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The X-15's highest speed, 4,520 miles per hour (7,274 km/h; 2,021 m/s), [1] was achieved on 3 October 1967, [2] when William J. Knight flew at Mach 6.7 at an altitude of 102,100 feet (31,120 m), or 19.34 miles.
Walker piloted the X-15 to an altitude of 107.96 km and remained weightless for approximately five minutes. The altitude was the highest crewed flight by a spaceplane to that time, and remained the record until the 1981 flight of Space Shuttle Columbia.
Joseph Walker set the program's top two altitude records on its 90th and 91st free flights (347,800 and 354,200 feet, respectively), becoming the only pilot to fly past the Kármán line, the 100 kilometer, FAI -recognized boundary of outer space, during the program.
Forty-six years ago this month, NASA chief research pilot Joseph A. Walker flew X-15 Ship No. 3 (S/N 56-6672) to an altitude of 354,200 feet. This flight would mark the highest altitude ever achieved by the famed hypersonic research vehicle.
In the joint X-15 hypersonic research program that NASA conducted with the U.S. Air Force, the Navy, and North American Aviation Inc., the aircraft flew during a period of nearly 10 years and set the world’s unofficial speed and altitude records of 4,520 mph (Mach 6.7) and 354,200 feet in a program to investigate all aspects of piloted ...
the heart rate of an X-15 pilot ranged from altitude of 100,000 feet, which heated the skin 145 to 185 beats per minute as the adrenaline of the airplane until it glowed nearly red-hot. it surged. chest-to-back acceleration was 2-g could also accelerate from mach 5 to mach 6 in
On Apr. 20, 1962, Armstrong carried out the longest flight of the X-15 program, a duration of 12 minutes and 28 seconds. On this same flight, he achieved his highest altitude, 207,500 feet. On his return, Armstrong inadvertently pulled too high an angle of attack during pullout.
Brought to the launch altitude of 45,000 feet under the wing of a B-52 bomber and dropped at a speed of Mach 0.8, the X-15 was capable to reach the edge of space at an altitude between...
On Sept. 17, at the controls of X-15-2, Crossfield completed the first powered flight of an X-15. Firing all eight of the XLR-11 engines for 224 seconds, he reached a speed of Mach 2.11, or 1,393 miles per hour, and an altitude of 52,341 feet.
The X-15 set the altitude and speed records in the 1960s and even reached the edge of space. At its fastest and highest, it traveled at 4,520 miles per hour (7,274 kmh), almost seven times the speed of sound. To reach this speed it flew at a height of 102,100 feet (31,120 m, or about 19.3 miles up).