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- 1927 Boeing Model 40-B2 Biplane - Subsidies from the federal government for air mail encouraged the development of improved long-distance aircraft like the Boeing 40. The key to the Boeing's success was the use of a lightweight air-cooled radial engine which allowed it to carry the mail and two paying passengers. This plane flew between Chicago and San Francisco, making 12 fuel stops along the way.

- 1927
- Collections - Artifact
1927 Boeing Model 40-B2 Biplane
Subsidies from the federal government for air mail encouraged the development of improved long-distance aircraft like the Boeing 40. The key to the Boeing's success was the use of a lightweight air-cooled radial engine which allowed it to carry the mail and two paying passengers. This plane flew between Chicago and San Francisco, making 12 fuel stops along the way.
- Loading U.S. Mail into Wing Bin on National Air Transport's Ford Tri-Motor 5-AT-87 at Ford Airport, Dearborn, Michigan, 1930 - Among the interesting features on Ford's later Tri-Motors were storage bins built into the wings. TWA added the bins to some of its Tri-Motors in 1932. They provided room for mail and luggage without taking up limited cabin space. Ford liked the idea so much that it incorporated wing bins into the 5-AT-D model.

- November 25, 1930
- Collections - Artifact
Loading U.S. Mail into Wing Bin on National Air Transport's Ford Tri-Motor 5-AT-87 at Ford Airport, Dearborn, Michigan, 1930
Among the interesting features on Ford's later Tri-Motors were storage bins built into the wings. TWA added the bins to some of its Tri-Motors in 1932. They provided room for mail and luggage without taking up limited cabin space. Ford liked the idea so much that it incorporated wing bins into the 5-AT-D model.