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Ed, That explanation was perfect. For the first time (and I have read a lot of books) I understand how a trains brake system works. I now also understand why there is a delay in getting trains out of a yard. I assumed building a train amounted to simply coupling cars together. Forgot about the brake system. I bet on cold day's testing a brake system could be a real challenge at times. Bet you can tell when they got cars out of storage and brake system has not been used for a while. (sticky brakes) Thanks!!! <br /> TIM A
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