CPM500 Appears that the P40's have Wabtec 30CW (straight pneumatic)-while the P42's have Knorr CCB (computer controlled brake).
Appears that the P40's have Wabtec 30CW (straight pneumatic)-while the P42's have Knorr CCB (computer controlled brake).
There is no difference in braking performance nor how the braking signal gets to the train. The difference is that all the logic and timing are done by a computer with the Knorr system vs. air valves and reserviors for the WABTEC.
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
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