page_title: British Rail Class 33
section_title: Preservation
hierarchical_section_title: British Rail Class 33 / Preservation
caption_attribution_description: English: British Railways Class 33 D6501 runs round the train at Buckfastleigh on the South Devon Railway
context_page_description: The British Rail Class 33, also known as the BRCW Type 3 or Crompton, is a class of Bo-Bo diesel-electric locomotives, ordered in 1957 and built for the Southern Region of British Railways between 1960 and 1962.
  They were produced as a more powerful Type 3 development of the 1,160 bhp Type 2 Class 26. This was achieved, quite simply, by removing the steam heating boiler and fitting a larger 8 cylinder 8LDA28 version of the previous 6 cylinder engine. This was possible because of the traffic requirements of the Southern Region: locomotive-hauled passenger traffic depended on seasonal tourist traffic and was heavier in the summer, when carriage heating was not needed. In the winter, their expected use was to be for freight. Thus, they became the most powerful BR Bo-Bo diesel locomotive. The perennially unreliable steam heating boiler could also be avoided.
  A total of 98 were built by the Birmingham Railway Carriage and Wagon Company and they were known as "Cromptons" after the Crompton Parkinson electrical equipment installed in them.
  Like their lower-powered BRCW sisters, the 26 and 27 classes, their bodywork and cab ends were of all steel construction.
context_section_description: Twenty-nine locomotives have been preserved.
caption: Preserved Class 33 D6501 runs round the train at Buckfastleigh on the South Devon Railway.
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