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Electro-Motive Corporation (later Electro-Motive Division, General Motors) produced five 1800 hp B-B experimental passenger train-hauling Diesel locomotives in 1935; two company-owned demonstrators, #511 and #512, the Baltimore and Ohio Railroad's #50, and two units for the Atchison, Topeka and Santa Fe Railway, Diesel Locomotive #1. In addition, two single power cars and two twin-unit power cars for the Chicago, Burlington and Quincy Railroad's Zephyr streamliners were built to fundamentally the same design, but clad in Budd Company streamlined stainless steel carbodies. These were #9904 ''Pegasus'' and #9905 ''Zephyrus'' for the ''Twin Zephyrs'', and #9906A/B ''Silver King''/''Silver Queen'' and #9907A/B ''Silver Knight''/''Silver Princess'' for the ''Denver Zephyrs''. All were the mechanical ancestors to EMD's successful E-units, with identical pairs of Winton 201-A Diesel engines, although they ran on AAR type B two-axle trucks instead of the A1A trucks of E-units. When delivered, the units were fitted with shrouding around their trucks, but this did not last long. The boxy carbodies of all but the Zephyrs were the work of GE's Erie, Pennsylvania works, EMD having not yet developed the ability to produce their own bodywork. Like most boxcabs, they had control cabs at both ends, a feature that would only rarely be repeated in future North American locomotives, although it would become common elsewhere. ==EMC demonstrators 511 and 512== The two EMC demonstrators, numbered 511 and 512, were built in May 1935 to demonstrate the future of passenger Diesel power to potential customers. The boxy bodywork was not what EMC intended to sell, but it was an easy way to demonstrate the power units and hauling capacity, which would not be changed in the future E-units. They were demonstrated both together and singly; the latter for shorter trains for local and less busy services, the former to replace larger steam locomotives on busy trains. EMC #512, painted silver, served as ''Unit C'' of ATSF locomotive #1, and helped pull the first regular run of the streamlined, Budd-built ''Super Chief'' on May 18, 1937. In 1938, having outlived their usefulness, the two demonstrators were scrapped. Trucks and some other components were re-used for the two NW4 switchers built for the Missouri Pacific Railroad. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electro-Motive Corporation (later Electro-Motive Division, General Motors) produced five 1800 hp B-B experimental passenger train-hauling Diesel locomotives in 1935; two company-owned demonstrators, 」の詳細全文を読む スポンサード リンク
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