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Multi-motored Airplanes, 1933


Information from the following sources was used in the compilation of these webpages. We encourage you to consult these works to broaden your knowledge of Sikorsky and his accomplishments.

Sikorsky Archives News:

Helicopter History Site:

Air Transportation: The Pioneering Years: Commercial Aviation 1920-1930:

Principles of rotary flight: | Helicopter Theory - Early History: | STRAIGHT UP:

Nat' Academies Press, Memorial Tributes: National Academy of Engineering Vol. 1 (1979):

Sikorsky: Our History:,3036,CLI1_DIV69_ETI683,00.html

St. Petersburg: through centuries - My father's fate: