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| Re: CBC news, new Acela trains, first look (1515764) | |||
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Re: CBC news, new Acela trains, first look |
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Posted by WillD on Fri Jun 14 18:05:36 2019, in response to Re: CBC news, new Acela trains, first look, posted by Joe V on Thu Jun 13 03:52:48 2019. The issue would be how long the 3rd rail shoes would last and the impact of their wear on the 3rd rail itself. You can run at 100+mph, but you're going to chew through those shoes, especially when in wet or icy conditions. Inspections would become vital as there'd always be the possibility of a shoe becoming worn to the point where the sacrificial element is eroded resulting in the bracket for the 3rd rail shoe becoming the point of electrical contact and damaging the 3rd rail itself. Alignment of the 3rd rail may be simple at the 50-ish miles per hour NYCT plods along at, but at anything above 80 there's a very real possibility of a misaligned approach shearing the shoes off one side of a train. |
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