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Re: Major Amtrak derailment in Philly

Posted by AlM on Wed May 13 01:09:39 2015, in response to Re: Major Amtrak derailment in Philly, posted by SelkirkTMO on Wed May 13 00:25:28 2015.

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The radius of that curve looks like it's about 1,000 feet. So obviously one possibility is excessive speed. But there's no intrinsic reason it couldn't be a track defect (other than that there aren't supposed to be track defects), is there? Trains put much more sideways force onto the track on a curve than on a straight stretch unless the curve is perfectly banked for the speed.

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