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- Model-1058 A tilt-duct design in a Hiller study for the Navy Bureau of Aeronautics which compared several VTOL and STOL concepts. Ultimately, the tilt-wing concept was confirmed as the most advantageous to develop and build. In 1956, a tilt-wing (the 1058??) was submitted in a competition held by the Office of Naval Research. It was defeated by Vertol's lower-cost aircraft.
What was this competition ?,which won by Vertol ?.