Northrop Grumman’s X-47B unmanned combat air system (UCAS) demonstrator reveals an unprecedented emphasis on all-aspect stealth for the maritime environment. Unveiled at the company’s Palmdale, Calif., site on Dec. 16, the X-47B is the U.S. Navy’s first dedicated stealth aircraft since the ill-fated General Dynamics/McDonnell Douglas A-12, canceled in 1991. The X-47B is designed to demonstrate technology for a naval UCAS that would perform the stealthy strike mission originally intended ...


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