1Co+Co1
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Under the British and Imperial classification scheme of locomotive axle arrangements 1Co+Co1 is a classification code for a locomotive wheel arrangement of two eight-wheeled bogies with an articulated inter-bogie connection, each with three axles powered by a separate traction motor per axle and with the fourth non-powered axle in an integral leading pony truck to reduce the axle load. The similar 1Co-Co1 classification is in the same axle configuration, but without the inter-bogie connection.[1][page needed]
Other equivalent classifications are:
- AAR classification: 1-C+C-1
- UIC classification: (1′Co)+(Co1′)