| |
| | Sikorsky |
 | | Sikorsky, who fled from the Bolshevik Revolution in 1917, encouraged the United States Government to agree to a considerable budget of two million dollars for rotary-wing research in 1938. |
 | | Igor Sikorsky build his first machine in Russia, but this first Sikorsky helicopter never left the ground, and a second which followed in 1910 fails too, so he stopped and turn to fixed wing aircraft until 1930. |
 | | In the 1920s and 1930s Sikorsky produced land-based aircraft, amphibians and flying-boats, including the flying Clippers, which pioneered commercial transoceanic air routes. |
| www.helis.com /timeline/sikorsky.php |
|