Thread: class 90 in tandem
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Old 8th February 2017, 15:52
Bevan Price Bevan Price is offline
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Join Date: Apr 2011
Location: St. Helens
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It is usually because a single loco (with Bo-Bo wheel arrangement) can have adhesion problems with heavy loads on steep gradients. Freightliner often uses pairs of Class 86 for the same reason.
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