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[quote]QUOTE: Originally posted by jhhtrainsplanes [quote]QUOTE: Originally posted by redflasher From my office window... I see an old BN slug #1701 behind 2 engines traveling back and forth on the Wayzata BNSF line almost everyday from my office window. It doesn't sound like it is operating just being hauled along. [/quote] Hello [:)] Slugs are unpowered and receive their "power" from another engine. The locomotives at low speed produce more electrical power than they themselves can use. The slug uses the extra power to provide traction at low speeds to help start the train moving. Since they don't have an engine themselves they will not produce an engine noise. [/quote]ACTUALLY some do have engines like BNSF ex ATSF & ex BN ther just like regular locos but without cabs and controls like E or F 7-9's B units allthough some like CSX ,CR, & some older UP & SP are just traction motors or road slugs UP KCS MP & CR had yard slugs KCS & UP still use them in hump yards
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