UCAS-D Flight Slips, But Sea Trials Still On Track, Navy Says
SLOW START: First flight of the U.S. Navy’s Northrop Grumman X-47B unmanned combat air system demonstrator has slipped from late 2009 to the first quarter of 2010 after propulsion acoustic and engine-start sequencing issues uncovered during ground checkout at Edwards Air Force Base, Calif., forced...
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