Screen Shot 2019-11-20 at 11.14.40 Published on November 20, 2019 in 22 November 1952Full resolution (1019 × 798) ← Previous Next → Republic XF-91 (NASA E-475) This NACA High-Speed Flight Research Station photograph of the Republic XF-91 Thunderceptor, was taken in 1951 on the South Base ramp at Edwards Air Force Base.