Method of classifying locomotive wheel arrangements
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)
This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "AAR wheel arrangement" – news · newspapers · books · scholar · JSTOR(April 2020)
This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations.(February 2014) (Learn how and when to remove this message)
This article cites its sources but does not provide page references. You can help providing page numbers for existing citations.(February 2014) (Learn how and when to remove this message)
(Learn how and when to remove this message)
The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. Essentially a simplification of the European UIC classification, it is widely used in North America to describe diesel and electric locomotives (including third-rail electric locomotives). It is not used for steam locomotives, (except geared steam locomotives, which are instead classified by their model and their number of trucks), which use the Whyte notation instead.
The AAR system counts axles instead of wheels. Letters refer to powered axles, and numbers to unpowered (or idler) axles. "A" refers to one powered axle, "B" to two powered axles in a row, "C" to three powered axles in a row, and "D" to four powered axles in a row. "1" refers to one idler axle, and "2" to two idler axles in a row. A dash ("–") separates trucks or wheel assemblies. A plus sign ("+") refers to articulation, either by connecting bogies with span bolsters or by connecting individual locomotives via solid drawbars instead of couplers.[1]
^Pinkepank, Jerry A. (1973). The second diesel spotter's guide. Milwaukee, WI: Kalmbach Publishing. ISBN 0-89024-026-4.
and 23 Related for: AAR wheel arrangement information
media related to Wheelarrangements. The main notations are the Whyte notation (based on counting the wheels), the AARwheelarrangement notation (based...
Look up Aar or AAR in Wiktionary, the free dictionary. AAR or Aar may refer to: Aar, a river in Switzerland, tributary of the Rhine Aar (Lahn), a tributary...
where the Whyte notation is used), and in North America, where the AARwheelarrangement system (essentially another simplification of the UIC system) is...
movements to improve the seating arrangement for future rail cars. Sixteen cars received a new seating arrangement that included modified handholds and...
Strumming with the rhythm that the drivers made." AARwheelarrangement Boxpok Drive axle Sprocket wheel UIC classification Whyte notation Fowler, George...
operator of this wheelarrangement, it was often nicknamed the Union Pacific type. Other equivalent classifications are: AARwheelarrangement: 2-F-1 UIC classification:...
number of wheels is counted. AARwheelarrangement Steam locomotive components UIC classification of locomotive axle arrangements Whyte notation Alfred W Bruce...
Model designation Build year Total produced AARwheelarrangement Prime mover Power output Image 20-ton Boxcab 1938 5 B Cummins 150 hp (110 kW) 23-ton...
railway station. The wheelarrangement of a locomotive describes how many wheels it has; common methods include the AARwheelarrangement, UIC classification...
GG1 has two such frames back to back, 4-6-0+0-6-4. The related AARwheelarrangement classification is 2-C+C-2. This means one frame mounted upon a set...
Model designation Build year Total produced AARwheelarrangement Prime mover Power output Image ATSF 1 1935 1 B-B Dual Winton 12-201-A 1,800 hp (1,342 kW)...
International Union of Railways (UIC) African Union of Railways (AUR) AARwheelarrangement Association of American Railroads (1988). Born out of necessity...
Subway service), known as BB before 1967 B-B, a classification of AARwheelarrangement of railway locomotives BB (ammunition), ammunition for a BB gun...
Six-wheel leading trucks were not very popular. The Cramptons were built in the 1840s, but it was not until 1939 that the PRR used one on the S1. AAR wheel...
defunct Australian airline C-C, a wheel configuration for diesel and electric locomotive; see AARwheelarrangement A former New York City Subway service...
locomotive is to the left. AARwheelarrangement Swiss locomotive and railcar classification UIC classification Wheelarrangement Colvin, Fred H. (1906)....
National Museum of Transportation in St Louis, Missouri. They had an AARwheelarrangement of 2-C-2, or 2′Co2′ in the UIC classification system — three pairs...
locomotives and have AARwheelarrangement C-C (UIC classification Co′Co′), except for the ES44C4 which uses the AAR A1A-A1A wheelarrangement and the meter-gauge...
Specifications common to all Dash 7 Series four axle models are as follows: AARwheelarrangement: B-B Prime mover: GE 12-cylinder V-type 7FDL12 or 16-cylinder V-type...
specification common to all Dash 9 Series six axle models is the AARwheelarrangement known as C-C This version of the Dash 9 was manufactured between...
the AARwheelarrangement notation by a + sign; thus a locomotive with two span bolsters, each with two two-axle trucks (the most common arrangement) is...
Global Information
