Metroman62
Member
As I am not very technically minded, I was wondering how multiple engines on trains are controlled to ensure they are all providing power and not being dragged or pshed by another. What I mean by this is when a train is being doubled headed by locomotives, or the various different engines on a multiple unit, how is it ensured that they are providing the correct power to stop the front one pulling the one behind if that is not in sync, or the one behind pushing the one in front if they are out of synce. I can imagine with modern trains there could be a computerised system to monitor such things,but on older units how do all the engines stay in synce so that non are pushign or pulling the others?