Unloading a Model 40A Mailplane

Model 40A Mailplane Assembly

Boeing Model 40A Mail Plane

Model 40A on Ground

40A Mail Plane

Model 40A Mailplane Cockpit

Model 40A Mailplanes at Boeing Field

Model 40A Soars over Nevada’s Ruby Mountains

Boeing Model 40A Mail Plane in Flight Above Nevada's Ruby Mountains

Model 40B-4 Mailplane Manufacturing

Model 40B-4 Mailplane Radio Ship Model

Engine Installation Mail Plane 40-A

Boeing Model 40 with Special Passenger

Boeing Model 40C at Gorst's Field

Passengers and Pilot with the Boeing Model 40B Transport

Mailplane Progress

Model 40B with Passengers

Model 40 on Ground

Model 40Y Special Order Model 40

William Boeing with a Model 40

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Model 40A Flight Line

The first Model 40 was redesigned as the Model 40A in 1927ùusing an air-cooled engine. This engine was about 200 pounds lighter than the water-cooled engines used by competitors for the airmail contract, so the Model 40A won and became the first Boeing-built airplane to carry paying passengers as well as mail. The four-passenger-Model 40B-4 was the major production model of the first Boeing mailplane. It had extra cabin windows and could carry four people as well as 500 pounds of mail. The Model 40 series (A, B, and C) flew under the banner of Boeing Air Transport, a new company subsidiary. Models 40X and Y were custom-built for oil companies.

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Unique identifier BI220258

Boeing ID hs1665

Type Image

Size 6000px × 3200px 18MB

License type RM

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