Word: keplerian
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Dates: during 1950-1959
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...cirrus-dappled air over North Carolina's Chowan River. This area was set aside for acrobatics, cleared of other aircraft. In the Super Sabre, Brett could have wafted into weightlessness by flying high and level, faster than sound, and pushing the plane's nose up into the Keplerian trajectory, in which centrifugal force exactly cancels the earth's gravitational pull. Despite his plane's vast speed reserve, he chose to work at lower altitudes, enter the parabola from a power dive (see diagram). Over "hot mikes" (both microphones always switched on, so that each...
...Aerobee rocket in 1952. Highest human: Captain Iven C. Kincheloe Jr., who got to 126,000 ft. (24 miles) in the U.S.A.F.'s X2, for "a couple of minutes" in 1956. * About 38 hours, piled up in hundreds of missions and thousands of maneuvers (flying a Keplerian trajectory or parabolic outside-loop curve in high-speed jet airplanes), for periods from 30 to 43 seconds...
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