Unloading a Model 40A Mailplane

Passengers and Pilot with the Boeing Model 40B Transport

40A Mail Plane

Boeing Model 40C at Gorst's Field

Model 40B with Passengers

Model 40Y Special Order Model 40

William Boeing with a Model 40

Model 40B-4 Mailplane Radio Ship Model

Boeing Model 40A Mail Plane

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Boeing Model 40 with Special Passenger

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The first Model 40 was built for a 1925 U.S. Post Office competition as a replacement for the converted military de Havillands that had carried the airmail since 1918. The Model 40 used steel tubing for the nose and curved wood-veneer laminate for the middle of the fuselage. The wings were wood and fabric. The plane was hampered by the antiquated water-cooled Liberty engine, required by the government in order to use up large stocks of surplus war equipment.

BI231019 (hs3618)

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8.0in × 5.1in (300dpi)

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