The Boeing X-46 was a proposed unmanned combat air vehicle (UCAV) that was to be developed in conjunction with the U.S. Navy and DARPA as a naval carrier-based variant of the Boeing X-45 UCAV being developed for the U.S. Air Force. Two contracts for technology demonstrators were awarded in June 2000, to Boeing for the X-46A and to Northrop Grumman for the X-47A.
However, in April 2003, the Air Force and the Navy efforts were formally combined under the joint DARPA/United StatesF/Navy J-UCAV program, later renamed J-UCAS (Joint Unmanned Combat Air Systems), and the X-46 program was terminated as redundant.
- "Uncertainty Engulfs Pentagon's Unmanned Aircraft Plans". Aviation Week and Space Technology, 13 September 2002.
- "Navy UCAS Program Set To Be Launched Within Weeks". Aviation Week and Space Technology, 21 July 2006.
- "Bids are in for U.S. Navys UCAS-D". Aviation Week and Space Technology, 1 April 2007.
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