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The Hiller HJ-1 Hornet was used to test the use of a jet-powered helicopter using ramjets. It was evaluated by the United States Army as the YH-32. 18 were built. The concept was considered to be outdated and the program was cancelled.
This photo is copyright © Paul Seymour, and may not be used or published in any way without permission.
It was added on 2 October 2022, and has since been viewed 255 times.