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Go Back   Railway Forum > Diesel & Electric > Diesel & Electric Discussion

class 90 in tandem

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  #1  
Old 2nd February 2017, 10:13
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class 90 in tandem

In the gallery is a picture of two class 90s hauling an intermodal.

Why are two needed ?

Is it

A) one is not powerful enough

B) in case one fails

C) using the path to relocate one.

D) none of the above.


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Old 2nd February 2017, 14:46
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A and B I think Philip.
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Old 8th February 2017, 16:52
Bevan Price Bevan Price is offline
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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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