| You had this apparatus on each end, obviously so that the car would not need to be turned! If the locomotives were on the end I am standing on, the air hose from the car ahead of this car would get hooked into the green "Trainline" hose, and would be open, while the yellow "Compressor" line would be closed. Just the opposite would happen on the other side of this car, where the green "trainline" line would be closed off and the remainder of the train hooked up to the "Compressor" line. |