The SD20-2 was a type of

diesel-electric locomotive A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving whee ...

created in 1979/1980 by the

Baltimore and Ohio Railroad The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States, with its first section opening in 1830. Merchants from Baltimore, which had benefited to some extent from the construction of ...

by rebuilding

EMD SD35 An EMD SD35 is a 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between June 1964 and January 1966. Power was provided by an EMD 567D3A, 16- cylinder engine which generated . A fuel tank was used on this unit ...

locomotives. Five of the B&O's SD35 fleet were rebuilt at their Cumberland Yard by fitting a non-

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

EMD 645 The EMD 645 is a family of diesel engines that was designed and manufactured by the Electro-Motive Division of General Motors. While the 645 series was intended primarily for locomotive, marine and stationary engine use, one 16-cylinder ver ...

engine and upgraded electrical systems. They were placed in service at the B&O Queensgate Yard in

Cincinnati, Ohio Cincinnati ( ) is a city in the U.S. state of Ohio and the county seat of Hamilton County. Settled in 1788, the city is located at the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state lin ...

attached to

slugs Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc. The word ''slug'' is also often used as part of the common name of any gastropod mollusc that has no shell, a very reduced shell, or only a sm ...

, engineless units with

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles ( electric multipl ...

s that draw their power from the "mother" unit. With the B&O, the SD20-2s were numbered #7700–7704. At some point, #7700 and #7702 swapped numbers. All of them passed to

CSX Transportation CSX Transportation , known colloquially as simply CSX, is a Class I freight railroad operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. The railroad operates approximately 21,000 route miles () of track. ...

as #2400-2404, but are now withdrawn from CSX service. One of the units, #2401, went on to the

Ohio Central Railroad System The Ohio Central Railroad System is a network of ten short line railroads operating in Ohio and western Pennsylvania. It is owned by Genesee & Wyoming Headquartered in Coshocton, Ohio, the system operates of track divided among 10 subsidiary r ...

; #2401 was in turn resold to the

Pacific Harbor Line The Pacific Harbor Line was formed in 1998 to take over the Harbor Belt Line (HBL). In 1998, the Alameda Corridor was nearing completion, allowing for a massive amount of railroad traffic from the largest harbors in the Western hemisphere: Po ...

and reassigned road #45 (pictured at right). #2404 was

scrap Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap has monetary value, especially recovered m ...

ped by

Cycle Systems Cycle, cycles, or cyclic may refer to: Anthropology and social sciences * Cyclic history, a theory of history * Cyclical theory, a theory of American political history associated with Arthur Schlesinger, Sr. * Social cycle, various cycles in soc ...

Roanoke, Virginia Roanoke ( ) is an independent city in the U.S. state of Virginia. At the 2020 census, the population was 100,011, making it the 8th most populous city in the Commonwealth of Virginia and the largest city in Virginia west of Richmond. It is ...

in August 2006.

References

External links

The History of EMD Diesel Engines
at th
Pacific Southwest Railway
official website. {{DEFAULTSORT:Sd20-2 Baltimore and Ohio Railroad C-C locomotives Standard gauge locomotives of the United States Railway locomotives introduced in 1979

See also

References

External links