Successful demonstration of the 1922 Berliner No. 4 machine

Friday, June 16, 1922 - College Park Airport, Maryland, United States of America



This is deemed to be the first successful demonstration of a controllable helicopter in the USA, capable of hover, transition into forward flight and landing safely.

Source: The Berliner Vertical Lift Aircraft 1919-1924, J. Gordon Leishman, VERTIFLITE Spring 2002, Page 31


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Émile Berliner