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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. Walker landed the X-15 about 12 minutes after it was launched, at Rogers Dry Lake, Edwards ...
Twelve pilots flew the X-15 over the course of its career. Scott Crossfield and William Dana flew the X-15 on its first and last free flights, respectively. 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 ...
The X-15 reaction control system (RCS), for maneuvering in the low-pressure/density environment, used high-test peroxide (HTP), which decomposes into water and oxygen in the presence of a catalyst and could provide a specific impulse of 140 s (1.4 km/s).
Flight 188 used North American Aviation X-15 Number 2 aircraft, number 56-6671, 2A-F12. The X-15, model X-15A-2 had many modifications from the original X-15A. The X-15 number 2 on, flight 74, was damaged during landing on November 9, 1962, and was repaired and updated to become the X-15A-2. The X-15A-2 fuselage was lengthened 28 inches (0.71 ...
Walker would go on to fly the X-15 25 times, [2] including the first flight of a human into the mesosphere, Flight 35, and the only two flights that exceeded 100 kilometres (62 miles) in altitude, Flight 90 (on July 19, 1963: 106 km (66 mi)) and Flight 91 (on August 22, 1963: 108 km (67 mi)).
Flight 90 of the North American X-15 was a research flight conducted by NASA and the US Air Force on July 19, 1963. It was the first of two X-15 missions that passed the 100-km high Kármán line, the FAI definition of space, along with Flight 91 the next month. The X-15 was flown by Joseph A. Walker, who flew both X-15 spaceflights over the ...
He flew the aircraft 14 times during the following two years, reaching a maximum speed of 3,712 mph (Mach 5.48) and a peak altitude of 214,100 feet on separate flights. The X-15 program provided a wealth of data on aerodynamics, thermodynamics, propulsion, flight controls, and the physiological aspects of high-speed, high-altitude flight.
X-15 Flight 3-65-97, also known as X-15 Flight 191 (being the 191st free flight of the X-15), was a sub-orbital spaceflight of the North American X-15 experimental spaceplane, carrying seven experiments to a peak altitude of 266,000 feet (50.4 mi; 81 km; 43.8 nmi), above NASA's definition of the start of space at 50 miles (80 km) but below the Kármán line definition at 62 miles (100 km).