Ryan NYP Low-Altitude Speed Calibration Run at Dutch Flats (May 1927)

Telephoto airfield photograph of the Spirit of St. Louis flying level at low altitude across Dutch Flats. — Ryan NYP Low-Altitude Speed Calibration Run at Dutch Flats (May 1927) · Donald A. Hall Estate Collection

An archival engineering action photograph capturing the Spirit of St. Louis flying at high speed at eye level across the dirt runway at Dutch Flats. Flying in level attitude just above the ground line, the image records Donald Hall and Charles Lindbergh conducting timed speed runs between measured ground markers to calibrate the cockpit pitot-static airspeed indicator prior to cross-country trials.