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[quote user="edbenton"] Think of those water tanks as a tanker trailer used everyday going down the road.  Just because you go thru that corner everyday at that speed with that load and never have an issuse does not mean SOONER OR LATER IT WILL NOT BITE YOU IN THE BUTT.  Take it from someone that pulled tankers and you RESPECT THEM 100% OF THE TIME OR YOU WILL BE ON YOUR SIDE.  All it takes is that liquid to get going and your DONE and on your side.  The problems with the SDF40P's happened when they were coupled back to back and then the water tanks were closer to each other causing more surge in them at the same time.  When that happened you could get and occislation going that nothing would be able to stop.[/quote]  That brings up an interesting point, regarding the orientation of the diesels in a passenger consist.  More often than not, I see Amtrak locomotives facing the same direction.  That would seem to make the most sense in-case they had some type of failure in the lead engine, they could swap positions without having to wye or turntable the secondary.  An Amtrak conductor once told me that is the preferred arrangement. However, I have seen Genesis engines on the Empire Builder arranged back-to-back on several occasions.  Why would the railroad go with such an arrangement?  Perhaps they figure a P42DC hasn't sufficient pulling power anyway to haul a 14-car train plus a deadhead locomotive?  Surely this wouldn't have been the case with the SDP40F's? I'm surprised the SDP40F's were arranged that way especially with the location of the water reservoirs.
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