AF flight 42. Familiarization flight. Mach 1.22 at 12200 m.
AF flight 43. Check of pressure suit for altitude operation. Mach 1.24 at 14640 m. Rocket fire and automatic engine shutdown.
AF flight 45. Altitude attempt. Only 2 cylinders fired.
AF flight. Engine chamber exploded, jamming rudder. Everest landed safely.
AF flight 48. Altitude attempt. Attained 20388 m altitude.
AF flight 49. Altitude attempt. Attained 21930 m altitude.
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.
AF flight 53. High-altitude wing-tail loads investigation.
AF flight 54. High-altitude wing-tail loads investigation.
AF flight 55. Wing-and-tail-loads investigation.
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.
First glide flight. Damaged on landing.
AF flight 9.
AF flight 10. Mach 2.3 at 19825 m.
Second glide flight. Propellant system check. Minor damage on landing.
3d 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.
Aborted powered flight attempt; became 4th glide flight.
First powered flight. Mach 0.992 at 10,675 m. Slight fire damage from engine bay fire.
Second powered flight, mach 0.91.
3d powered flight, mach 1.4 at 15250 m.
Fourth powered flight, mach 1.683 at 16,378 m.
Fifth powered flight, mach 1.8 at 18,300 m.
Sixth powered flight, mach 2.53 at 17.803 m.
Eighth powered flight, premature engine shutdown.
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.