page_title: Co-Bo
section_title: Diesel
hierarchical_section_title: Co-Bo / Examples / Diesel
caption_attribution_description: English: Diesel-hauled Up express approaching Leyland. View northward, towards Preston etc., West Coast Main Line. Dieselisation is creeping in - albeit with an unsatisfactory Type 2 1,200hp Metro.-Vickers Co-Bo, No. D5705. Its train is the Summer Saturdays 13.03 Workington - Manchester Victoria.
context_page_description: Co-Bo or Co′Bo′ is a wheel arrangement in the UIC classification system for railway locomotives. It features two uncoupled bogies. The "Co" bogie has three driven axles and the "Bo" bogie has two.
  The arrangement has been used to even out axle loading. The weight distribution of the locomotive depends on the power unit, the engine and generator. If these are not placed symmetrically, the weight distribution is also biased to one end. Placing three axles beneath the engine end and just two beneath the other, with the lighter ancillaries, gives more even loading per-axle.
context_section_description: The British Railways Class 28 is the first (and only) UK locomotive with a Co-Bo wheel arrangement.
caption: British Railways Class 28
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