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[quote user="BaltACD"] [quote user="Bucyrus"] The news coverage seems to be indicating that the train ran away due to gravity, and not due to being under power from the locomotive.  Does anybody know how much of a grade there is between the point where the train was tied up and the point where it derailed? <div style="clear:both;"></div> [/quote]Article I read stated part of the train 'ran away' - the locomotives and head end of the train were where the train had been 'parked'.  If so it sounds like vandalism coupled with air leaking off the train and the train not having been stopped 'streached' so that tension within the couplings would not permit a uncoupling lever being operated successfully.[/quote]   That is interesting news.  Maybe they stopped with the slack bunched, which would have enabled a pin to be pulled.  If so, the brakes must have been holding in order for the slack to stay bunched.  Then, if a pin were pulled, the perpetrator would have had to have bled all those cars so they would run away.
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