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Published online by Cambridge University Press: 04 July 2016
The author accepted the invitation to present this paper on the rash assumption that he would be able to present something new and useful on the tilt-wing. The Hiller Company (in partnership with Vought and Ryan) was the first to have received a fully-fledged development contract for evaluation quantities of any VTOL machine. The VHR-447 which was selected as the Army, Navy and Air Force XC-142A was a culmination of almost ten years of effort spent in the investigation and promotion of the tilt-wing “propello-plane” VTOL aircraft concept.