, the world’s first four-engine passenger aircraft, which was later used as a bomber during World War I. Transoceanic Flying Boats: His company, Sikorsky Aircraft (now part of Lockheed Martin), built the famous
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Designed and flew the first large multi-engine airplanes in the world. Emigrated to the U.S. and founded the Sikorsky Aero Engineering Corporation Successfully piloted the , proving the single main rotor concept. His company, , produces the Black Hawk , the world’s first four-engine passenger aircraft, which