Sikorsky Aircraft Sikorsky Aircraft The Sikorsky Aircraft Corporation is an American aircraft manufacturer based in Stratford, Connecticut. It was established by Igor Sikorsky in 1923 and was among the first companies to manufacture helicopters for civilian and military use. Previously owned by United Technologies Corporation (UTC), in November 2015 Sikorsky was sold to Lockheed Martin. On May 23, 1923, the "Sikorsky Aero Engineering Corporation" was founded near Roosevelt Field by Igor Sikorsky, an immigrant to the United States who was born in Kiev. In 1925 the company name was changed to "Sikorsky Manufacturing Company". In 1929 the company moved to [[Stratford, Connecticut]],
Sikorsky S-9 completion the S-9 was found to be substantially heavier than anticipated and the engine only delivered 80% of its rated horsepower. Initial flight tests revealed very poor performance. The engine was replaced by a Gnome Monosoupape and further flights showed only a nominal increase in speed. The machine was eventually scrapped. Sikorsky S-9 The Sikorsky S-9 "Kruglyj" (Rounded One) was a Russian single engine prototype aircraft completed in the spring of 1913 by the Russian Baltic Railroad Car Works while Igor Sikorsky was the chief engineer of the aircraft manufacturing division. The S-9 was a three-seat mid-wing monoplane with constant-chord