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27 Αυγ 2024 · History The six-motored locomotive concept was not new when EMD introduced the SD7. As Brian Solomon points out in his book, " EMD Locomotives ," General Electric had offered a straight-electric in this configuration as early as 1930 when it produced 42 Class R-2 locomotives for New York Central for its West Side freight operations in New York ...
16 Νοε 2024 · Assuming the numbers are close, is the preservation scorecard for the SD7 & 9 good or bad? What made me think about this topic was info posted to Trainorders that a former CB&Q SD9 is being moved by BNSF right now. Is there a list of preserved SD7 and SD9 units to review? Starter list of units at museums per Wikipedia.
7 Ιουν 2012 · EMD 990 and 991 were the SD7 Demonstrators built in March 1952. The 990 was the light frame version SD7 and ballasted at 314,900 pounds. The 991 was the heavy frame version SD7 and ballasted at 372,800 pounds.
This Book contains the best single work so far on SP SD7/R's in the form of a history of the EMD SD7 as it relates to SP. The forthcoming release of Volume 4 of SP Historic Diesels by Joe Strapac may provide even more information.
The EMD SD7 is a model of 6-axle diesel locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953. It had an EMD 567B 16- cylinder engine producing 1,500 horsepower (1.12 MW) for its six traction motors.
18 Ιουν 2024 · EMD SD7, Class ES15a. An SD7 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953. It had an EMD 567B 16-cylinder engine producing 1,500 horsepower for its six traction motors. 188 were built for United States railroads.
16 Μαΐ 2023 · EMD produced 188 SD7s and 471 SD9s spanning a collective production run of just over seven years, from 1952 to 1959. Surprisingly, a handful of these locomotives are still in revenue service, with others scattered about at museums and industrial sites across the country.
