Affiliate Disclosure: We may receive a commision from some of the links and ads shown on this website (Learn More Here)
I have acquired some of the recent Intermountain HO SD40-2's with the ESU sound decoders. When I have them in consist running as a pair or trio they seem to surge which in turn creates an accordion effect in the train. It does it a lot at slower speeds and I don't notice it as much at higher...
ModelRailroadForums.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com