Statkowski wrote:Had two derailments in Cherry Tree, Pa. on the RJ Corman Pennsylvania Line involving the bottom of a grade combined with a curve at the bottom. They figured it was too much weight coming down the 0.8% grade putting too much stress on the outside rail of the 14-degree curve at the bottom. Speed was not a factor. Outside rail laid down on its side from the lateral stress, 13 loaded cars ended on the ground. Ever since they reduced the train length there hasn't been a problem since.Before I retired in December 2016, Q388's had been operated at the MAXIMUM tonnage CSX power rules permitted for both head end power and rear end helper power - that figure is nominally 17K tons over Sand Patch. Several times Q388's that had been built to 20K tons from Willard had to be reduced at Connellsville to get within the allowed maximum tonnage.
Fortunately I retired before EHH's 'definition' damaged the existing and fluid state of precision railroading.
Never too old to have a happy childhood!