The Boeing CH-47 Chinook is an American twin-engined, tandem rotor, heavy-lift helicopter developed by American rotorcraft company Vertol and manufactured by Boeing Vertol (later renamed Boeing Helicopter and now named Boeing Rotorcraft Systems).The CH-47 is among the heaviest lifting Western helicopters. The Bell Model 204 was the leading design for a US Army competition in the 1950’s to provide a helicopter capable of medical evacuations as well as instrument flight training. US Navy and US Marine Corps BuNos Third Series (150139 to 156169) Last revised May 4, 2021 Its name, Chinook, is from the Native American Chinook people of Washington state. Entering into production in the late 1950’s the HU-1A was quickly revised into the HU-1B … The Sikorsky UH-60 Black Hawk is a four-blade, twin-engine, medium-lift utility helicopter manufactured by Sikorsky Aircraft.Sikorsky submitted the S-70 design for the United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972. Nicknamed "Loach", after the acronym LOH for Light Observation Helicopter, the nimble OH-6 Cayuse, built by Hughes Helicopters performed missions that bigger, slower and louder helicopters could not.
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