What Might Have Been: A conceptual USAF/Northrop Grumman FB-23 prepares to take on fuel from a KC-10A. During the fall of 2005 Northrop Grumman released limited information regarding their FB-23 design for a stealthy deep-strike derivative of the YF-23A. Although drastically improving its range and payload, the FB-23 retained the tandem wing low observable attributes of the original YF-23A. The fuselage was lengthened to accommodate a larger weapons bay, and the cockpit was now a two-seat arrangement redesigned for sustained flight above Mach 2. The FB-23 proposal was not funded. Details are covered in Chapter 9 of, "A Complete History of U.S. Combat Aircraft Fly-Off Competitions", by Erik Simonsen. Erik Simonsen photo/illustration
