Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. TLS signed “I. Sikorsky,” two pages, 8.5 x 11, Sikorsky Aircraft letterhead, June 22, 1966. Letter to Henry E. Josten, editor and publisher at Curtiss Johnson Publications. In part: "I am glad to enclose a postal card which you may like to include in your exhibit. This helicopter, the VS-300, was presented to the Edison Institute Museum at Greenfield Village, Dearborn, Michigan after its final flight demonstrations on October 7, 1943…The VS-300 helicopter established a world record of endurance and is recognized as being the first successful helicopter produced in the Western Hemisphere." In fine condition, with two light paperclip impressions to the top edge.
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