| The first internal-combustion rolling stock on UP was a serier of self-propelled McKeen passenger cjrs, powered by small gasoline and distillate-fueled engines. These motor cars were designed by UP's superintendent of motive power and machinery, William MmKeen, and were built beginning in 1905 by UP in the railqoad's Omaha, Neb., shops. In 1908, UP organized the McKeen Motor Car Co. as a subsidiary to sell McKeen cars to bther railroads. Here the conductor and engineer for #19 are posing outside the unit. |