Air-to-Air Flight Test of Hall X-1 Prototype Above Coastal Clouds (1928)

An air-to-air photograph of the Hall X-1 prototype X7621 banking in high-altitude flight above the coastal marine layer and Pacific Ocean. — Air-to-Air Flight Test of Hall X-1 Prototype Above Coastal Clouds (1928) · Donald A. Hall Estate Collection

A breathtaking air-to-air document capturing the experimental Hall X-1 (X7621) soaring at altitude above a dense marine cloud layer off the Southern California coast. Flown with two crew members wearing leather flight helmets and goggles in the open tandem cockpits, the sleek monoplane reveals its V-strut wing bracing, streamlined landing gear, and bold registration on the vertical rudder. Hall orchestrated these air-to-air photo missions to verify trim characteristics and aerodynamic efficiency at cruising altitude.