Igor. 1889–1972, US aeronautical engineer, born in Russia. He designed and flew the first four-engined aircraft (1913) and designed the first successful helicopter (1939)
Sikorsky in American English
(sɪˈkɔrski)
ˈIgor (Ivanovich) (ˈigɔr) 1889-1972; U.S. aeronautical engineer, born in Russia