Boeing Model 40

[1] The resultant aircraft, the Boeing Model 40, was a conventional tractor biplane, with the required Liberty engine housed in a streamlined cowling with an underslung radiator.

The aircraft's fuselage had a steel tube structure, with an aluminum and laminated wood covering.

The wings and tail were of wooden construction, and the Model 40 had a fixed conventional landing gear.

After being recovered, it was completely rebuilt over an eight-year period from 2000 to 2008 and an estimated 18,000 man hours by Pemberton and Sons Aviation[14] in Spokane, Washington.

[15] In September, 2017, it was sold to the Western Antique Aeroplane & Automobile Museum in Hood River, Oregon.

The Museum of Science and Industry in Chicago, Illinois has a 1928 Boeing Model 40-B on display in its Transportation Gallery.

Model 40C at Oshkosh 2008. Both passenger entry doors, one for each of the two-seat rows, are on the left side of the fuselage.
Cover flown from San Francisco to Chicago by a Model 40A operated by Boeing Air Transport on the first day U.S. Transcontinental Air Mail under Contract. July 1, 1927
A Boeing Model 40 flying over mountains in Washington State, 1930s.
Boeing Model 40C at Oshkosh 2008
Model 40C Pilot's panel with some modern features added for safe operation
Model 40C front seat of rear passenger cabin showing the fold-down writing desk/table