United States industrialist (born in Russia) who designed the first four-engine airplane and the first mass-produced helicopter (1889-1972)
[ Syn: sikorsky , igor sikorsky , igor ivanovich sikorsky ]
United States industrialist (born in Russia) who designed the first four-engine airplane and the first mass-produced helicopter (1889-1972)
[ Syn: sikorsky , igor sikorsky , igor ivanovich sikorsky ]