Word: slipstreamer
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Dates: during 1929-1929
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When he was ready to fly Señor de la Cierva started his tractor motor with his landing wheel brakes on. Then he had a bystander give his vanes a shove. They wobbled around about once a minute. He speeded up his motor and the propeller slipstream made the vanes rotate rapidly, about 130 r.p.m., according to their speedometer. The vanes vibrated. To smooth that out he idled his motor for five seconds. Then he released his brakes, sped up the motor again, taxied to his takeoff. The vanes were turning smoothly at 120 r. p. m. and creating...