Word: xia
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Dates: during 1953-1953
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...twirled their first pusher propeller, the Air Force's Major Charles E. ("Chuck") Yeager, 30, attained the highest known speed ever to be reached by pilot and plane. His rocket-powered aircraft (released from a B-29 bomber at 30,000 ft. for the run): the experimental Bell XIA, a new relative of the XI, with which Chuck Yeager first cracked the sound barrier in level flight (TIME, April 18, 1949). His speed: more than 1,600 m.p.h., 2½ times the speed of sound...