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The Hiller VXT-8 Coleopter was a proposed annular wing VTOL aircraft designed in the United States in the late 1950s, inspired by the French SNECMA Coléoptère. The project did not progress beyond the mockup stage.
Hiller and United Helicopters aircraft | |
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| Civil helicopters | |
| Military helicopters | |
| Experimental helicopters | |
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