Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Vintage glossy 8.5 x 11 photo of Igor Sikorsky posing below the rotor assembly of one of his helicopters, signed in fountain pen, "I. Sikorsky, June 6, 1956." In very good to fine condition, with scattered light creasing.
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