KaSkr-I Gyrocraft - In 1929 the first flight gyro KaSkr-1 “Red Engineer” NI Kamov and NK Skrzhinskogo, the first Soviet rotary-wing aircraft, IV Mikheev. The first flight took place on the gyro Khodynka and lasted only 15 seconds at a height of 2-3 meters, he flew a distance of 250 m. Revised design blades autogyro in the air lasted 2 minutes and 15 seconds at a height of 40 m, the horizontal flight speed of 60 km / h
source http://www.liveinternet.ru/users/kakula/post135713757/
