Boeing Model 40
The Boeing Model 40 was a continuous tape as a biplane single-engine mail plane of the 1920s. It was the first used for passenger transport model of the American manufacturer Boeing.
History
1925 required the U.S. Mail an aircraft for the carriage of mail. Boeing developed then the Model 40, which made its first flight on 20 July 1925. In the competition she succumbed to the Douglas M -2. In 1927, the draft of the Model 40A was further developed, participated with Boeing in the bidding process for the privatized airmail routes. On May 20, 1927, the new version of held its maiden flight.
As a drive for the conventionally designed biplane, the U.S. Mail had originally demanded the outdated Liberty engine, which should come from military stocks. In the new version it was replaced by the lighter Pratt & Whitney Wasp engine, which increases the load and operating costs could be lowered. The frame was now completely out of welded metal pipes, as wings served with fabric -covered wooden structures. To ensure the option to bet on as many advertised routes, the developers focused in the cabin, a two passenger seats.
Boeing was awarded the contract for the air mail route between San Francisco and Chicago, which was operated by Boeing Air Transport Corporation from 1 July 1927 24 Boeing 40A.
Until the end of production in 1932 a total of 77 aircraft originated in different variants. As proved to be the most successful version designed for four passengers Model 40B - fourth
Versions
- Model 40 - Prototype from 1925 with Liberty engine
- Model 40A - Improved version of 1927 Wasp engine for Boeing Air Transport ( 25 aircraft )
- Model 40B - Former Model 40A with Pratt & Whitney Hornet engine; later than 40B - 2 denotes (19 tags ) Model 40B -4 - Improved Model 40B with 4 passenger seats, and other changes (38 aircraft) Model 40B -4A - a Model 40B for Pratt & Whitney, used as a test aircraft
- Model 40H -4 - four Model 40B -4, built by Boeing Canada
Aircraft received
- The Boeing 40C S / N 1043 is the only aircraft capable of flight preserved, making it the world's oldest flying Boeing.
- The Henry Ford Museum in Dearborn, Michigan has a Boeing 40B -2, number 285, built in 1927.
- The Museum of Science and Industry in Chicago, Illinois is a Boeing Model 40- B in 1928 from ( N288 ).
- The Museum of Flight in Seattle, Washington has a full replica and two hulls under construction as an example of the production in the late 1920s.