UAV air taxi concept reveals clear thinking about VTOL efficiency

UAV air taxi concept reveals clear thinking about VTOL efficiency
http://www.flightglobal.com/news/articles/UAV-air-taxi-concept-reveals-clear-thinking-about-VTOL-efficiency-393783/

An Austrian unmanned air systems entrepreneur with a novel take on the problem of combining vertical lift with fast horizontal flight has unveiled a fully automated air taxi concept that promises fly-anywhere capability and 6-10h endurance from a heavy fuel engine.

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