John Speller's Web Pages - US Railroads

Union Pacific M-10,000 lightweight diesel train
Exhibited at the 1934 World's Fair, the Union Pacific M 10,000 was the lightweight streamlined diesel express train in North America. It was built of Duralumin, an alloy of 95% aluminium, 3.5% copper, 0.7% magnesium, 0.7% manganese, 0.35% iron and 0.35% silicon. It had a 600 hp Winton 191-A V12 distillate engine. Each of the four axles of the front car, the only powered car, was equipped with a General Electric traction motor. The train was thus diesel-electric, called "oil-electric" in those days. The train was fully articulated, with one set of wheels shared between each car. The livery was armor yellow with leaf brown roof and undersides. After the World's Fair the train went into service between the Kansas City and Salina as the "City of Salina." The limited seating capacity of 116 passengers was something of a drawback, though it succeeded in taking several hours off the journey from Kansas City to Salina. The M-10,000 was withdrawn in 1942 and its Duralumin shell melted down and reused to build aircraft for the war effort.
Maker's photograph of the M-10,000
UPRR advertisement for the "City of Salina" train
Front view of the M-10,000. Image courtesy of the Library of Congress.
Rear view of the M-10,000 train. Image courtesy of the Library of Congress
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