In June 1923, Lieutenants Smith and Richter stayed aloft over Rockwell Field, (now, NAS North Island) at San Diego, California, with multiple refuelings. This photographs shows the DH.4B tanker and receiver on that endurance flight. (U.S. Air Force)
Refueling in mid-air by Capt. Lowell H. Smith and Lt. John P. Richter, at Rockwell Field, California, June 1923. They stayed in the air 4 days. DeHaviland airplanes used.