High Quality Content by WIKIPEDIA articles! Boeing Rotorcraft Systems formerly Boeing Helicopters and before that Boeing-Vertol is a US aircraft manufacturer, part of Boeing Integrated Defense Systems. The factories are in Ridley Park, Pennsylvania, a suburb of Philadelphia, and in Mesa, Arizona.Boeing Helicopters was created as Boeing Vertol when the Vertol Aircraft Corporation company of Morton, Pennsylvania was acquired by Boeing in 1960; the Vertol name was an abbreviation for Vertical takeoff and landing. The company was responsible for the design and production of the CH-46 Sea Knight and the CH-47 Chinook. It became Boeing Helicopters in 1987, and adopted its current name later.When Boeing acquired McDonnell Douglas, the former Mesa, Arizona operations of Hughes Helicopters were merged into Boeing Helicopters. A year and a half later Boeing sold the civilian line of helicopters to MD Helicopter Holdings Inc., an indirect subsidiary of the Dutch company, RDM Holding Inc.

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