page_title: Boeing X-45
section_title: X-45B/C
hierarchical_section_title: Boeing X-45 / Variants / X-45B/C
caption_attribution_description: Boeing's mockup of the X-45C UCAV shown on static display at Nellis AFB's 2004 "Aviation Nation" airshow.
context_page_description: The Boeing X-45 unmanned combat air vehicle is a concept demonstrator for a next generation of completely autonomous military aircraft, developed by Boeing's Phantom Works. Manufactured by Boeing Integrated Defense Systems, the X-45 was a part of DARPA's J-UCAS project.
context_section_description: The larger X-45B design was modified to have even more fuel capacity and three times greater combat range, becoming the X-45C. Each wing's leading edge spans from the nose to the wingtip, giving the aircraft more wing area, and a planform very similar to the B-2 Spirits'. The first of the three planned X-45C aircraft was originally scheduled to be completed in 2006, with capability demonstrations scheduled for early 2007. By 2010, Boeing hoped to complete an autonomous aerial refueling of the X-45C by a KC-135 Stratotanker. Boeing has displayed a mock-up of the X-45C on static displays at many airshows.
  The X-45C portion of the program received $767 million from DARPA in October 2004, to construct and test three aircraft, along with several supplemental goals. The X-45C included an F404 engine.  In July 2005, DARPA awarded an additional $175 million to continue the program, as well as implement autonomous Aerial refueling technology.
  On March 2, 2006, the US Air Force decided not to continue with the X-45 project. However, Boeing submitted a proposal to the Navy for a carrier based demonstrator version of the X-45, designated the X-45N.
caption: The newer, larger X-45C
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