If I have engines MU'd together and I apply locomotive (independent) brakes, do all the MU's also apply? Or is it just the lead locomotive? I'm talking about American freight engines.
All locos in an MU, assuming the MU-2A valve is set to Trail, will duplicate the lead loco's independent brake. This behavior should (if the game is programmed correctly) also be the case with remote MUs controlled via DP (this is why the lead loco in a DPU should also have the MU2A set to Lead)