Locomotive wheel arrangement is how the wheels of the locomotive are arranged by type, position, and connections. There are several notations used to describe wheel arrangements. In the United States and the British Isles, the Whyte notation is generally used for steam locomotives. In mainland Europe, the UIC classification scheme is generally used. British practice uses a slightly simplified form of the UIC notation for diesels and electrics. The United States uses the AAR wheel arrangement scheme for diesels and electrics. This article may contain original research or unverified claims. ... A selection of early 20th century locomotive types according to their Whyte notation and their comparative size The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early 20th century. ... Great Western Railway No. ... World map showing Europe Europe is conventionally considered one of the seven continents of Earth which, in this case, is more a cultural and political distinction than a physiogeographic one. ... The UIC classification is a comprehensive system for describing the wheel arrangement of locomotives. ... The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. ...
Especially in steam days, wheel arrangement was an important attribute of a locomotive, because there were many different ones, each optimised for a different use. Modern diesel and electric locomotives are much more uniform, usually with all axles driven.
In the United States and the British Isles, the Whyte notation is generally used for steam locomotives.
The United States uses the AAR wheelarrangement scheme for diesels and electrics.
Especially in steam days, wheelarrangement was an important attribute of a locomotive, because there were many different ones, each optimised for a different use.
The AAR wheelarrangement system is a method of classifying locomotive (or unit) wheelarrangements that was developed by the Association of American Railroads.
This arrangement also includes locomotives made of two permanently coupled B-B units, such as some EMD FT units which had a solid drawbar connecting two units instead of the typical couplers.
This arrangement was used on the Jawn Henry coal-fired steam-turbine locomotive built by the Baldwin Locomotive Works for the Chesapeake and Ohio Railway in May, 1954.
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