Screen Shot 2023-05-01 at 14.06.48 Published on May 1, 2023 in 3 May 1948Full resolution (1113 × 890) ← Previous Next → Howard Clifton Lilly, NACA engineering test pilot, with his 1946 Thompso Trphy racer, Bell P-63A NX69901. (NASA E-49-0091)