Sikorsky has revealed the unmanned Rotor Blown Wing concept it is designing with Lockheed Martin's Skunk Works under Phase 1 of the Defense Advanced Research Projects Agency's (Darpa) vertical-takeoff-and-landing experimental aircraft (VTOL X-Plane) program. Sikorsky has received a $14.4 million contract for the 22-month conceptual and preliminary design phase. Darpa plans to make up to four Phase 1 awards and select one to be built and flown under Phases 2 and 3. Aurora Flight Sciences ...


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