Airplane piloted by Fred Drinkwater conducted flight testing that demonstrated steep approaches that were used by the space shuttle.

Lockheed JF-104A (AF56-745A Tail No. 60745) Starfighter airplane piloted by Fred Drinkwater conducted flight testing that demonstrated steep approaches that were ultimately used by the space shuttle. Steep descent testing, including power-off landing approaches and demonstration of minimum lift-to-drag ratio (L/D) landings came out of the interest in the use of low L/D lifting bodies for recovery to landing from space. Note: Used in publication in Flight Research at Ames; 57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig 93