Sikorsky X2 Sikorsky X2 The Sikorsky X2 is an experimental high-speed compound helicopter with coaxial rotors developed by Sikorsky Aircraft. Sikorsky developed the X2 helicopter on a $50 million budget. The design includes expertise gathered from several earlier design projects. The S-69/XH-59A Advancing Blade Concept Demonstrator had shown that high speed was possible with a coaxial helicopter with auxiliary propulsion (two jet engines), but that vibration and fuel consumption was excessive; the Cypher UAV expanded the company's knowledge of the unique aspects of coaxial flight control laws with a fly-by-wire aircraft; and the RAH-66 Comanche developed expertise in composite rotors and advanced
Sikorsky S-38 the Sikorsky Manufacturing Corporation of Long Island, New York, and by the Sikorsky Aviation Corporation in Bridgeport, Connecticut. Sikorsky was acquired by United Aircraft and Transport Corporation in mid-production. Some famous owners include: During the 1990s two reproduction S-38s were built by the late Buzz Kaplan’s “Born Again Restorations,” of Owatonna, Minnesota. One was produced for Samuel Curtis Johnson Jr., the son of Herbert Fisk Johnson, to recreate his fathers flight, which he completed in 1998. the plane is suspended from the ceiling of Fortaleza Hall in the S. C. Johnson & Son company headquarters in Racine, Wisconsin . The