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

Tractors in tandem

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  #1  
Old 5th July 2014, 10:51
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Tractors in tandem

In times past it was not uncommon for heavy freight to be hauled by two class 37 locos.

How would two 37s compare to a single class 66 ?


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Old 5th July 2014, 21:33
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Class 37 power is Maximum: 55,500 lbf (247 kN) with a continuous output of: 35,000 lbf (156 kN) @13.6 mph (22 km/h)


Class 66 power is Maximum: 91,900 lbf (409 kN) at starting with a continuous output of : 58,500 lbf (260 kN) at 15.9 mph (25.6 km/h)


So two class 37's with decent engines and bogies fully maintained will out perform one class 66 on paper

the Class 66 with be more economical on fuel and emissions but the 37's will sound like they are working and look so much more like a real loco should
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Old 11th July 2014, 14:22
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Thanks Gray, I'd prefer to see a pair of 37s myself.

In the same vein, are a pair of 20s better than a single 37 ?
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Old 13th July 2014, 21:01
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I'd put two 20's on par with a 47 as these two classes were the workhorses here in the Notts coalfields.
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