Rail roads and their tracks.

   / Rail roads and their tracks. #3,511  
Not exactly a photo of Railroad tracks, but I picked up a section of rail and some spikes and hardware and made an Anvil.

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   / Rail roads and their tracks. #3,513  
the old grind said:
Lower weight/loading per axle and enough electric motor power from two axle motors per truck. Has been common on diesel passenger locos since way back, often to increase route availability on older lines.
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I'm not sure how far back the arrangement was used, but the EMD E series of locomotives also used A1A-A1A wheel arrangements, as the were basically the power trains of two F series units on one longer chassis. Advancements in the power ratings of traction motors using AC technology has allowed a 4,400HP prime mover power four traction motors.
 
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