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Re: This afternoon at Covent Gardens

Posted by Express Rider on Fri Nov 9 00:22:53 2018, in response to Re: This afternoon at Covent Gardens, posted by Spider-Pig on Thu Nov 8 22:37:00 2018.

I'm sure I must have read details about the fourth rail system somewhere, but don't remember the principle of it (besides the fourth being a separate negative return rail), how it was developed and why London's existing system(s) adopted it in the beginning.

Isle of Wight uses a traditional third rail system. When tube trains were sent there (Standard & later 1938 stock) their electrical systems had to be converted to third rail operation.

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