Rebuilt from Northrop F-5A 63-8372, using also F-16 parts. Fitted with a 33% forward swept wing and canard control surfaces for a joint test programme DARPA/USAF/NASA with a/c being flown by the 6512 Test Squadron AF FTC. First flown 14.12.84, retired in 1991, now preserved at USAFM Dayton. Type also known as the X-29A.