...and nothing in the NTSB report on that accident implicates general hot weather and CWR as a contributing factor to the heat kink. Poor maintenance and inspection are the real culprits.
http://www.ntsb.gov/doclib/reports/2004/RAB0405.pdf" onclick="window.open(this.href);return false;
The July 4, 2012 derailment of a coal train in Northbrook, IL
was caused by a heat kink.
http://www.fra.dot.gov/Elib/Document/3272" onclick="window.open(this.href);return false;
This accident is interesting because the consist was operating at a reduced speed (heat restriction) when it derailed.
I have always wondered if the heat restriction is worth it or effective...CSX claims it provides more reaction time for the crew to spot an anomaly and stop (?) but 40 mph is still pretty fast - too fast to spot a defect and stop in time, IMO. Supposedly the speed reduction reduces the loading on the rail to prevent heat kinks also.
http://greatergreaterwashington.org/pos ... eavy-rain/" onclick="window.open(this.href);return false;
Oh well, sorry to hijack this thread into heat kink / speed restriction debate, but my opinion is that the speed restriction is another knee jerk over-reaction to a minimal risk scenario, not to mention that the heat restriction is (in my mind) of dubious value. Just like everything else in this country, we seem to be bent on trying to reduce risk (or give the appearance / perception of reducing risk) to zero.
[stepping off soapbox]
Dave