Junkers F.13

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F.13

Junkers F-13 in Deutschen Museum
Type	6-seat transport
Manufacturer	Junkers
Designed by	Otto Reuter
Maiden flight	June 25, 1919
Produced	1919-1929
Number built	322

The Junkers F.13 (also known as the F 13, and developed under an engineering designation of J 13), was an all-metal transport German aircraft that first flew on June 25, 1919.

It was the world's first civilian plane with an all light metal internal skeletal frame. Tinplate was used for most of the skin, however. It flew with a Junkers airline until it merged with Lufthansa. Until 1922 the Junkers F13 was not allowed to operate in Germany due to the postwar restrictions. However 1919 and 1922 a number of airframes were sold to the USA (mostly to the US Post Office), France, England, Italy and Japan. In 1922/23, Hugo Junkers signed a contract with the Soviet Government to produce the aircraft in a Soviet factory . Several Junkers F 13 built there were used by the Red Army under the designation PS-3. A number of airframes also served in Soviet airlines. It saw active service until the 1940s, serving with many countries and being widely exported in many variants using Mercedes, BMW, Junkers, Armstrong, Gnome-Rhône Jupiter, Pratt & Whitney Hornet engines, and a seaplane variant.