Welcome back to our channel for a feature on the incredibly versatile CH-47 Chinook transport helicopter and its ability to insert special operations forces in any climate or location. The Boeing CH-47 Chinook is a tandem rotor helicopter developed by American rotorcraft company Vertol and manufactured by Boeing Vertol. The Chinook is a heavy-lift helicopter that is among the heaviest lifting Western helicopters. Its name, Chinook, is from the Native American Chinook people of Oregon and Washington state. The Chinook was originally 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.