Igor Sikorsky's First Successful Helicopter | The Henry Ford's Innovation Nation
Igor Sikorsky, as a young man in Russia, tried unsuccessfully to build a helicopter in 1909. He went on to build fixed-wing aircraft but returned to helicopters in 1938. Within three years, he had developed the first successful, practical single-rotor helicopter in the United States: the VS-300.
See this helicopter on exhibit at the Henry Ford Museum of American Innovation.