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| Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash (1338200) | |||
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Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash |
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Posted by Broadway Lion on Thu Feb 5 21:49:11 2015, in response to Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash, posted by Fisk Ave Jim on Thu Feb 5 19:20:41 2015. Third rail is not welded. It does not need to be, and that would have made the accident worse.Remember that MN uses the Sprague type third rail. It is an under-running third rail, which means that the ends of a section bend upward so that an approaching shoe is pushed down under the rail. On NYCT and LIRR, the third rail is over-running, the end pieces bend down wards and will lift the shoes up onto the rail. In the vent of an accident the offending object would be lifted up over the rail. On MN an offending object would be pushed down under the rail, and lift the rail up off of its seats. Because the under running rail has an insulated cover over the top of it, this would tend to hold the rail together as it is lifted, albeit that it should be more difficult to lift a Sprague rail up since the brackets want to hold it down. On NYCT and LIRR, the third rail simply sits on the insinuator seats courtesy of gravity. It is more easily dislodged in an accident, with the result that it is pushed aside and out of the way. Leastwise, that is how the LION sees it, your mileage may vary. ROAR |
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