1924 United States Army Air Service aircraft designation system

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In 1924, problems with the previous designation system led to a general revamping of the designation system used by the United States Army Air Service. This system was to remain in effect with the U.S. Army Air Corps, the U.S. Army Air Forces and the independent U.S. Air Force, as well as those aircraft remaining in the U.S. Army after 1947. With some minor changes it became the basis of the 1962 United States Tri-Service aircraft designation system.