Envelope-expansion flight-testing of the U.S. Navy’s Northrop Grumman X-47B has been completed at Edwards AFB, Calif., and the unmanned combat aircraft demonstrator will shortly be shipped to NAS Patuxent River, Md., to begin the work-up for aircraft carrier trials in 2013. All the envelope-expansion flights have been accomplished using the first X-47B air vehicle (AV-1), which has completed 16 flights since taking to the air for the first time on Feb. 4. The X-47B is designed to ...

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