 flight 5. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 5. First XS-1 powered flight. Mach 0.79 at 10675 m. Minor engine fire. At Edwards AFB, California..

1946 December 20 - .

XS-1 Flight 16 - . Crew: Goodlin. Payload: XS-1 # 2 flight 6. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 6. Familiarization powered flight..

1947 January 8 - .

XS-1 Flight 17 - . Crew: Goodlin. Payload: XS-1 # 2 flight 7. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 7. Buffet boundary investigation. Mach 0.80 at 10675 m..

1947 January 17 - .

XS-1 Flight 18 - . Crew: Goodlin. Payload: XS-1 # 2 flight 8. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 8. Buffet boundary investigation. Full-power climb. Plane reached mach 0.82..

1947 January 22 - .

XS-1 Flight 19 - . Crew: Goodlin. Payload: XS-1 # 2 flight 9. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 9. Buffet boundary investigation. Full-power climb. Telemetry failure..

1947 January 23 - .

XS-1 Flight 20 - . Crew: Goodlin. Payload: XS-1 # 2 flight 10. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 10. Buffet boundary investigation. Full-power climb..

1947 January 30 - .

XS-1 Flight 21 - . Crew: Goodlin. Payload: XS-1 # 2 flight 11. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 11. Accelerated stalls. Partial power due to engine igniters. Mach 0.75..

1947 January 31 - .

XS-1 Flight 22 - . Crew: Goodlin. Payload: XS-1 # 2 flight 12. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 12. Buffet boundary investigation. Mach 0.7..

1947 February 5 - .

XS-1 Flight 23 - . Crew: Goodlin. Payload: XS-1 # 2 flight 13. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 13. Machmeter calibration..

1947 February 7 - .

XS-1 Flight 24 - . Crew: Goodlin. Payload: XS-1 # 2 flight 14. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 14. Buffet boundary investigation..

1947 February 19 - .

XS-1 Flight 25 - . Crew: Goodlin. Payload: XS-1 # 2 flight 15. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 15. Accelerated stalls..

1947 February 21 - .

XS-1 Flight 26 - . Crew: Goodlin. Payload: XS-1 # 2 flight 16. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 16. Flight aborted after drop because of low engine-chamber pressure..

1947 April 10 - .

XS-1 Flight 27 - . Crew: Goodlin. Payload: XS-1 # 1 flight 11. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 11. Glide flight and stall check. At Muroc Dry Lake, California..

1947 April 11 - .

XS-1 Flight 28 - . Crew: Goodlin. Payload: XS-1 # 1 flight 12. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 12. Nosewheel damaged. First powered flight of XS-1 # 1 aircraft. At Muroc Dry Lake, California..

1947 April 29 - .

XS-1 Flight 29 - . Crew: Goodlin. Payload: XS-1 # 1 flight 13. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 13. Handling qualities check. At Muroc Dry Lake, California..

1947 April 30 - .

XS-1 Flight 30 - . Crew: Goodlin. Payload: XS-1 # 1 flight 14. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 14. Handling qualities check. At Muroc Dry Lake, California..

1947 May 5 - .

XS-1 Flight 31 - . Crew: Goodlin. Payload: XS-1 # 1 flight 15. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 15. Handling qualities check. At Muroc Dry Lake, California..

1947 May 15 - .

XS-1 Flight 32 - . Crew: Goodlin. Payload: XS-1 # 1 flight 16. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 16. Buffet-boundary investigation. Aileron-damper malfunction..

1947 May 19 - .

XS-1 Flight 33 - . Crew: Goodlin. Payload: XS-1 # 1 flight 17. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 17. Buffet-boundary investigation. At Muroc Dry Lake, California..

1947 May 21 - .

XS-1 Flight 34 - . Crew: Goodlin. Payload: XS-1 # 1 flight 18. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 18. Buffet-boundary investigation. At Muroc Dry Lake, California..

1947 May 22 - .

XS-1 Flight 35 - . Crew: Johnston, Alvin. Payload: XS-1 # 2 flight 17. Nation: USA. Related Persons: Johnston, Alvin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 17. Pilot familiarization flight. Mach 0.72, 8 g pullout..

1947 May 29 - .

XS-1 Flight 36 - . Crew: Goodlin. Payload: XS-1 # 2 flight 18. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 18. Airspeed calibration flight to mach 0.72. End of Bell contractor program..

1947 June 5 - .

XS-1 Flight 37 - . Crew: Goodlin. Payload: XS-1 # 1 flight 19. Nation: USA. Related Persons: Goodlin. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Bell flight 19. Demonstration flight for Aviation Writers Association. At Muroc Dry Lake, California..

1947 August 6 - .

XS-1 Flight 38 - . Crew: Yeager. Payload: XS-1 # 1 flight 20. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF glide flight 1. Pilot familiarization..

1947 August 7 - .

XS-1 Flight 39 - . Crew: Yeager. Payload: XS-1 # 1 flight 21. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF glide flight 2. .

1947 August 8 - .

XS-1 Flight 40 - . Crew: Yeager. Payload: XS-1 # 1 flight 22. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF glide flight 3. .

1947 August 29 - .

XS-1 Flight 41 - . Crew: Yeager. Payload: XS-1 # 1 flight 23. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF powered flight 1. Mach 0.85..

1947 September 4 - .

XS-1 Flight 42 - . Crew: Yeager. Payload: XS-1 # 1 flight 24. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 2. About mach 0.89. Telemeter failure required repeat of this flight..

1947 September 8 - .

XS-1 Flight 43 - . Crew: Yeager. Payload: XS-1 # 1 flight 25. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 3..

1947 September 10 - .

XS-1 Flight 44 - . Crew: Yeager. Payload: XS-1 # 1 flight 26. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 4. Mach 0.91. Stability and control investigation..

1947 September 12 - .

XS-1 Flight 45 - . Crew: Yeager. Payload: XS-1 # 1 flight 27. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 5. Mach 0.92. Check of elevator and stabilizer effectiveness. Also buffet investigation..

1947 September 25 - .

XS-1 Flight 46 - . Crew: Yeager. Payload: XS-1 # 2 flight 19. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA acceptance flight. Number 4 cylinder burned out..

1947 October 3 - .

XS-1 Flight 47 - . Crew: Yeager. Payload: XS-1 # 1 flight 28. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 6. Check of elevator and stabilizer effectiveness. Also buffet investigation..

1947 October 8 - .

XS-1 Flight 48 - . Crew: Yeager. Payload: XS-1 # 1 flight 29. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 7. Airspeed calibration flight. Plane attained mach 0.925..

1947 October 10 - .

XS-1 Flight 49 - . Crew: Yeager. Payload: XS-1 # 1 flight 30. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 8. Stability and control investigation. Plane attained mach 0.997..

1947 October 14 - .

XS-1 Flight 50 - first supersonic manned flight - . Crew: Yeager. Payload: XS-1 # 1 flight 31. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 9. World's first supersonic flight in level or climbing flight was made by Capt. Charles E. Yeager (USAF) at Muroc, Calif., in a rocket-powered NACA-USAF research plane, Bell XS-1XS-1 # 1 attained mach 1.06 at 13,115 m, approximately 1126 kph..

1947 October 21 - .

XS-1 Flight 51 - . Crew: Hoover. Payload: XS-1 # 2 flight 20. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA glide-familiarization flight for NACA pilot. Stall check. Nosewheel collapsed on landing..

1947 October 27 - .

XS-1 Flight 52 - . Crew: Yeager. Payload: XS-1 # 1 flight 32. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 10. Electric power failure. No rocket ignition..

1947 October 28 - .

XS-1 Flight 53 - . Crew: Yeager. Payload: XS-1 # 1 flight 33. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 11. Telemetry failure..

1947 October 29 - .

XS-1 Flight 54 - . Crew: Yeager. Payload: XS-1 # 1 flight 34. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 12. Telemetry failure..

1947 October 31 - .

XS-1 Flight 55 - . Crew: Yeager. Payload: XS-1 # 1 flight 35. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 13..

1947 November 3 - .

XS-1 Flight 56 - . Crew: Yeager. Payload: XS-1 # 1 flight 36. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 14..

1947 November 4 - .

XS-1 Flight 57 - . Crew: Yeager. Payload: XS-1 # 1 flight 37. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 15..

1947 November 6 - .

XS-1 Flight 58 - . Crew: Yeager. Payload: XS-1 # 1 flight 38. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 16. Mach 1.35 at 14823 m..

1947 December 16 - .

XS-1 Flight 59 - . Crew: Hoover. Payload: XS-1 # 2 flight 21. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA powered flight 1. Familiarization. Mach 0.84. No telemetry record..

1947 December 17 - .

XS-1 Flight 60 - . Crew: Hoover. Payload: XS-1 # 2 flight 22. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 2. Familiarization. Mach 0.8..

1948 January 6 - .

XS-1 Flight 61 - . Crew: Hoover. Payload: XS-1 # 2 flight 23. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 3. Turns and pull-ups to buffet. Mach 0.74..

1948 January 8 - .

XS-1 Flight 62 - . Crew: Hoover. Payload: XS-1 # 2 flight 24. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 4. Turns and pull-ups to buffet. Mach 0.83..

1948 January 9 - .

XS-1 Flight 63 - . Crew: Lilly. Payload: XS-1 # 2 flight 25. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 5. Pilot familiarization..

1948 January 15 - .

XS-1 Flight 64 - . Crew: Lilly. Payload: XS-1 # 2 flight 26. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 6. Turns and pull-ups to buffet. Sideslips. Mach 0.76..

1948 January 16 - .

XS-1 Flight 65 - . Crew: Yeager. Payload: XS-1 # 1 flight 39. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 17. Airspeed calibration. Mach 0.9..

1948 January 21 - .

XS-1 Flight 66 - . Crew: Hoover. Payload: XS-1 # 2 flight 27. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 7. Stabilizer effectiveness investigation. Mach 0.82 at 8845 m..

1948 January 22 - .

XS-1 Flight 67 - . Crew: Yeager. Payload: XS-1 # 1 flight 40. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 18. Pressure distribution survey. Mach 1.2..

1948 January 23 - .

XS-1 Flight 68 - . Crew: Hoover. Payload: XS-1 # 2 flight 28. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 8. Attempted high-speed run aborted at mach 0.83, drop in chamber pressure..

1948 January 27 - .

XS-1 Flight 69 - . Crew: Hoover. Payload: XS-1 # 2 flight 29. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 9. High-speed run to mach 0.925 at 11590 m. Cylinders 2 and 3 failed to fire..

1948 January 30 - .

XS-1 Flight 70 - . Crew: Yeager. Payload: XS-1 # 1 flight 41. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 19. Pressure distribution survey. Mach 1.1..

1948 February 24 - .

XS-1 Flight 71 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 42. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1.
AF flight 20. Engine fire after launch forced jettisoning of propellants, completed as a glide flight. However Fitz-Gerald reached 12.1 km and reached Mach 1.10 before the engine was shut off, in the process becoming the second person to break the sound barrier.

1948 March 4 - .

XS-1 Flight 72 - . Crew: Hoover. Payload: XS-1 # 2 flight 30. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 10. High-speed run to mach 0.943 at 12200 m..

1948 March 10 - .

XS-1 Flight 73 - . Crew: Hoover. Payload: XS-1 # 2 flight 31. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 11. First NACA supersonic flight. First civilian supersonic flight. Mach 1.065. Nosewheel failed to extend for landing. Minor damage..

1948 March 11 - .

XS-1 Flight 74 - . Crew: Yeager. Payload: XS-1 # 1 flight 43. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 21. Attained mach 1.25 in dive..

1948 March 22 - .

XS-1 Flight 75 - . Crew: Hoover. Payload: XS-1 # 2 flight 32. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 12. Stability and loads investigation. Mach 1.12..

1948 March 26 - .

XS-1 Flight 76 - . Crew: Yeager. Payload: XS-1 # 1 flight 44. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 22. Attained mach 1.45 at 12239 m during dive. Fastest flight ever made in original XS-1 aircraft..

1948 March 30 - .

XS-1 Flight 77 - . Crew: Hoover. Payload: XS-1 # 2 flight 33. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 13. Stability and loads investigation. Mach 0.90..

1948 March 31 - .

XS-1 Flight 78 - . Crew: Lilly. Payload: XS-1 # 2 flight 34. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 14. Stability and loads investigation. Plane attained mach 1.1..

1948 March 31 - .

XS-1 Flight 79 - . Crew: Yeager. Payload: XS-1 # 1 flight 45. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 23. Engine shutdown after launch. Propellants jettisoned, completed as glide flight..

1948 April 5 - .

XS-1 Flight 80 - . Crew: Lilly. Payload: XS-1 # 2 flight 35. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 15. Engine failed to ignite. Propellants jettisoned, completed as glide flight..

1948 April 6 - .

XS-1 Flight 81 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 46. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 24. Pilot-check flight. Mach 1.1, during 4-cylinder run at 12505 m..

1948 April 7 - .

XS-1 Flight 82 - . Crew: Lundquist. Payload: XS-1 # 1 flight 47. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 25. Glide flight only..

1948 April 8 - .

XS-1 Flight 83 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 48. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 26. Familiarization flight..

1948 April 9 - .

XS-1 Flight 85 - . Crew: Lundquist. Payload: XS-1 # 1 flight 49. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 27. Powered pilot-check flight..

1948 April 9 - .

XS-1 Flight 84 - . Crew: Lilly. Payload: XS-1 # 2 flight 36. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 16. Stability and loads investigation. Mach 0.89..

1948 April 16 - .

XS-1 Flight 87 - . Crew: Lundquist. Payload: XS-1 # 1 flight 50. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 28. Pressure distribution survey. Only cylinders 2 and 4 ignited..

1948 April 16 - .

XS-1 Flight 86 - . Crew: Lilly. Payload: XS-1 # 2 flight 37. Nation: USA. Related Persons: Lilly. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 17. Stability and loads investigation. Plane's nosewheel collapsed on landing. Moderate damage..

1948 April 26 - .

XS-1 Flight 88 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 51. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 29. Aborted because of inconsistent rocket operation. Reached mach 0.9..

1948 April 29 - .

XS-1 Flight 89 - . Crew: Lundquist. Payload: XS-1 # 1 flight 52. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 30. Pressure distribution survey. Attained mach 1.18..

1948 May 4 - .

XS-1 Flight 90 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 53. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 31. Pressure distribution survey. Mach 1.15..

1948 May 21 - .

XS-1 Flight 91 - . Crew: Lundquist. Payload: XS-1 # 1 flight 54. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 32. Stability and control and buffeting investigation. Mach 0.92..

1948 May 25 - .

XS-1 Flight 92 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 55. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 33. Buffet investigation, wing and tail loads. Mach 1.08..

1948 May 26 - .

XS-1 Flight 93 - . Crew: Yeager. Payload: XS-1 # 1 flight 56. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 34. Buffet investigation, wing and tail loads. Mach 1.05..

1948 June 3 - .

XS-1 Flight 94 - . Crew: Lundquist. Payload: XS-1 # 1 flight 57. Nation: USA. Related Persons: Lundquist. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 35. Left main gear door opened in flight. Nosewheel collapsed on landing..

1948 November 1 - .

XS-1 Flight 95 - . Crew: Hoover. Payload: XS-1 # 2 flight 38. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 18. Stability and control. Mach 0.9. Number 4 cylinder failed to fire..

1948 November 15 - .

XS-1 Flight 96 - . Crew: Hoover. Payload: XS-1 # 2 flight 39. Nation: USA. Related Persons: Hoover. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 19. Stability and control. Also pressure-distribution survey. Mach 0.98..

1948 November 23 - .

XS-1 Flight 97 - . Crew: Champine. Payload: XS-1 # 2 flight 40. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 20. Pilot familiarization. Check on handling qualities and pressure distribution..

1948 November 29 - .

XS-1 Flight 98 - . Crew: Champine. Payload: XS-1 # 2 flight 41. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 21. Check on handling qualities and pressure distribution. Mach 0.88..

1948 November 30 - .

XS-1 Flight 99 - . Crew: Champine. Payload: XS-1 # 2 flight 42. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 22. Check on handling qualities and pressure distribution. .

1948 December 1 - .

XS-1 Flight 100 - . Crew: Yeager. Payload: XS-1 # 1 flight 58. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 36. Handling qualities and wing and tail loads at mach 1..

1948 December 2 - .

XS-1 Flight 101 - . Crew: Champine. Payload: XS-1 # 2 flight 43. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 23. Check on handling qualities and pressure distribution. Plane exceeded mach 1 briefly..

1948 December 13 - .

XS-1 Flight 102 - . Crew: Yeager. Payload: XS-1 # 1 flight 59. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 37. Handling qualities and wing and tail loads at mach 1..

1948 December 23 - .

XS-1 Flight 103 - . Crew: Yeager. Payload: XS-1 # 1 flight 60. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 38. Wing and tail loads during supersonic flight at high altitudes. Mach 1.09..

1949 January 5 - .

XS-1 Flight 104 - . Crew: Yeager. Payload: XS-1 # 1 flight 61. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 39. Rocket takeoff from the ground..

1949 March 11 - .

XS-1 Flight 105 - . Crew: Ridley. Payload: XS-1 # 1 flight 62. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 40. Familiarization flight. Mach 1.23 at 10675 m. Small engine fire due to loose igniter..

1949 March 16 - .

XS-1 Flight 106 - . Crew: Boyd. Payload: XS-1 # 1 flight 63. Nation: USA. Related Persons: Boyd. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 41. Familiarization flight. Inflight engine fire and shutdown..

1949 March 21 - .

XS-1 Flight 107 - . Crew: Everest. Payload: XS-1 # 1 flight 64. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 42. Familiarization flight. Mach 1.22 at 12200 m..

1949 March 25 - .

XS-1 Flight 108 - . Crew: Everest. Payload: XS-1 # 1 flight 65. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 43. Check of pressure suit for altitude operation. Mach 1.24 at 14640 m. Rocket fire and automatic engine shutdown..

1949 April 14 - .

XS-1 Flight 109 - . Crew: Ridley. Payload: XS-1 # 1 flight 66. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 44. Accelerated stall check at transonic speeds. Mach 1.1 at 12200 m..

1949 April 19 - .

XS-1 Flight 110 - . Crew: Everest. Payload: XS-1 # 1 flight 67. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 45. Altitude attempt. Only 2 cylinders fired..

1949 May 2 - .

XS-1 Flight 111 - . Crew: Yeager. Payload: XS-1 # 1 flight 68. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 46. Partial engine malfunction, faulty engine ignition plug..

1949 May 5 - .

XS-1 Flight 112 - . Crew: Everest. Payload: XS-1 # 1 flight 69. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight. Engine chamber exploded, jamming rudder. Everest landed safely..

1949 May 6 - .

XS-1 Flight 113 - . Crew: Champine. Payload: XS-1 # 2 flight 44. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 24. Check on airplane instrumentation. Mach 0.88 at 12200 m..

1949 May 13 - .

XS-1 Flight 114 - . Crew: Champine. Payload: XS-1 # 2 flight 45. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 25. Spanwise pressure distribution, stability and control. Mach 0.91..

1949 May 27 - .

XS-1 Flight 115 - . Crew: Champine. Payload: XS-1 # 2 flight 46. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 26. Spanwise pressure distribution, stability and control. Mach 0.91. Stabilizer found more effective than the elevator during pull-ups at mach 0.91..

1949 June 16 - .

XS-1 Flight 116 - . Crew: Champine. Payload: XS-1 # 2 flight 47. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 27. Spanwise pressure distribution, stability and control. Rolls and pull-ups around mach 0.91..

1949 June 23 - .

XS-1 Flight 117 - . Crew: Champine. Payload: XS-1 # 2 flight 48. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 28. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness..

1949 July 11 - .

XS-1 Flight 118 - . Crew: Champine. Payload: XS-1 # 2 flight 49. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 29. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness. Mach 0.91. Number 2 cylinder failed to fire..

1949 July 19 - .

XS-1 Flight 119 - . Crew: Champine. Payload: XS-1 # 2 flight 50. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 30. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness. Mach 0.91. Number 2 cylinder failed to fire..

1949 July 25 - .

XS-1 Flight 120 - . Crew: Everest. Payload: XS-1 # 1 flight 70. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 48. Altitude attempt. Attained 20388 m altitude..

1949 July 27 - .

XS-1 Flight 121 - . Crew: Champine. Payload: XS-1 # 2 flight 51. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 31. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness..

1949 August 4 - .

XS-1 Flight 122 - . Crew: Champine. Payload: XS-1 # 2 flight 52. Nation: USA. Related Persons: Champine. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 32. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness..

1949 August 8 - .

XS-1 Flight 123 - . Crew: Everest. Payload: XS-1 # 1 flight 71. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 49. Altitude attempt. Attained 21930 m altitude..

1949 August 25 - .

XS-1 Flight 124 - . Crew: Everest. Payload: XS-1 # 1 flight 72. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 50. First use of partial pressure suit to save life of pilot during flight at high altitude. X-1 # 1 lost cockpit pressurization about 21000 m. Everest made safe emergency descent..

1949 September 23 - .

XS-1 Flight 125 - . Crew: Griffith. Payload: XS-1 # 2 flight 53. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 33. Pilot familiarization. Mach 0.9..

1949 October 6 - .

XS-1 Flight 126 - . Crew: Fleming. Payload: XS-1 # 1 flight 73. Nation: USA. Related Persons: Fleming. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 51. Pilot familiarization..

1949 October 26 - .

XS-1 Flight 127 - . Crew: Johnson. Payload: XS-1 # 1 flight 74. Nation: USA. Related Persons: Johnson. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 52. Pilot familiarization..

1949 November 29 - .

XS-1 Flight 128 - . Crew: Everest. Payload: XS-1 # 1 flight 75. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 53. High-altitude wing-tail loads investigation..

1949 November 30 - .

XS-1 Flight 129 - . Crew: Griffith. Payload: XS-1 # 2 flight 54. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 33. Mach 0.91..

1949 December 2 - .

XS-1 Flight 130 - . Crew: Everest. Payload: XS-1 # 1 flight 76. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 54. High-altitude wing-tail loads investigation..

1950 February 21 - .

XS-1 Flight 131 - . Crew: Everest. Payload: XS-1 # 1 flight 77. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 55. Wing-and-tail-loads investigation..

1950 April 26 - .

XS-1 Flight 132 - . Crew: Yeager. Payload: XS-1 # 1 flight 78. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 56. Lateral stability and control investigation..

1950 May 5 - .

XS-1 Flight 133 - . Crew: Ridley. Payload: XS-1 # 1 flight 79. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 57. Buffeting, wing and tail loads..

1950 May 8 - .

XS-1 Flight 134 - . Crew: Ridley. Payload: XS-1 # 1 flight 80. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 58. Buffeting, wing and tail loads..

1950 May 12 - .

XS-1 Flight 135 - . Crew: Griffith. Payload: XS-1 # 2 flight 55. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 34. Spanwise pressure distribution, stability and control. Pull-ups and rolls..

1950 May 12 - .

XS-1 Flight 136 - . Crew: Yeager. Payload: XS-1 # 1 flight 81. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. AF flight 59. Last flight of XS-1 No. 1 rocket research airplane, for RKO motion picture "Test Pilot," which was turned over to the National Air Museum at the Smithsonian on August 28th..

1950 May 17 - .

XS-1 Flight 137 - . Crew: Griffith. Payload: XS-1 # 2 flight 56. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 35. Spanwise pressure distribution, stability and control. Pull-ups and rolls. Mach 1.13 at 12810 m..

1950 May 26 - .

XS-1 Flight 138 - . Crew: Griffith. Payload: XS-1 # 2 flight 57. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 36. Spanwise pressure distribution, stability and control. Pull-ups and rolls. Mach 1.20. Nosewheel collapsed on landing..

1950 August 9 - .

XS-1 Flight 139 - . Crew: Griffith. Payload: XS-1 # 2 flight 58. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 38. For pressure distribution and stability and control data. Check of stabilizer effectiveness. Mach 0.98..

1950 August 11 - .

XS-1 Flight 140 - . Crew: Griffith. Payload: XS-1 # 2 flight 59. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 39. For pressure distribution and stability and control data. Check of stabilizer effectiveness. .

1950 September 21 - .

XS-1 Flight 141 - . Crew: Griffith. Payload: XS-1 # 2 flight 60. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 40. For pressure distribution and stability and control data. Check of stabilizer effectiveness. Also drag investigation. Pull-ups. Mach 0.90..

1950 October 4 - .

XS-1 Flight 142 - . Crew: Griffith. Payload: XS-1 # 2 flight 61. Nation: USA. Related Persons: Griffith. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 41. For pressure distribution and stability and control data. Check of stabilizer effectiveness. Also drag investigation. Pull-ups..

1951 April 6 - .

XS-1 Flight 143 - . Crew: Yeager. Payload: XS-1 # 2 flight 62. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 42. Flight for RKO film Jet Pilot. Slight engine fire but no damage..

1951 April 20 - .

XS-1 Flight 144 - . Crew: Crossfield. Payload: XS-1 # 2 flight 63. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 43. Pilot familiarization. Reached mach 1.07..

1951 April 27 - .

XS-1 Flight 145 - . Crew: Crossfield. Payload: XS-1 # 2 flight 64. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 44. Plane and instrument check..

1951 May 15 - .

XS-1 Flight 146 - . Crew: Crossfield. Payload: XS-1 # 2 flight 65. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 45. Wing loads and aileron effectiveness. Aileron rolls at mach 0.90..

1951 July 12 - .

XS-1 Flight 147 - . Crew: Crossfield. Payload: XS-1 # 2 flight 66. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 46. Wing loads and aileron effectiveness. Aileron rolls at mach 1.07..

1951 July 20 - .

XS-1 Flight 148 - . Crew: Crossfield. Payload: XS-1 # 2 flight 67. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 47. Wing loads and aileron effectiveness. Abrupt rudder fixed aileron rolls left and right, from mach 0.70 to mach 0.88..

1951 July 24 - .

X-1D Flight 1 - . Crew: Ziegler. Payload: X-1D flight 1. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1D. Bell flight 1. Glide flight for familiarization. Nose landing gear broken on landing. Following repairs, plane turned over to the Air Force..

1951 July 31 - .

XS-1 Flight 149 - . Crew: Crossfield. Payload: XS-1 # 2 flight 68. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 48. Wing loads and aileron effectiveness..

1951 August 3 - .

XS-1 Flight 150 - . Crew: Crossfield. Payload: XS-1 # 2 flight 69. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 49. Wing loads and aileron effectiveness..

1951 August 8 - .

XS-1 Flight 151 - . Crew: Crossfield. Payload: XS-1 # 2 flight 70. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 50. Wing loads and aileron effectiveness. Elevator and stabilizer pull-ups..

1951 August 10 - .

XS-1 Flight 152 - . Crew: Crossfield. Payload: XS-1 # 2 flight 71. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 51. Wing loads and aileron effectiveness. Elevator and stabilizer pull-ups, clean stalls..

1951 August 22 - .

X-1D Flight 2 - . Crew: Everest. Payload: X-1D flight 2. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1D. AF flight 1. Launch aborted, but X-1D suffered low-order explosion during pressurization for fuel jettison. Plane jettisoned from B-50. X-1D exploded on impact with desert. Everest managed to get into B-50 bomb bay before drop..

1951 August 27 - .

XS-1 Flight 153 - . Crew: Walker, Joseph. Payload: XS-1 # 2 flight 72. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 52. Pilot familiarization. Reached mach 1.16 at 13420 m during four-cylinder run..

1951 September 5 - .

XS-1 Flight 154 - . Crew: Crossfield. Payload: XS-1 # 2 flight 73. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 53. Fuselage pressure distribution survey. Number 1 cylinder failed to fire. Stabilizer pull-ups at mach 1.07..

1951 October 23 - .

XS-1 Flight 155 - . Crew: Walker, Joseph. Payload: XS-1 # 2 flight 74. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. NACA flight 54. Engine cut out after two ignition attempts; propellants jettisoned and flight completed as glide flight. Plane subsequently grounded because of possibility of fatigue failure of nitrogen spheres..

1951 November 9 - . Launch Site: Edwards. Launch Complex: Edwards.

XS-1 No. 3 destroyed in ground explosion. - . Crew: Cannon. Payload: XS-1 # 3 flight 1. Nation: USA. Related Persons: Cannon. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Planned captive flight with B-50 for propellant jettison test. XS-1 (No. 3) rocket research airplane and its B-29 "mother" airplane were destroyed on the ground by postflight explosion and fire. Pilot Cannon was injured..

1953 February 14 - .

X-1A Flight 2 - . Crew: Ziegler. Payload: X-1A flight 2. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 2. Planned as powered flight, but completed as glide flight following propellant-system difficulties..

1953 February 14 - .

X-1A Flight 1 - . Crew: Ziegler. Payload: X-1A flight 1. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 1. Pilot familiarization. Fuel jettison test. Glide flight only..

1953 February 21 - .

X-1A Flight 3 - . Crew: Ziegler. Payload: X-1A flight 3. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 3. First powered flight. False fire warning..

1953 March 26 - .

X-1A Flight 4 - . Crew: Ziegler. Payload: X-1A flight 4. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 4. Plane demonstrated successful 4-cylinder engine operation..

1953 April 10 - .

X-1A Flight 5 - . Crew: Ziegler. Payload: X-1A flight 5. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 5. Pilot noted low-frequency elevator buzz at mach 0.93, did not proceed above this speed, pending buzz investigation..

1953 April 25 - .

X-1A Flight 6 - . Crew: Ziegler. Payload: X-1A flight 6. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Bell flight 6. Buzz again noted at mach 0.93. Turbopump overspeeding caused pilot to terminate power and jettison remaining fuel..

1953 May 12 - .

X-2 explodes in air - . Crew: Ziegler. Nation: USA. Related Persons: Ziegler. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 .
During a Bell captive-carry flight test over Lake Ontario, X-2 number 46-675 suddenly exploded, killing Bell test pilot Jean Ziegler and observer Frank Wolko. The EB-50A mothership managed to land, although damaged. Only after several other mysterious X-plane losses was the cause found to be a rocket engine gasket made of Ulmer leather, which decomposed and became explosively unstable after sustained exposure to liquid oxygen.

1953 November 21 - .

X-1A Flight 7 - . Crew: Yeager. Payload: X-1A flight 7. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 1. Reached mach 1.15. Familiarization purposes..

1953 December 2 - .

X-1A Flight 8 - . Crew: Yeager. Payload: X-1A flight 8. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 2. Mach 1.5..

1953 December 8 - .

X-1A Flight 9 - . Crew: Yeager. Payload: X-1A flight 9. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 3. First high-mach flight attempt by X-1A. Mach 1.9 attained at 18300 m during slight climb..

1953 December 12 - .

X-1A Flight 10 - . Crew: Yeager. Payload: X-1A flight 10. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 4. Plane attained mach 2.44, but met violent instability above mach 2.3. Tumbled 15250 m, wound up in subsonic inverted spin. Yeager recovered to upright spin, then normal flight at 7625 m..

1954 March 21 - .

X-1A Flight 11 - . Crew: Murray. Payload: X-1A flight 11. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 5. Date estimated..

1954 April 4 - .

X-1A Flight 12 - . Crew: Murray. Payload: X-1A flight 12. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 6. Date estimated..

1954 April 11 - .

X-1A Flight 13 - . Crew: Murray. Payload: X-1A flight 13. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 7. Date estimated..

1954 April 25 - .

X-1A Flight 14 - . Crew: Murray. Payload: X-1A flight 14. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 8. Date estimated..

1954 May 14 - .

X-1A Flight 15 - . Crew: Murray. Payload: X-1A flight 15. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 9. Date estimated..

1954 May 28 - .

X-1A Flight 16 - . Crew: Murray. Payload: X-1A flight 16. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 10. X-1A attained 26564 m, un-official world altitude record for manned aircraft..

1954 June 4 - .

X-1A Flight 17 - . Crew: Murray. Payload: X-1A flight 17. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 11. X-1A reached 27374 m. Encountered same instability Yeager had, but at mach 1.97. Murray recovered after tumbling 6100 m down to 20130 m..

1954 June 18 - .

X-1A Flight 18 - . Crew: Murray. Payload: X-1A flight 18. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 12. Date estimated..

1954 July 2 - .

X-1A Flight 19 - . Crew: Murray. Payload: X-1A flight 19. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 13. Date estimated..

1954 July 16 - .

X-1A Flight 20 - . Crew: Murray. Payload: X-1A flight 20. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 14. Date estimated..

1954 July 30 - .

X-1A Flight 21 - . Crew: Murray. Payload: X-1A flight 21. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 15. Date estimated..

1954 August 5 - .

X-2 Flight 1 - . Crew: Everest. Payload: X-2 # 1 flight 1. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . First glide flight of the second X-2, number 46-674, after delivery to Edwards AFB a month earlier. Damaged on landing..

1954 August 8 - .

X-1A Flight 22 - . Crew: Murray. Payload: X-1A flight 22. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 16. Date estimated..

1954 August 19 - .

X-1A Flight 23 - . Crew: Murray. Payload: X-1A flight 23. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 17. Date estimated..

1954 August 26 - .

X-1A Flight 24 - . Crew: Murray. Payload: X-1A flight 24. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. AF flight 18. Murray attained 27584 m. Air Force then turned X-1A over to NACA..

1954 August 29 - .

X-1B Flight 1 - . Crew: McKay. Payload: X-1B flight 12. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 2. Cabin-pressure regulator malfunction causes inner canopy to crack; only low-speed, low-altitude maneuvers made..

1954 September 24 - .

X-1B Flight 2 - . Crew: Ridley. Payload: X-1B flight 1. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 1. Glide flight, because of turbopump over-speeding..

1954 October 6 - .

X-1B Flight 3 - . Crew: Ridley. Payload: X-1B flight 2. Nation: USA. Related Persons: Ridley. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 2. Glide flight, aborted power flight because of evidence of high lox-tank pressure..

1954 October 8 - .

X-1B Flight 4 - . Crew: Murray. Payload: X-1B flight 3. Nation: USA. Related Persons: Murray. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 3. First powered flight..

1954 October 13 - .

X-1B Flight 5 - . Crew: Stephens. Payload: X-1B flight 4. Nation: USA. Related Persons: Stephens. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 4..

1954 October 19 - .

X-1B Flight 6 - . Crew: Childs. Payload: X-1B flight 5. Nation: USA. Related Persons: Childs. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 5..

1954 October 26 - .

X-1B Flight 7 - . Crew: Hanes. Payload: X-1B flight 6. Nation: USA. Related Persons: Hanes. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 6..

1954 November 4 - .

X-1B Flight 8 - . Crew: Harer. Payload: X-1B flight 7. Nation: USA. Related Persons: Harer. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 7..

1954 November 26 - .

X-1B Flight 9 - . Crew: Holtoner. Payload: X-1B flight 8. Nation: USA. Related Persons: Holtoner. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 8..

1954 November 30 - .

X-1B Flight 10 - . Crew: Everest. Payload: X-1B flight 9. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 9..

1954 December 2 - .

X-1B Flight 11 - . Crew: Everest. Payload: X-1B flight 10. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. AF flight 10. Mach 2.3 at 19825 m..

1955 March 8 - .

X-2 Flight 2 - . Crew: Everest. Payload: X-2 # 1 flight 2. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Second glide flight. Propellant system check. Minor damage on landing..

1955 April 6 - .

X-2 Flight 3 - . Crew: Everest. Payload: X-2 # 1 flight 3. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Third glide flight. Damaged on landing. Following flight, plane returned to Bell plant for extensive modifications to landing gear system to prevent further landing accidents and for installation of its rocket engine..

1955 July 20 - .

X-1A Flight 25 - . Crew: Walker, Joseph. Payload: X-1A flight 25. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. NACA flight 1. Familiarization. Walker attained mach 1.45 at 13725 m. Noted severe aileron buzz at mach 0.90 to 0.92..

1955 August 8 - .

X-1A Flight 26 - . Crew: Walker, Joseph. Payload: X-1A flight 26. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1A. Planned at NACA flight 2. Shortly before launch from B-29, X-1A suffered low-order explosion, later traced to detonation of Ulmer leather gaskets. Walker exited into B-29 bomb bay..

1955 October 25 - .

X-2 Flight 4 - . Crew: Everest. Payload: X-2 # 1 flight 4. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Aborted powered flight attempt; became 4th glide flight..

1955 November 18 - .

X-2 Flight 5 - . Crew: Everest. Payload: X-2 # 1 flight 5. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . First powered flight. Mach 0.992 at 10,675 m. Slight fire damage from engine bay fire..

1955 December 3 - .

X-1E Flight 1 - . Payload: X-1E flight 1. Nation: USA. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. Captive flight..

1955 December 12 - .

X-1E Flight 2 - . Crew: Walker, Joseph. Payload: X-1E flight 2. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 1. Glide flight for pilot check-out and low speed evaluation..

1955 December 15 - .

X-1E Flight 3 - . Crew: Walker, Joseph. Payload: X-1E flight 3. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 2. First powered flight. Engine ran at excessive pressure, 4 overspeeds of turbopump and 2 automatic shutdowns. Power terminated by pilot..

1956 March 24 - .

X-2 Flight 6 - . Crew: Everest. Payload: X-2 # 1 flight 6. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Second powered flight, mach 0.91..

1956 April 3 - .

X-1E Flight 4 - . Crew: Walker, Joseph. Payload: X-1E flight 4. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 3. Mach 0.85 at 9150 m. Damping characteristics good; number 1 cylinder failed to fire..

1956 April 25 - .

X-2 Flight 7 - . Crew: Everest. Payload: X-2 # 1 flight 7. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . 3d powered flight, mach 1.4 at 15250 m..

1956 April 30 - .

X-1E Flight 5 - . Crew: Walker, Joseph. Payload: X-1E flight 5. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 4. Turbopump did not start; no engine operation..

1956 May 1 - .

X-2 Flight 8 - . Crew: Everest. Payload: X-2 # 1 flight 8. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Fourth powered flight, mach 1.683 at 16,378 m..

1956 May 11 - .

X-1E Flight 6 - . Crew: Walker, Joseph. Payload: X-1E flight 6. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 5. Wind-up turns to Clmas from mach 0.69 to 0.84; also control pulses..

1956 May 11 - .

X-2 Flight 9 - . Crew: Everest. Payload: X-2 # 1 flight 9. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Fifth powered flight, mach 1.8 at 18,300 m..

1956 May 22 - .

X-2 Flight 10 - . Crew: Everest. Payload: X-2 # 1 flight 10. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Sixth powered flight, mach 2.53 at 17.803 m..

1956 May 25 - .

X-2 Flight 11 - . Crew: Kincheloe. Payload: X-2 # 1 flight 11. Nation: USA. Related Persons: Kincheloe. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Seventh powered flight; pilot checkout, mach 1+..

1956 June 7 - .

X-1E Flight 7 - . Crew: Walker, Joseph. Payload: X-1E flight 7. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 6. Mach 1.55 at 13725 m. Longitudinal and lateral trim changes in transonic region found annoying to pilot..

1956 June 18 - .

X-1E Flight 8 - . Crew: Walker, Joseph. Payload: X-1E flight 8. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 7. Mach 1.74 at 18300 m. Damaged on landing..

1956 July 12 - .

X-2 Flight 12 - . Crew: Everest. Payload: X-2 # 1 flight 12. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Eighth powered flight, premature engine shutdown..

1956 July 23 - .

X-2 Flight 13 - . Crew: Everest. Payload: X-2 # 1 flight 13. Nation: USA. Related Persons: Everest. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . Ninth powered flight, Lt. Col. Frank K. Everest (USAF) flew the Bell X-2 rocket-powered research plane at a record speed of Mach 2.87, ust over 1,900 mph, at 20,802 m..

1956 July 26 - .

X-1E Flight 9 - . Crew: Walker, Joseph. Payload: X-1E flight 9. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 8. Subsonic because cylinders 3 and 4 world not fire..

1956 August 3 - .

X-2 Flight 14 - . Crew: Kincheloe. Payload: X-2 # 1 flight 14. Nation: USA. Related Persons: Kincheloe. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . 10th powered flight, mach 2.5+, 26764 m..

1956 August 8 - .

X-2 Flight 15 - . Crew: Kincheloe. Payload: X-2 # 1 flight 15. Nation: USA. Related Persons: Kincheloe. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . 11th powered flight, premature engine shutdown..

1956 August 14 - .

X-1B Flight 12 - . Crew: McKay. Payload: X-1B flight 11. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 1. Pilot check; nose landing gear failed on landing, minor damage..

1956 August 31 - .

X-1E Flight 10 - . Crew: Walker, Joseph. Payload: X-1E flight 10. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 9. Mach 2.0 at 18300 m. Sideslips, pulses, rolls..

1956 September 7 - .

X-1B Flight 13 - . Crew: McKay. Payload: X-1B flight 13. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 3. Speed run to 17080 m and mach 1.8. Limited heating data gathered..

1956 September 7 - .

X-2 Flight 16 - . Crew: Kincheloe. Payload: X-2 # 1 flight 16. Nation: USA. Related Persons: Kincheloe. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 . 12th powered flight. Capt. Iven C. Kincheloe (USAF) set new unofficial altitude record for manned flight at Edwards AFB, Calif., piloting a Bell X-2 rocket-powered aircraft to a height of 38,491 m, top speed Mach 1.7..

1956 September 14 - .

X-1E Flight 11 - . Crew: Walker, Joseph. Payload: X-1E flight 11. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 10. Mach 2.1 at 18910 m. Stabilizer, rudder, and aileron pulses..

1956 September 18 - .

X-1B Flight 14 - . Crew: McKay. Payload: X-1B flight 14. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 4. Glide flight, due to erratic engine start..

1956 September 20 - .

X-1E Flight 12 - . Crew: Walker, Joseph. Payload: X-1E flight 12. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 11. Brief engine power only; flight aborted, unspecified engine malfunction..

1956 September 27 - .

X-2 Flight 17 - . Crew: Apt, Milburn. Payload: X-2 # 1 flight 17. Nation: USA. Related Persons: Apt, Milburn. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2 .
After having been launched from a B-50 bomber over the Mojave Desert in California, Capt. Milburn G. Apt (USAF), flying an X-2 rocket-powered plane on its 13th powered flight, set a record speed of 3,377 kph, or Mach 3.196 at 19,977 m. Subsequent loss of control from inertial coupling led to the destruction of the aircraft and the death of the pilot.

1956 September 27 - .

X-2 reaches Mach 3. - . Nation: USA. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-2.
After having been launched from a B-50 bomber over the Mojave Desert in California, Capt. Milburn G. Apt (USAF), flying an X-2 rocket-powered plane on its 13th powered flight, set a record speed of 2,094 mph, or Mach 3.196. In the course of the flight the aircraft crashed and the pilot was killed.

1956 September 28 - .

X-1B Flight 15 - . Crew: McKay. Payload: X-1B flight 15. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 5. Three-chamber engine run to 18300 m to obtain heating data..

1956 October 3 - .

X-1E Flight 13 - . Crew: Walker, Joseph. Payload: X-1E flight 13. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 12. Only 60-sec rocket operation; intermittent pump operation. Flight aborted, turbopump and engine replaced..

1956 November 20 - .

X-1E Flight 14 - . Crew: Walker, Joseph. Payload: X-1E flight 14. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 13. No engine operation, ignition failure due to lack of manifold pressure..

1957 January 3 - .

X-1B Flight 16 - . Crew: McKay. Payload: X-1B flight 16. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 6. Mach 1.94 aerodynamic heating investigation (end of heating program)..

1957 April 25 - .

X-1E Flight 15 - . Crew: Walker, Joseph. Payload: X-1E flight 15. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 14. Mach 1.71 at 20435 m. Aileron and rudder pulses..

1957 May 15 - .

X-1E Flight 16 - . Crew: Walker, Joseph. Payload: X-1E flight 16. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 15. Mach 2.0 at 22,265 m. Aileron pulses and rolls, sideslips, and wind-up turns. Plane severely damaged upon landing..

1957 May 22 - .

X-1B Flight 17 - . Crew: McKay. Payload: X-1B flight 17. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 7. Control pulses at mach 1.45 at 18300 m. Flight for instrumentation check..

1957 June 7 - .

X-1B Flight 18 - . Crew: McKay. Payload: X-1B flight 18. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 8. Supersonic maneuvers to mach 1.5 at 18300 m to determine the dynamic and static stability and control characteristics..

1957 June 24 - .

X-1B Flight 19 - . Crew: McKay. Payload: X-1B flight 19. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 9. Supersonic maneuvers to mach 1.5 at 18300 m to determine the dynamic and static stability and control characteristics..

1957 July 11 - .

X-1B Flight 20 - . Crew: McKay. Payload: X-1B flight 20. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 10. Aborted after launch, indication of open landing-gear door. Propellants jettisoned, completed as a glide flight..

1957 July 19 - .

X-1B Flight 21 - . Crew: McKay. Payload: X-1B flight 21. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 11. Mach 1.65 at 18,300 m. Control pulses, sideslips, and 2 g wind-up turn..

1957 July 29 - .

X-1B Flight 22 - . Crew: McKay. Payload: X-1B flight 22. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 12. Enlarged wing tips installed to simulate wing tips to be used with reaction controls. Mach 1.55 at 18,300 m..

1957 August 8 - .

X-1B Flight 23 - . Crew: McKay. Payload: X-1B flight 23. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 13. Stability and control investigation. Mach 1.5 at 18300 m, accelerated maneuvers, control pulses, and pull-ups..

1957 August 15 - .

X-1B Flight 24 - . Crew: Armstrong. Payload: X-1B flight 24. Nation: USA. Related Persons: Armstrong. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 14. Pilot check. Nose landing gear failed on landing, minor damage..

1957 September 19 - .

X-1E Flight 17 - . Crew: Walker, Joseph. Payload: X-1E flight 17. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 16. Planned mach number not attained, loss of power during pushover from climb..

1957 October 8 - .

X-1E Flight 18 - . Crew: Walker, Joseph. Payload: X-1E flight 18. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 17. Mach 2.24..

1957 November 27 - .

X-1B Flight 25 - . Crew: Armstrong. Payload: X-1B flight 25. Nation: USA. Related Persons: Armstrong. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 15. First reaction-control flight..

1958 January 16 - .

X-1B Flight 26 - . Crew: Armstrong. Payload: X-1B flight 26. Nation: USA. Related Persons: Armstrong. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 16. Low-altitude, low-mach reaction-control investigation..

1958 January 23 - .

X-1B Flight 27 - . Crew: Armstrong. Payload: X-1B flight 27. Nation: USA. Related Persons: Armstrong. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1B. NACA flight 17. Reaction-control investigation. Mach 1.5 at 16775 m. Last NACA flight..

1958 May 14 - .

X-1E Flight 19 - . Crew: Walker, Joseph. Payload: X-1E flight 19. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 18. First flight with ventral fins; longitudinal and lateral stability and control maneuvers. Engine airstart made at 21,350 m..

1958 June 10 - .

X-1E Flight 20 - . Crew: Walker, Joseph. Payload: X-1E flight 20. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 19. Flight aborted after only 1 cylinder of engine fired. Plane damaged on landing..

1958 September 10 - .

X-1E Flight 21 - . Crew: Walker, Joseph. Payload: X-1E flight 21. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 20. Stability and control investigation with ventral fins..

1958 September 17 - .

X-1E Flight 22 - . Crew: Walker, Joseph. Payload: X-1E flight 22. Nation: USA. Related Persons: Walker, Joseph. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 21. Stability and control with ventral fins and a new stabilizer bell crank permitting greater stabilizer travel..

1958 September 19 - .

X-1E Flight 23 - . Crew: McKay. Payload: X-1E flight 23. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 22. Checkout flight for John McKay..

1958 September 30 - .

X-1E Flight 24 - . Crew: McKay. Payload: X-1E flight 24. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 23. Check of low-speed stability and control..

1958 October 16 - .

X-1E Flight 25 - . Crew: McKay. Payload: X-1E flight 25. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 24. First flight with elevated chamber pressure; cut short because overcast obscured pilot's view of lakebed..

1958 October 28 - .

X-1E Flight 26 - . Crew: McKay. Payload: X-1E flight 26. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 25. Elevated chamber pressure; good stability and control data gathered..

1958 November 6 - .

X-1E Flight 27 - . Crew: McKay. Payload: X-1E flight 27. Nation: USA. Related Persons: McKay. Class: Manned. Type: Manned rocketplane. Spacecraft Bus: XS-1. Spacecraft: X-1E. NACA flight 26. Elevated chamber pressure; low-altitude and low-mach investigation of U-Deta fuel. Last NASA flight..

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