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| Re: train speed over Manhattan Bridge. (909436) | |||
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Re: train speed over Manhattan Bridge. |
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Posted by SelkirkTMO on Mon Mar 8 20:05:09 2010, in response to Re: train speed over Manhattan Bridge., posted by Concourse Express on Mon Mar 8 20:00:09 2010. I'm sure the grade in Philly is MUCH more gentle. But yeah, folks might not realize that the contact area between a 36 inch or so train wheel and the rail is about the size of a dime. And a little "juice" makes a hell of a lot less friction. And on a downhill, you want all the friction you can get. :) |
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