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Post by xtmw on Oct 12, 2022 15:03:45 GMT
I've noticed for the past few days both North and West Acton stations have been having signalling problems? What seems to be the issue? Do they just keep failing or is it something else?
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Post by Dstock7080 on Oct 12, 2022 15:46:28 GMT
nothing reported on other days.
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rincew1nd
Administrator
Junior Under-wizzard of quiz
Posts: 10,286 
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Post by rincew1nd on Oct 12, 2022 22:09:38 GMT
Interesting, especially given that sandite contains an ingredient to aid track circuit activation.
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Tom
Administrator
Signalfel?
Posts: 4,196
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Post by Tom on Oct 13, 2022 17:41:51 GMT
It's not good in blockjoints though!
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Post by jimbo on Oct 13, 2022 19:11:43 GMT
Does Sandite have a metallic component to aid electrical conductivity? So it aids track circuit detection of train wheels on crushed leaf contaminated rails. But it can also provide alternative paths around block joints which can break down the signalling system operation! Is that why the outer Met. has used a system in Autumn to check on consecutive track circuit operation?
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Chris M
Global Moderator
Forum Quizmaster
Always happy to receive quiz ideas and pictures by email or PM
Posts: 19,758
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Post by Chris M on Oct 13, 2022 21:39:47 GMT
Yes, Sandite does have a metallic component - Network Rail describe it as a mixture of sand and antifreeze that also contains steel shot. Sand itself is also a terrible conductor of electricity, so without the steel it would likely make the reliability of train detection even worse! |
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