As Lockheed Martin and Piasecki Aircraft begin building a vertical-takeoff-and-landing (VTOL) cargo unmanned aircraft for the Defense Advanced Research Projects Agency (Darpa), talks are underway with potential military service users on what an operational vehicle could look like. With its origins in a Darpa program to develop a flying jeep, the diameter of the dual ducted fans on the Aerial Reconfigurable Embedded System (ARES) demonstrator was set at 8.5 ft. so that the vehicle, with lift ...


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