the "City of..." convention for its new streamliners, but was also nicknamed the "Tin Worm" or "Little Zip". It operated until December 1941, by which time its engine, after powering the train for approximately 995,000 miles, required replacement that was deemed prohibitively expensive. The trainset was scrapped the following year, with its aluminum recycled for use in the wartime aircraft industry. Legacy Union Pacific commissioned five diesel-powered streamliners during 1934–1936, evolved from the M-10000 design. The color scheme originated with M-10000 was used for UP's later streamliners, and changed incrementally to the Armour Yellow and Harbor Mist Gray livery that became UP's standard. The "Streamliner" name for M-10000 became the general term for locomotives and passenger trains styled with clean lines and an aerodynamic look. The high-mounted, behind-the-nose cab design originated with M-10000 was later adopted for EMC's E-Series and F-Series locomotives, although without the front-mounted air intake. Integrated-body-and-frame, or carbody, designs became standard for rail equipment where weight was a concern, such as early mainline diesel locomotives, passenger cars, urban mass transit rail, and high speed passenger rail. In popular culture In the 1937 children's book "Choo Choo: The Story Of An Engine Who Ran Away" by Virginia Lee Burton, an M-10000 is cast as the streamliner train that helps Choo Choo's crew pursue the title engine after she runs away. Once Choo Choo is found on an old unused track, her engineer, Jim, uses a chain to help the streamliner tow Choo Choo back to the big city as the M-10000 lacks couplers. References Footnotes Bibliography External links "The Iron Horse Goes Modern" Popular Mechanics, September 1933 -- detailed article on Union Pacific engineering research that lead to the M-10000 "Tuning Up A Streamliner" Popular Mechanics, November 1935 pp. 718-719 improvements resulting in the M-10001 , contemporary description of the train North American streamliner trains Diesel multiple units of the United States Articulated passenger trains Union Pacific Railroad locomotives Scrapped locomotives