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Slugs

A slug is essentially a locomotive without a prime mover, receiving power for its traction motors via cables from an adjacent locomotive. Typically a slug is built from a former locomotive, with the prime mover replaced with a large concrete or similar weight. Slugs are most effective at slow speeds, where pulling force is needed, such as yard and hump service.

Indiana Harbor Belt PB4   Slug Click image for a choice of 2 photos.

Chicago Rail Photographs collection updated 24 March 2025 at 09:53. Photographs and text copyright © 1998-2000 Harold A. Driscoll, All Rights Reserved. Email address is provided exclusively for personal contact, but emphatically not for use for SPAM net.abuse.