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A kinky subject....
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<p>[quote user="Murphy Siding"]That sounds like there is probably no way to check for sunkinks, other than visually? Even that sounds like it could only catch a percentage of the problems. How prevalent are they, and why does it seem like the only ones that make news are on CSX rails?[/quote]</p><p>Prevention is easier than after-the-fact detection. Prevention methods are:</p><p>1. Not decreasing neutral temperature in the process of rail changeout, e.g, such as cutting out a defect in the rail and inserting a stick of rail longer than what came out, and welding it all back together.</p><p>2. Maintaining proper anchor patterns, and snug anchors, not some worn out anchors that don't actually grab the rail, in wood tie territory.</p><p>3. Maintaining proper ballast section, particularly ballast beyond the ends of ties to the full height of the tie.</p><p>4. Maintaining proper subgrade and drainage; maintaining ties in good condition.</p><p>5. Performing proper periodic inspections to look for rail or track "running." </p><p>6. Laying the rail at the proper neutral temperature to begin with.</p><p>Do this and sun kinks should occur rarely. When in doubt, on hot days, issue "heat orders" decreasing maximum authorized train speed (a common practice), and inspect more frequently.</p><p>There has been research toward developing a method of measuring rail compression. This would not detect a sun kink per se, but the conditions that might lead to a sun kink.</p><p>S. Hadid </p>
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