The EMD F7 is a 1,500 horsepower diesel-electric locomotive built for North American rail service between February 1949 and December 1953 by the Electro-Motive Division of General Motors and, in Canada, by General Motors Diesel; it used a 16-cylinder two-stroke diesel engine with a Roots blower, weighed about 247,300 pounds and could run 65 to 102 miles per hour. A total of 2,393 A units and 1,463 B units were built, more F7s than all other F-unit models combined, making it by far the best-selling cab unit design of all time. Though marketed mainly for freight, the F7 proved versatile enough to pull prestigious passenger trains such as the Santa Fe Railway's Super Chief and El Capitan, and its reliability and economy of operation made it a dominant force on American railroads through the middle of the twentieth century.
Facts
YearMarks the start of F7 production in February 1949; production continued to December 1953. SignificanceThe F7 was the best-selling cab unit of all time in EMD's F-unit line, with more F7s built than every other F-unit model combined, and it helped complete the dieselization of American freight and passenger railroading. 1 Manufacturer or BuilderBuilt by the Electro-Motive Division of General Motors (EMD) at La Grange, Illinois, and by General Motors Diesel (GMD) at London, Ontario. 1 FAQs
Why was there no EMD F4, F5 or F6 before the F7?
The 7 was chosen to match the E7 and the new GP7.
EMD skipped those numbers on purpose. The 7 was chosen to match the contemporary twin-engine E7, and the same number was also applied to the new GP7 road-switcher.
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Sources
1. Wikipedia: EMD F7
WikipediaIntroduction section
The EMD F7 is a model of 1,500-horsepower (1,100 kW) diesel-electric locomotive produced between February 1949 and December 1953 by the Electro-Motive Division of General Motors (EMD) and General Motors Diesel (GMD).
History section
The F7 was the fourth model in GM-EMD's successful line of F-unit locomotives, and by far the best-selling cab unit of all time. In fact, more F7s were built than all other F-units combined.
In Group: American Diesel-Electric Road Locomotives, Lead sentence
The EMD F7 is a model of 1,500-horsepower (1,100 kW) diesel-electric locomotive produced between February 1949 and December 1953 by the Electro-Motive Division of General Motors (EMD) and General Motors Diesel (GMD).
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