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First Soviet helicopter (1930-1932) Cheryomukhin TsAGI 1-EA (ЦАГИ 1-ЭА) - YouTube
https://www.youtube.com/watch?v=rx565dqF-5M
Тhe first flight on November 16 1930 on height over fifty meters. Record-setting flight on August 14 1932 the height of 605 meters is reached.(information wa...