Arnold AFB TN (SPX) Dec 03, 2007 – The secretary of the Air Force viewed the first ground testing of the General Electric F101 engine using a 50-50 mix of Fischer-Tropsch and JP-8 jet fuels Nov. 27 at Arnold Air Force Base. Secretary Michael W. Wynne witnessed the first series to qualify a high-performance, afterburning engine with FT fuel for a combat aircraft at the Arnold Engineering Development Center.