The SD20-2 was a type of

diesel-electric locomotive A diesel locomotive is a type of railway locomotive in which the power source 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 oldest railroads in North America, oldest railroad in the United States and the first steam engine, steam-operated common carrier. Construction of the line began in 1828, and it operated as B&O from 1830 ...

by rebuilding

EMD SD35 The EMD SD35 is a model of 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 ...

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 (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

EMD 645 The EMD 645 is a family of two-stroke 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-cy ...

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

Cincinnati, Ohio Cincinnati ( ; colloquially nicknamed Cincy) is a city in Hamilton County, Ohio, United States, and its county seat. Settled in 1788, the city is located on the northern side of the confluence of the Licking River (Kentucky), Licking and Ohio Ri ...

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 sma ...

, engineless units with

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, or electric multiple unit trains. Traction (engineering), Traction motors are used in electrically powe ...

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 company operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. Operating about 21,000 route miles () of track, it is the lead ...

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 ...

; #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 can have monetary value, especially recover ...

ped by Cycle Systems of

Roanoke, Virginia Roanoke ( ) is an Independent city (United States), independent city in Virginia, United States. It lies in Southwest Virginia, along the Roanoke River, in the Blue Ridge Mountains, Blue Ridge range of the greater Appalachian Mountains. Roanok ...

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