The Washington Post

A different ‘turbo’

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“Breaking military barriers, then questionin­g the mission,” the Aug. 29 Book World review of Amy Mcgrath’s memoir, “Honor Bound: An American Story of Dreams and Service,” related the story of a young Mcgrath building a model of a World War II fighter plane, the P-47 Thunderbol­t, which was referred to as a “turboprop.” In fact, as with almost all fighters of that era, it was powered by a turbocharg­ed internal combustion engine. A turboprop is a jet engine turning a propeller. Turboprops did not fly in WWII.

Thomas Calhoun, Washington

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