Sikorsky S-75 Sikorsky S-75 The Sikorsky S-75 was a proof-of-concept all-composite helicopter. Sikorsky Aircraft used all-composite materials to replace metal to provide greater strength, lighter weight, lower manufacturing costs, and reduce maintenance costs. The Sikorsky S-75 was developed under the US Army's Advanced Composite Airframe Program (ACAP), the goal of which was the development of an all-composite helicopter fuselage, lighter and less costly to build than predominantly metal airframes in support of the Light Helicopter Experimental (LHX) program. In February 1981, contracts were awarded to Sikorsky and Bell Helicopter, with Bell submitting its Model D292. The S-75 flew for the first time
Igor Sikorsky designed the first heavy bomber for Russia. In 2013, "Flying" magazine ranked Sikorsky number 12 on its list of the 51 Heroes of Aviation. On March 22, 2018 the Kiev city council officially renamed Kiev airport "International Airport "Kyiv" (Zhulyany) named after Igor Sikorsky". Sikorsky was a deeply religious Russian Orthodox Christian and authored two religious and philosophical books ("The Message of the Lord's Prayer" and "The Invisible Encounter"). Summarizing his beliefs, in the latter he wrote: Igor Sikorsky Igor Ivanovich Sikorsky (, "Ígor' Ivánovič Sikórskij"; May 25, 1889 – October 26, 1972), was a Russian-American aviation pioneer in both