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The wheel arrangement on large diesel locomotives is described using the UIC classification system. Those in use on the SVR are as follows:
*B-B: Four powered axles all mounted in the locomotive's frame, driven in pairs, i.e. each pair of axles is connected by driving rods or gears.
*Bo-Bo: Four axles in two individual bogies, all driven by their own traction motors.
*C-C: Two bogies or wheel assemblies under the unit. Each bogie has three powered axles, connected by driving rods or gears.
*Co-Co: Two six-wheeled bogies with all axles powered, with a separate motor per axle.
The wheel arrangement on steam locomotives and small diesel locomotives is described using [[Whyte notation]].
==See also==
[[Diesel Locomotives]]
*B-B: Four powered axles all mounted in the locomotive's frame, driven in pairs, i.e. each pair of axles is connected by driving rods or gears.
*Bo-Bo: Four axles in two individual bogies, all driven by their own traction motors.
*C-C: Two bogies or wheel assemblies under the unit. Each bogie has three powered axles, connected by driving rods or gears.
*Co-Co: Two six-wheeled bogies with all axles powered, with a separate motor per axle.
The wheel arrangement on steam locomotives and small diesel locomotives is described using [[Whyte notation]].
==See also==
[[Diesel Locomotives]]
