When did trains become diesel-electric?

In the United States, diesel–electric propulsion was brought to high-speed mainline passenger service in late 1934, largely through the research and development efforts of General Motors dating back to the late 1920s and advances in lightweight car body design by the Budd Company.



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In Britain the Great Western Railway introduced diesel railcars in the 1930s and the first British mainline diesel locomotive was built by the London, Midland and Scottish Railway in 1947 but, unlike elsewhere in the developed world, the transition away from steam was delayed during the early postwar years.

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Ever since the discovery of the dynamo-electric principle by Werner von Siemens in 1866, one had therefore tried to utilize electric motors for transportation purposes. And with success: on May 31, 1879, Siemens & Halske presented the world's first electric train in which power was supplied through the rails.

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Diesel trains are more versatile as they can work on the almost 60% of lines that aren't electrified and the portion that is. Diesel power can also transport exceptionally heavy loads and so is often used in the freight sector.

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Some locomotives collect electricity from overhead cables, while others take power from a third “live” rail on the track. It is very expensive to build the lines or rails that carry the electric current, but electric locomotives are cleaner, quieter, faster, and more reliable than steam or diesel engines.

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Electric locomotives are typically 20% less expensive than diesel locomotives. Maintenance costs can be 25 to 35 percent lower and operating costs can be up to 50%.

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In rail transport, dieselisation refers to the replacement of the steam locomotive or electric locomotive with the diesel locomotive (usually the diesel-electric locomotive), a process which began in the 1930s and is now substantially complete around the world.

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Electric railways began in Great Britain in 1883 and the first EMU ran on the Liverpool Overhead Railway in 1893. In the early 20th century, systems were developed where all the motors on a train could be controlled by a low voltage signal from any cab.

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Diesels can still operate on electrified lines, they simply do not pull power from the overhead wires, instead burning diesel to generate power. There are no clearance problems for diesels to operate on electrified lines.

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No, trains have no gears, since these are unfeasible. That's why their fuel (if any) is converted to electric energy and then used to run motors.

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Railway electrification in Great Britain began in the late 19th century. A range of voltages has been used, employing both overhead lines and conductor rails. The two most common systems are 25 kV AC using overhead lines, and the 750 V DC third rail system used in Southeast England and on Merseyrail.

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Disadvantages of electric traction include: high capital costs that may be uneconomic on lightly trafficked routes, a relative lack of flexibility (since electric trains need third rails or overhead wires), and a vulnerability to power interruptions.

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  • Share of electrification in the rail networks of:
  • Liechtenstein - 100% Armenia - 100% Ethyopia - 100% Luxembourg - 100% Dschibuti - 100%
  • Japan - 73% Montenegro - 89% Germany - 61% EU - 54% Switzerland - 84% Belgium - 85% France - 58% UK - 28% Sweden - 75% China - 65% India - 37% Russia - 51% USA - 0,54% ...
  • Found here:


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Touching a third rail can result in electrocution, so usage of the metaphor in political situations relates to the risk of political suicide that a person would face by raising certain taboo subjects or having points of view that are either censored, shunned or considered highly controversial or offensive to advocate ...

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More than 30% of the UK rail network currently uses a third rail to power the train, commonly in the southeast and in dense urban areas around the country. One of the significant advantages of third rail electrification is its cost-effectiveness.

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