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 The concept was considered to be outdated and the program was cancelled.

In the slide the fiberglass fuselage is removed, with the tail boom extended to the left. The YH-32 was powered by a Hiller 8RJ2B ramjet mounted on each rotor blade tip. It had high fuel consumption which led to poor range, and it was very noisy. It did, however, have a powerful lifting capacity. This a/c is now on display at the Museum of Flight in Seattle, WA.