F-16XL demonstrates new capabilities in flight test at Edwards Air Force Base

Abstract

The F-16XL was an evolutionary aircraft developed by building on the proved capabilities of the F-16's fly-bywire flight control system, relaxed static stability, and vortex flow control. Two F-16 fuselages were stretched and modified with a new cranked arrow wing that included a low-drag conformal weapon carriage. The goal was to provide improved operational effectiveness of the F-16 in the air-to-ground role without degrading the F-16's air-to-air capabilities. Design goals also included survivability enhancement through increased speed, maneuverability, and reduced radar signature along with retention of the F-16's reliability and maintainability through 80% commonality with the F-16. The F-16XL successfully met most of these goals. Improvements in air-to-ground effectiveness were a 35-65% increase in mission radius, an increased external weapons payload capability of 15,000 Ib, increased speed, and outstanding high-angle-of-attack flying qualities with air-to-ground weapons. Areas identified for improvement were primarily related to the low thrust-to-weight ratio of the XL during heavyweight takeoff and sustained maneuvering. The concepts demonstrated by the F-16XL will impact all future fighter aircraft design programs.