U.S. AIR FORCE / SCIENCE PHOTO LIBRARY U.S. AIR FORCE / SCIENCE PHOTO LIBRARY
First supersonic aircraft. Bell X-1 aircraft used by Charles "Chuck" Yeager to fly faster than sound on 14 October 1947. The X-1 was carried into the air under a converted B-29 bomber, and released at 6800 metres altitude over Muroc, California, USA. The X-1 was powered by a four-chamber XLR-11 rocket engine that generated 26.5 kilonewtons of thrust. This pushed the aircraft to a speed of 1078 kilometres per hour at an altitude of 12,800 metres - equivalent to 1.015 times the speed of sound. Yeager unofficially named the aircraft "Glamorous Glennis" after his wife. It is now displayed in a museum in Washington DC, USA.
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