WALKER, Joseph Albert, with Bell Aircraft X-1E 46-063 Published on November 6, 2012 in 6 November 1958Full resolution (2560 × 2329) ← Previous Next → NACA test pilot Joseph Albert Walker made 21 of the X-1E’s 26 flights. In this photograph, Joe Walker is wearing a David Clark Co. T-1 capstan-type partial-pressure suit with a K-1 helmet for protection at high altitudes. (NASA)