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A Locomotive is a machine used to haul a train. In the 19th century, locomotives were powered by steam. During the 20th century, there was a transition from steam to electric and diesel power.[1]

Diesel locomotives

See also: Diesel engine
Diesel locomotive

Major manufacturers of diesel locomotives in the United States include Electro-Motive Diesel and General Electric.

Electric locomotives

See also: Electric motor

The Pennsylvania Railroad was a major user of electric locomotives until 1949 but then switched to diesels because they were more economical. In Europe, electric locomotives are still widely used.

Steam locomotives

See also: Steam engine
Steam locomotive

In the 21st century, steam locomotives are rarely used in commercial service because of their high operating costs but preserved examples can still be seen on heritage railways.

See also


  1. http://www.etymonline.com/index.php?term=locomotive