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What is meant by the term Co-Co Locomotive ?
The term "Co-Co" refers to a specific wheel arrangement used in locomotives. In this arrangement, each Locomotive has two bogies, each in turn having three axles, with each axle powered by its own electric or diesel motor. The term "Co-Co" comes from the UIC classification used to describe this arrangement, where "C" represents three consecutive pairs of driving wheels and "o" indicates that each axle is driven by its own dedicated traction motor.
Co-Co locomotives are commonly used in heavy freight and mainline services due to their high tractive effort and ability to distribute weight evenly over the wheels. This arrangement provides good traction and allows for efficient power delivery to the tracks, making them suitable for hauling heavy loads over long distances.
One example of a Co-Co locomotive is the British Rail Class 47, which was widely used in the UK for both passenger and freight services. This locomotive had a Co-Co wheel arrangement and was powered by a diesel engine. It was a familiar sight on the British railway network for many years.
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