Among Sikorsky's chief supporters was composer Sergei Rachmaninoff, who introduced himself by writing a check for US$5,000 (approximately $61,000 in 2007).
Jedan od najvećih sponzora je skladatelj Sergej Rahmanjinov, koji ispisuje ček na 5.000 dolara (u 2007. godini bilo bi to iznos oko 61.000 dolara).