Igor Sikorsky

Igor Ivanovich Sikorsky (May 25, 1889 – October 26, 1972) was a Russian pioneer of aviation who designed the first four-engine aeroplanes and the first modern helicopter.

Further reading

• Sikorsky's autobiography, The Story of the Winged S. (originally published 1938; updated editions, various years up to 1948)
• Frank J. Delear, Igor Sikorsky: His Three Careers in Aviation (New York, 1969) - described as "the only biography"http://www.ctheritage.org/encyclopedia/ctsince1929/sikorsky.htm