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Title: wrong line working today - Dawlish Post by: old original on April 26, 2012, 20:24:17 Anybody have any info, was on the 1406 from London to Penzance, lost about 15 mins using the eastbound track between Dawlish warren and Teignmouth this afternoon, despite the tide being out.
Title: Re: wrong line working today - Dawlish Post by: Chris from Nailsea on April 26, 2012, 20:38:12 Possibly a result of engineering work to deal with this - from the Metro (http://www.metro.co.uk/news/897301-uk-hit-by-floods-as-april-showers-continue-but-hosepipe-ban-still-stands):
Quote UK hit by floods as April showers continue, but hosepipe ban still stands Flash floods and howling winds closed roads, tore down trees and left travellers stranded as Britain was battered by a wintry washout today - but water companies are adamant that huge swathes of the country are still in drought. Two months^ worth of rainfall fell in just 24 hours while 60mph gales lashed parts of the country. Giant waves poured over sea walls in Torbay, Devon, while rivers in the south-west burst their banks and thousands were told to put flood defences in place and be prepared to evacuate as flood warnings were issued. Holidaymakers were marooned as high winds hit cross-Channel ferries from Portsmouth and Poole and hovercrafts to the Isle of Wight. First Great Western trains were suspended after flooding in Cornwall. ::) Title: Re: wrong line working today - Dawlish Post by: phile on April 26, 2012, 21:27:51 Shown on National Rail Website as problem with lineside equipment at Teignmouth and now cleared.
Title: Re: wrong line working today - Dawlish Post by: devon_metro on April 26, 2012, 21:45:15 Axle counters were damaged on the down line I believe. Doubt Torbay had anything to do with it ::)
Title: Re: wrong line working today - Dawlish Post by: old original on April 27, 2012, 07:00:35 cheers people
Title: Re: wrong line working today - Dawlish Post by: The SprinterMeister on April 29, 2012, 20:12:44 Axle counters were damaged on the down line I believe. Doubt Torbay had anything to do with it ::) Correct. Wires dislodged from Evaluator / Axle Counter heads at two locations. Title: Re: wrong line working today - Dawlish Post by: eightf48544 on April 30, 2012, 12:40:20 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train.
Title: Re: wrong line working today - Dawlish Post by: The SprinterMeister on April 30, 2012, 13:56:15 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train. I think more than one wave may have been involved.;) The evaluator being the small square mushroom shaped thing next to the track not the actual axle counter head fixed to the web of the rail. The kit has been there since about 1991 so might not be quite as robust / weatherproof as it used to be. Title: Re: wrong line working today - Dawlish Post by: SandTEngineer on April 30, 2012, 17:22:01 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train. I think more than one wave may have been involved.;) The evaluator being the small square mushroom shaped thing next to the track not the actual axle counter head fixed to the web of the rail. The kit has been there since about 1991 so might not be quite as robust / weatherproof as it used to be. Not quite right. The trackside equipment in the yellow box is called the 'mushroom'. This processes the information received from the sensors mounted on the rail and sends it to the evaluator. The evaluator is housed elsewhere (for security reasons I won't say where) and contains all of the equipment that analyses the individual sections and processes them for the signalling system to use. The mushroom at Dawlish station has always been the one most prone to damage by strong waves. I'll post up a photo when I can find it. Title: Re: wrong line working today - Dawlish Post by: ellendune on April 30, 2012, 19:21:54 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train. Never underestimate the power of a wave some people have not survived doing so. A wave carrying a rock can be even more deadly. Title: Re: wrong line working today - Dawlish Post by: paul7575 on April 30, 2012, 20:33:19 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train. They don't actually get a 'pounding' from a train though. The axle counting doesn't involve any physical contact, as it's a proximity transducer, it is just detecting the change to the local magnetic field as a wheel flange passes through it. Regarding the yellow boxes though, I'd suggest that mushroom is still just a nickname - if I wanted to order one, I bet the Unipart Rail catalogue wouldn't call them mushrooms, would it? ??? Paul Title: Re: wrong line working today - Dawlish Post by: bobm on April 30, 2012, 20:40:06 Well I've learned something today. I always assumed axle counters used the breaking of a beam of light to work. Shows you should never assume. Thank you!
Title: Re: wrong line working today - Dawlish Post by: SandTEngineer on April 30, 2012, 20:41:36 That was done by a wave? Don't seem to very secure fixings, considering the pounding axle counters get from a train. They don't actually get a 'pounding' from a train though. The axle counting doesn't involve any physical contact, as it's a proximity transducer, it is just detecting the change to the local magnetic field as a wheel flange passes through it. Regarding the yellow boxes though, I'd suggest that mushroom is still just a nickname - if I wanted to order one, I bet the Unipart Rail catalogue wouldn't call them mushrooms, would it? ??? Paul OK then lets talk technical - its an EAK30 and here is the photo.......we did try to protect it at one time :P (http://cbrailways.co.uk/PhotoAlbums/album_1335815694/Dawlish_Axle_Counter_head.JPG) ...and this is how they normally look ;) (http://cbrailways.co.uk/PhotoAlbums/album_1335815694/Axle_Counter_Mushroom.JPG) Title: Re: wrong line working today - Dawlish Post by: bobm on April 30, 2012, 20:59:32 I assume it has to be on the seaward side because there is no room on the, more protected, other side.
Title: Re: wrong line working today - Dawlish Post by: SandTEngineer on April 30, 2012, 21:03:25 I assume it has to be on the seaward side because there is no room on the, more protected, other side. Its because the cable between the mushroom and the detector heads is restricted to fixed lengths with 8m being the current maximum approved length (although 12m is in for approval). Therefore the mushroom is usually in the adjacent cess which as you say in this case is on the seaward (Down) side. Title: Re: wrong line working today - Dawlish Post by: Louis94 on April 30, 2012, 21:18:48 OK then lets talk technical - its an EAK30 and here is the photo.......we did try to protect it at one time :P I noticed on Saturday that this Axle counter was covered up with a black bag, or at least it appeared to be. Title: Re: wrong line working today - Dawlish Post by: TonyK on May 01, 2012, 21:37:53 Quote I noticed on Saturday that this Axle counter was covered up with a black bag, or at least it appeared to be. The cutting edge in protective insulation, I believe. You've got to move with the times. Title: Re: wrong line working today - Dawlish Post by: Chris from Nailsea on May 02, 2012, 00:33:05 McNulty = cost-cutting. ;)
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