
Boeing CH-47 Chinook
American tandem-rotor helicopter introduced in 1962 during the Cold War

American tandem-rotor helicopter introduced in 1962 during the Cold War
The Boeing CH-47 Chinook is a tandem-rotor helicopter originally developed by American rotorcraft company Vertol and now manufactured by Boeing Defense, Space & Security. The Chinook is the second-heaviest-lifting Western heavy-lift helicopter, behind the Sikorsky CH-53. Its name comes from the Chinook people, who are indigenous to the Pacific Northwest of the United States. The Chinook was designed by Vertol, which had begun work in 1957 on a new tandem-rotor helicopter, designated as the Vertol Model 107 or V-107. Around the same time, the United States Department of the Army announced its intention to replace the piston-engine–powered Sikorsky CH-37 Mojave with a new, gas turbine–powered helicopter. During June 1958, the U.S. Army ordered a small number of V-107s from Vertol under the YHC-1A designation; following testing, some Army officials considered it to be too heavy for the assault missions and too light for transport purposes. While the YHC-1A would be improved and adopted by...
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