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Post by Deleted on Oct 4, 2013 20:03:31 GMT
 Has anyone else noticed the S-Stock stop boards appearing on the Piccadilly Line Platforms recently. I always wondered how the S-Stock can fit down the Piccadilly Line's Loading Gauges?? This one was spotted at Hammersmith Piccadilly Line Eastbound platform at the end of September - is there an impending re-signalling of the Piccadilly Line forthcoming perhaps?? |
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Post by Deleted on Oct 4, 2013 20:10:02 GMT
SSL stock are able to run on the Piccadilly line tracks between Barons Court-Acton Town
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SE13
In memoriam
RIP 23-Oct-2013
Glorious Gooner
Posts: 9,737
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Post by SE13 on Oct 4, 2013 20:34:53 GMT
As they always were. The only danger is the duck-under, although Piccadilly trains can still work the SSL, but I guess that the drivers doing so wouldn't be paid overtime!
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Post by Deleted on Oct 4, 2013 22:22:47 GMT
SSL stock are able to run on the Piccadilly line tracks between Barons Court-Acton Town I'm sure some will go further on the Picc with a couple of wrong signals lowered as it will happen one day. |
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Post by cstock5000 on Jan 2, 2014 14:15:42 GMT
Has anyone else noticed the S-Stock stop boards appearing on the Piccadilly Line Platforms recently. I always wondered how the S-Stock can fit down the Piccadilly Line's Loading Gauges?? This one was spotted at Hammersmith Piccadilly Line Eastbound platform at the end of September - is there an impending re-signalling of the Piccadilly Line forthcoming perhaps?? My guess is that Piccadilly line trains have to stop at the same point as S stocks for people travelling on the District line to walk straight across and vice versa. I know there are some flaws to this though. And remember, the track plan is |||| |=District |=Piccadilly |
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Post by norbitonflyer on Jan 2, 2014 15:10:32 GMT
I always wondered how the S-Stock can fit down the Piccadilly Line's Loading Gauges?? This is for the new "Sherlock" stock (hence the "S") exclusively premiered on BBC1 last night: external dimensions are those of Tube stock (resembling 1995/6 stock but with a 1972 stock cab front), but with the same internal dimensions as surface stock. They can run in six or seven car formations, with the seventh car being detachable out on the road between stations Seriously though - there are crossovers between Hammersmith and Barons Court allowing trains using the "centre" roads to switch to the outer ones: hence surface Stock can use the middle platforms at Hammersmith but not at Barons Court. There is a safety system which causes overheight vehicles (i.e surface stock trains) to trigger the train stop should they pass the point of no return. (Basically a silvered glass tube which, if broken, opens an electric circuit. Crude but effective - although I don't know of any incident where they have actually been triggered). I have seen, but cannot now find, a photo of the similar arrangement in place between West Hampstead and Finchley Road. perhaps something similar is needed at Blackfriars |
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Post by railtechnician on Jan 3, 2014 14:42:37 GMT
I presume the S stock stopping point is at exactly the same place as the 73 stock stop mark as there is no evidence of additional CSDE loop installation in the photo. Where different stocks use the same platform and stop at different stop marks each requires a separate CSDE loop aerial, the train's CSDE aerial being required to be ideally within the centre of the platform loop aerial.
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Post by Dstock7080 on Jan 3, 2014 15:00:36 GMT
I presume the S stock stopping point is at exactly the same place as the 73 stock stop mark as there is no evidence of additional CSDE loop installation in the photo. Where different stocks use the same platform and stop at different stop marks each requires a separate CSDE loop aerial, the train's CSDE aerial being required to be ideally within the centre of the platform loop aerial. S Stock do not use the 'traditional' CSDE loops mounted under the platform edge, they use track-mounted position detectors which pass information to front & rear of train. Train receivers being the rectangular plates on headstock.   |
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Post by railtechnician on Jan 3, 2014 15:37:21 GMT
I presume the S stock stopping point is at exactly the same place as the 73 stock stop mark as there is no evidence of additional CSDE loop installation in the photo. Where different stocks use the same platform and stop at different stop marks each requires a separate CSDE loop aerial, the train's CSDE aerial being required to be ideally within the centre of the platform loop aerial. S Stock do not use the 'traditional' CSDE loops mounted under the platform edge, they use track-mounted position detectors. Well that's news, thank you. I was responsible for the majority of CSDE surveys on the network and the installer of the first CSDE installations from Hammersmith to Barking back in 1990/1. The Redifon CSDE equipment was designed to have a 20 year life and AFAIK LUL certainly got what it paid for as it was/is a very reliable and fault free system. However, I am not surprised that technology has moved on, I expect the existing will last in service until all the stocks on all lines have been replaced. the worst part of a traditional CSDE installation was installing the loops especially at those sites where two stocks were used and two loops were required at one end of a platform, also some surface and subsurface sites where there was no platform at the stop mark to fit a loop to and we had to create metal support frames without creating a magnetic loop which would degrade the signal. Edit by Londonstuff: double post removed |
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Post by domh245 on Jan 3, 2014 16:12:07 GMT
S Stock do not use the 'traditional' CSDE loops mounted under the platform edge, they use track-mounted position detectors which pass information to front & rear of train. Train receivers being the rectangular plates on headstock. Don't those boxes also transmit the Track to Train CCTV, or is that done by the larger ones about halfway along the platform? |
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