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| Re: CSX crossing in Darby, PA (513032) | |||
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Re: CSX crossing in Darby, PA |
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Posted by TransitChuckG on Tue Nov 6 19:03:22 2007, in response to Re: CSX crossing in Darby, PA, posted by SelkirkTMO on Tue Nov 6 06:32:53 2007. Some more information from Philly Traction.The track being described is fully within traditional RR/trolley crossing construction. Streetcar wheels ride across the head of the RR rail on their flanges. Eventually there will be a groove made by the repeated passing of the streetcars. What is the problem? The best special work construction practice is to have ramped grooves at frogs and switch mates to eliminate hammering. If the wheel treads had full contact with each break in the rail the cacophony would and is deafening. Flange bearing special work is standard for streetcars. Now what is wrong with doing the same on a railroad crossing? Perhaps I am missing something here. Are the frogs built up or castings? |
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