X-Plane 10 Northrop X47B Autonomous UAV 1.00. The Northrop Grumman X-47B is a demonstration unmanned combat air vehicle designed for carrier-based operations. Developed by the American defense technology company Northrop Grumman, the X-47 project began as part of DARPA's J-UCAS program, and is now part of the United States Navy's Unmanned Combat Air System Demonstration program. The X-47B first flew in 2011, and as of 2014, it is undergoing flight and operational integration testing, having successfully performed a series of land- and carrier-based demonstrations. Documentation is included in the package. By Billy Bargagliotti.