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Post by uzairjubilee on Aug 1, 2008 11:35:13 GMT
Hi all,
At Parsons Green, where the points are, why is there white paint on the edge of the fourth rail (I think that is the one in the middle) where there are rail gaps.
Also, why are there zig-zag lines on some of the track in the Parsons Green area?
Thanks
Uzair
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Colin
Advisor
My preserved fire engine!
Posts: 11,313
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Post by Colin on Aug 1, 2008 11:51:27 GMT
At Parsons Green, where the points are, why is there white paint on the edge of the fourth rail (I think that is the one in the middle) where there are rail gaps. You'll find this in almost every depot & siding on LU!! The ends of all the traction Current rail sections are painted white so that anyone on foot in the area can clearly see them - at least that's why I've always thought they were so treated. Also, why are there zig-zag lines on some of the track in the Parsons Green area? Again, this is present all over LU - the 'zig zag' lines are metal welded to the rail head and has two purposes. The main purpose is to assist the track circuits on parts of track that are lightly used; the second purpose is that it causes the train to vibrate as it passes over.....offering a reminder to the driver that he must go slow. |
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Post by astock5000 on Aug 1, 2008 13:24:14 GMT
Again, this is present all over LU - the 'zig zag' lines are metal welded to the rail head and has two purposes. The main purpose is to assist the track circuits on parts of track that are lightly used; the second purpose is that it causes the train to vibrate as it passes over.....offering a reminder to the driver that he must go slow.[/quote]
There is something like that at Euston (mainline station, not LU) in the platforms, just before the buffers.
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Post by 21146 on Aug 1, 2008 14:16:31 GMT
I never thought the "roaring" noise when passing over couragated rail heads was intentional but it certainly encouraged me to slow down entering Barking Sidings.
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Deleted
Deleted Member
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Post by Deleted on Aug 1, 2008 16:37:25 GMT
it is purely there to assist the track circuit as a rusty rail will not shunt (drop) the track relay properly i think the juddering when riding over them is just a by product
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
Posts: 5,922
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Post by mrfs42 on Aug 1, 2008 18:27:55 GMT
I never thought the "roaring" noise when passing over couragated rail heads was intentional but it certainly encouraged me to slow down entering Barking Sidings. 'Wiggly wire' zig-zags are used for that very purpose on LU; albeit secondarily to them being used as ensuring that the track relay is shunted. I'm sure that most of the zig-zags these days use a rust-resistant alloy to maintain track circuit conductivity. On NR the purpose is just to ensure that the tracks drop - especially on the approach to an infrquently used barrier level crossing |
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Post by ribaric on Oct 4, 2008 22:29:22 GMT
Is also my understanding.
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