British Rail Class 55 - Proposed Deltic Locomotives

Proposed Deltic Locomotives

A 72 ton Bo-Bo locomotive, using a single 18 cylinder Deltic engine, was proposed as an alternative to what became the British Rail Class 37 Type 3 locomotive introduced from 1960.

A Co-Co "Super Deltic" was proposed but not built. There were three potential designs between 4000hp and 4600hp weighing between 114 and 119 tons with a maximum axle load of 19 long tons (19 t). The locomotives would have looked very similar to the eventual Class 50s, though slightly longer. All three designs would have had two 18-cylinder turbocharged engines, based on the 9-cylinder turbocharged engine used in the British Rail Class 23 "Baby Deltic" and the locomotive would have been designated Class 51. The Class 55's engines were not turbocharged, although they did have centrifugal scavenging blowers.

Read more about this topic:  British Rail Class 55

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