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Old 10-08-2010, 01:37 PM   #4
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Location: The City Below Vaughan
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Originally Posted by trainmaster_1 View Post
They are called slugs, or as CN calls them YBU-4 (Yard Booster Unit). They provide additional tractive effort (and stopping effort) at low speeds where they are best at since high horsepower isn't a big concern, the GP9RM/Slugs sets are rated for 10,000 tons on dry rail when we use them for pull down and industrial assignments at MacMillan Yard.
Com'on Michael, CN rates everything for at least 10,000 tons
Mike Lockwood

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