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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.

ExamplesEdit

  • 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