Arsenal | CH-47C Chinook Helicopter

The CH-47 arose from a 1956 decision to replace the U.S. Army’s piston-engine helicopters with more powerful gas-turbine models. After a yearlong debate over mission requirements, the Army settled on two designs: a troop carrier, the Bell UH-1 Iroquois, soon nicknamed the Huey; and a heavy-lift helicopter, the Boeing-Vertol YHC1B, which first flew on Sept. …

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