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Post by programmes1 on Jun 30, 2013 9:51:49 GMT
Can anyone help I can not find anything on the reversing of trains over the cross over. When trains are running through normal without reversing are the signals associated with the speed control working normally or are the aspects out, the signals in question being; A1000 actually between the SB & NB on crossover-is the red aspect normally alight? A9000 North of station on NB Do these work normally until a train reverse's SB-NB and then the speed control part is actvated? A9001 North of station on NB A9002 North of station on NB  |
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rincew1nd
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Post by rincew1nd on Jun 30, 2013 10:13:14 GMT
I only know a little about LU signalling, but I suspect it's the same as on other railways where aspects that are "out" are classed as danger signals.
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Post by Dstock7080 on Jun 30, 2013 11:23:47 GMT
I only know a little about LU signalling, but I suspect it's the same as on other railways where aspects that are "out" are classed as danger signals. In this instance Acton Town S5 means suppressed - signals which are deliberately extinguished to avoid drivers being distracted during unusual moves - examples being: Mansion House EB to bay, Tower Hill EB to bay. |
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mrfs42
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Post by mrfs42 on Jun 30, 2013 11:29:13 GMT
Can anyone help I can not find anything on the reversing of trains over the cross over. When trains are running through normal without reversing are the signals associated with the speed control working normally or are the aspects out, the signals in question being; A1000 actually between the SB & NB on crossover-is the red aspect normally alight? Unless something has changed recently the red is normally out until BP 10 clears - I've seen that myself. I think also that keyswitch 'out' will illuminate it too. A9000 North of station on NB Do these work normally until a train reverse's SB-NB and then the speed control part is actvated? A9001 North of station on NB A9002 North of station on NB OK... AFAIK, BP 9 clears straight to green when 7 B normal, with 7 B reverse it'll clear to Y with the PD activated on the crossover. A9000 steps to Y with 7 B reverse and the PD near 7 B points picked, similar for A9001 but PD picked near A9000 and likewise with A9002 but PD picked between A9001/A9002. All these seem to only step to Y when 7 A/B reverse: so when the crossover is normal, they clear normally - from my notes the speed signals need to have the signal in advance at red to step R - Y but this doesn't apply when stepping R - G with 7s normal. Does that help? I think that there was an article in the UN about it a few years back after the third oowhoopscrunch. |
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Post by programmes1 on Jun 30, 2013 11:40:15 GMT
I only know a little about LU signalling, but I suspect it's the same as on other railways where aspects that are "out" are classed as danger signals. In this instance Acton Town S5 means suppressed - signals which are deliberately extinguished to avoid drivers being distracted during unusual moves - examples being: Mansion House EB to bay, Tower Hill EB to bay. Dstock7080 many thanks I should have said suppressed it was a bit too early I went to mass last night and it was a late one. |
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Post by programmes1 on Jun 30, 2013 11:42:16 GMT
Can anyone help I can not find anything on the reversing of trains over the cross over. When trains are running through normal without reversing are the signals associated with the speed control working normally or are the aspects out, the signals in question being; A1000 actually between the SB & NB on crossover-is the red aspect normally alight? Unless something has changed recently the red is normally out until BP 10 clears - I've seen that myself. I think also that keyswitch 'out' will illuminate it too. A9000 North of station on NB Do these work normally until a train reverse's SB-NB and then the speed control part is actvated? A9001 North of station on NB A9002 North of station on NB OK... AFAIK, BP 9 clears straight to green when 7 B normal, with 7 B reverse it'll clear to Y with the PD activated on the crossover. A9000 steps to Y with 7 B reverse and the PD near 7 B points picked, similar for A9001 but PD picked near A9000 and likewise with A9002 but PD picked between A9001/A9002. All these seem to only step to Y when 7 A/B reverse: so when the crossover is normal, they clear normally - from my notes the speed signals need to have the signal in advance at red to step R - Y but this doesn't apply when stepping R - G with 7s normal. Does that help? I think that there was an article in the UN about it a few years back after the third oowhoopscrunch. MRFS thanks as there was no YP on this also thanks for the mention of the article in UN. |
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Tom
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Post by Tom on Jun 30, 2013 18:44:04 GMT
It was after the era of Yellow Perils, thankfully it was before the era where they started to cease doing TC Entries.
As it happens, when compiling the TC entry a design error was noticed that BP9 remained a two aspect signal with all the others also able to display a yellow aspect, giving an aspect sequence Y-Y-G-Y-Y-Y-G. That was hurriedly fixed prior to commissioning!
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rincew1nd
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Post by rincew1nd on Jun 30, 2013 19:17:09 GMT
In this instance Acton Town S5 means suppressed - signals which are deliberately extinguished to avoid drivers being distracted during unusual moves - examples being: Mansion House EB to bay, Tower Hill EB to bay. Ahhh, so these are signals not on the route for the train, but a similar route nearby? |
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mrfs42
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Post by mrfs42 on Jul 1, 2013 7:22:21 GMT
In this instance Acton Town S5 means suppressed - signals which are deliberately extinguished to avoid drivers being distracted during unusual moves - examples being: Mansion House EB to bay, Tower Hill EB to bay. Ahhh, so these are signals not on the route for the train, but a similar route nearby? Yes. Usually done to prevent a "read through" - long chain of green and in the distance is a red. As soon as the red is seen then on go the anchors. There's a good view of this in the old Central Line cab view. |
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Post by programmes1 on Jul 1, 2013 15:40:46 GMT
It was after the era of Yellow Perils, thankfully it was before the era where they started to cease doing TC Entries. As it happens, when compiling the TC entry a design error was noticed that BP9 remained a two aspect signal with all the others also able to display a yellow aspect, giving an aspect sequence Y-Y-G-Y-Y-Y-G. That was hurriedly fixed prior to commissioning! They seem to have stopped doing YPs although there have been some T5 being just one. If the signalling had been like you say Tom with those aspects the T/Ops would not have been to happy. I don't suppose anyone has the TC for the alterations that they could share with us? |
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Tom
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Post by Tom on Jul 1, 2013 21:07:46 GMT
I might be able to lay my hands on the wording used, if not the TC itself. The mods went in during October 2000, I remember it wasn't long after I started.
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Post by programmes1 on Jul 2, 2013 11:29:00 GMT
I might be able to lay my hands on the wording used, if not the TC itself. The mods went in during October 2000, I remember it wasn't long after I started. Tom, If you could that would be most helpful. |
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Post by S&E on Jul 6, 2013 3:23:31 GMT
I might be able to lay my hands on the wording used, if not the TC itself. The mods went in during October 2000, I remember it wasn't long after I started. It was brought into service over the weekend of 4th & 5th Nov' 2000. I have the paperwork for it in my Log-book archive. |
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Post by programmes1 on Jul 7, 2013 10:08:55 GMT
I might be able to lay my hands on the wording used, if not the TC itself. The mods went in during October 2000, I remember it wasn't long after I started. It was brought into service over the weekend of 4th & 5th Nov' 2000. I have the paperwork for it in my Log-book archive. If it's possible can we see the paper work? |
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Deleted
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Post by Deleted on Jul 8, 2013 22:53:22 GMT
If it's any help, my Drivers paperwork from back then says ' Signal A1000 is speed controlled to a yellow aspect following the occupation of Track Circuit 'MB' for a minimum of 6.5 seconds. Signals BP9, A9000, A9001 and A9002 are speed controlled to a yellow aspect a minimum of 5 seconds after the operation of a Position Detector located 25 metres before each signal.' This document is dated 27th November 2002. As has been stated above A1000 is normally suppressed (no aspect) and, if reversing, will remain at danger on approach until the correct speed (just under 5mph) is attained. FYI in normal running BP9 and the 9000's will clear through yellow, albeit very quickly, to a green.
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Post by S&E on Jul 9, 2013 23:13:08 GMT
It was brought into service over the weekend of 4th & 5th Nov' 2000. I have the paperwork for it in my Log-book archive. If it's possible can we see the paper work? No problem. Next time I speak to Tom, I'll give it to him to pass it on. |
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Post by programmes1 on Jul 10, 2013 10:03:32 GMT
If it's any help, my Drivers paperwork from back then says ' Signal A1000 is speed controlled to a yellow aspect following the occupation of Track Circuit 'MB' for a minimum of 6.5 seconds. Signals BP9, A9000, A9001 and A9002 are speed controlled to a yellow aspect a minimum of 5 seconds after the operation of a Position Detector located 25 metres before each signal.' This document is dated 27th November 2002. As has been stated above A1000 is normally suppressed (no aspect) and, if reversing, will remain at danger on approach until the correct speed (just under 5mph) is attained. FYI in normal running BP9 and the 9000's will clear through yellow, albeit very quickly, to a green. Binsey, Thanks a lot. |
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Post by programmes1 on Jul 10, 2013 10:04:00 GMT
If it's possible can we see the paper work? No problem. Next time I speak to Tom, I'll give it to him to pass it on. Okay thanks |
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Deleted
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Post by Deleted on Jul 18, 2013 22:11:49 GMT
You're welcome Acton Town SS!
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