Wheel arrangement


Wheel arrangement

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, depending on the country; also, a same country will typically use a different scheme for steam locomotives on the one hand, and electric and diesel locomotives on the other hand.

In the United States, the United Kingdom and Ireland, the Whyte notation is generally used for steam locomotives. 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.

In mainland Europe, the UIC classification scheme is generally used, with some exceptions. In France, the UIC classification is used for diesels and electrics while a scheme similar to the Whyte notation, but counting axles insteads of wheels, is used for steam locomotives.

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.

Major Notation Schemes

*AAR wheel arrangement - Used largely throughout the US and Canada.
*UIC classification - Used for diesel and electric locomotives in the UK. Used in mainland Europe for all locomotive types, including steam.
*Whyte notation - Used for shunting locomotives and steam locomotives in the UK.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • AAR wheel arrangement — The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. It is essentially a simplification of the European UIC classification, and it is… …   Wikipedia

  • Tri-star (wheel arrangement) — The tri star is a novel wheel design originally by Lockheed in 1967 in which three wheels are arranged in an upright triangle with two on the ground and one above them. If either of the wheels in contact with the ground gets stuck, the whole… …   Wikipedia

  • Wheel of Fortune (video game) — Like Jeopardy! , Wheel of Fortune has had many video games released over the years. Every modern version of Wheel features the likeness of co host Vanna White (and later, the voice of announcer Charlie O Donnell), but not of host Pat Sajak, with… …   Wikipedia

  • WHEEL OF FORTUNE (song) — Infobox Single Name = WHEEL OF FORTUNE (運命の輪) Artist = Eiko Shimamiya from Album = B side = Diorama Released = April 16 2008 Format = Maxi Recorded = Genre = J Pop Length = 21:16 Label = Geneon Writer = Producer = I ve Sound Certification = Chart …   Wikipedia

  • Wheel motor — The wheel motor (also called wheel hub motor, hub motor or in wheel motor ) is an electric motor that is incorporated into a wheel and drives it directly.Uses* Wheel motors are applied in industry, driving e.g. wheels that are part of assembly… …   Wikipedia

  • wheel and axle — a simple machine consisting, in its typical form, of a cylindrical drum to which a wheel concentric with the drum is firmly fastened: ropes are so applied that as one unwinds from the wheel, another rope is wound on to the drum. [1765 75] * * * ▪ …   Universalium

  • Driving wheel — The driving wheels (boxed) on a 4 6 2 locomotive. The four driving wh …   Wikipedia

  • Leading wheel — The leading wheel or leading axle of a steam locomotive is an unpowered wheel or axle located in front of the driving wheels. The axle or axles of the leading wheels are normally located in a truck (or bogie ). Leading wheels are used to help the …   Wikipedia

  • Trailing wheel — On a steam locomotive, a trailing wheel or trailing axle is an unpowered wheel or axle located behind the driving wheels. The axle of the trailing wheels were usually located on a trailing truck.Trailing wheels were used in some early locomotives …   Wikipedia

  • Color wheel — For the circular mechanical device for tinting a light beam (e.g., in a DLP video projector), see color wheel (optics). Boutet s 7 color and 12 color color circles from 1708 …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.