I can't even image being behind the throttle of a 231 car train.

What Clavalin and FMB said, I can imagine a train like that between the city south of the lake and the Fort because that's pretty flat and not much to interfere but not on the side Cy worked mostly. As for that PTC, I'd hope if I did what it said, what can they say? Can they? Good to not have to be concerned about it!!!!!!!!!!!

The Krink wrote:

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The TO post on this derailment is worth a read. Down at the bottom a NS engineer is claiming the DPU's have some shortfalls.
Especially when the front of the train has to stop suddenly. Suggest some more study/research on DPU's. Reading about derailments
since the everyday use of DPU's and its pretty easy to tell the DPU's just dint respond in time and adding to the severity of the derailment.
MIR at work.

 

NS derailment in New Castle, PA

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 He's wrong about one thing.  When they lose their signal they keep doing whatever they were doing.  They even told us if they lose comm just be patient.  The real problem is when they are in dynamic, and something happens to cause the lead to go idle "ruh roh!!", but after a while you learn to never use dynamic on the DP.

One thing I notice is you rarely see more than one unit in DP.  In the beginning it was always 2x2, now it's 2x1 or 1x1. 

2x1 on a 130 car train with the DP on the rear is perfect, but I guess throwing another 100cars behind the DP makes more financial sense