3. X-47B UAV
The Northrop Grumman X-47B is a demonstration unmanned combat air vehicle (UCAV) designed for aircraft carrier-based operations. The X-47B is a tailless jet-powered blended-wing-body aircraft capable of semi-autonomous operation and aerial refueling. In April 2015, the X-47B once again made aviation history by successfully conducting the first ever Autonomous Aerial Refueling (AAR) of an unmanned aircraft.
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