AAR wheel arrangement

AAR wheel arrangement is a system for classifying locomotives used in North America. It is a simplified form of the UIC classification of locomotive axle arrangements.

Examples

A1A-A1A Two bogies or wheel assemblies under the unit. Each bogie has two powered axles and one unpowered axle
B-B Two bogies or wheel assemblies under the unit. Each bogie has two powered axles
C-C Two bogies or wheel assemblies under the unit. Each bogie has three powered axles

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