Plans to demonstrate autonomous aerial refueling of the Northrop Grumman X-47B unmanned combat aircraft are a casualty of cuts in the U.S. Navy’s fiscal 2014 budget. Previous plans called for the X-47B naval unmanned combat air system demonstrator (UCAS-D) to conduct autonomous Navy-style probe-and-drogue and Air Force-style boom-and-receptacle refueling tests in 2014. The autonomous aerial refueling (AAR) tests were to follow the main demonstration of unmanned aircraft-carrier ...


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