Sikorsky, a Lockheed Martin company has successfully validated the advanced control laws to successfully fly a ‘rotor blown wing’ uncrewed aerial system (UAS) in both helicopter and airplane modes. Powered by batteries, the 115 pounds (52kg) twin prop-rotor prototype has demonstrated operational stability and maneuverability across all flight regimes, and the potential to scale the unique vertical take-off and landing (VTOL) design to larger sizes requiring hybrid-electric propulsion.