Boeing DH-4M-1 110

Boeing DH-4M-1 110 of the US Air Mail Service, seen before its modern restoration. The Boeing DH-4 was initially almost identical to the original de Havilland design, but powered by a Liberty L-12 engine. Boeing developed the aircraft further by substituting the wooden fuselage with a welded steel tube one. This aircraft was given the Post Office number 110 and operated on the CAM No.2 airmail route

Airmail Developed Dh-4 Further Fuselage Identical Initially L-12 No.2 Operated Substituting Welded

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