DrJimi
Virtual District Line construction engineer and arborist
Posts: 365
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Post by DrJimi on Feb 8, 2010 19:09:12 GMT
I had long believed that the access from the EB slow and fast running lines to the east sidings (23/22/21) was via a double-slip. I believed the turnout off the slow crossed over the fast (diamond X) with slips to provide (a) slow to fast and (b) fast to sidings. However, re-checking my most recent diagram I see two distinct points. 67a/b provides a path from slow to fast, then 66a/b provides the path from fast to the siding entry. I do understand the possible paths and the related signaling, however...
Is this a double-slip or two distinct points? Clearly either would work as regards providing required paths, and the former might take less longitudinal space if that were an issue. My interest is in achieving accurate simulation, as you might expect ;D
Any and all info greatly appreciated!
Best, Jimi
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Deleted
Deleted Member
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Post by Deleted on Feb 8, 2010 19:36:44 GMT
My notes state the following:
24.05.82 - Slip points east of Acton Town from eastbound 'local' (District) platform 4 to east sidings replaced by separate new crossovers Nos.66 and 67.
Hope this helps.
As a matter of interest for our historians, it used to be possible to get from platform No.2 (westbound 'fast' Piccadilly) direct to the eastbound 'fast' (Piccadilly) via one of the sidings. This move was abolished 19.07.64, being one of the moves to reduce operational flexibility of the 1950s and 1960s. I have seen a colour a photo of L30 or L31 hauling a freight train ex-Acton Works through this move, just as it reaches the eastbound Piccadilly Line.
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Deleted
Deleted Member
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Post by Deleted on Feb 9, 2010 0:28:07 GMT
That's correct. 67s are the crossover from Local to Fast then the others to the sidings.
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Post by railtechnician on Feb 9, 2010 0:54:49 GMT
My notes state the following: 24.05.82 - Slip points east of Acton Town from eastbound 'local' (District) platform 4 to east sidings replaced by separate new crossovers Nos.66 and 67. Hope this helps. As a matter of interest for our historians, it used to be possible to get from platform No.2 (westbound 'fast' Piccadilly) direct to the eastbound 'fast' (Piccadilly) via one of the sidings. This move was abolished 19.07.64, being one of the moves to reduce operational flexibility of the 1950s and 1960s. I have seen a colour a photo of L30 or L31 hauling a freight train ex-Acton Works through this move, just as it reaches the eastbound Piccadilly Line. Yep Acton Town points were all part of my signal maintenance area and 66, 67 separate sets as stated. There is to this day a single slip (layout wise) on the westbound but it is wired and operated as the two A ends of 41 and 42 points. I believe the abolished move to which you refer was via 21 siding. I presume that the single slip became 41A & 42A at the same time that the west-east crossover move was abolished. Somewhere I think I may have an aerial photo of the site showing the layout before the crossover was abolished. |
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
Posts: 5,922
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Post by mrfs42 on Feb 9, 2010 13:36:25 GMT
This is the layout as in July 1965 when the programme machines were installed.  HTH. |
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Post by District Dave on Feb 9, 2010 15:10:49 GMT
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DrJimi
Virtual District Line construction engineer and arborist
Posts: 365
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Post by DrJimi on Feb 10, 2010 0:07:44 GMT
Thank you all - I'm indebted to you! The history and operational side of the railway (why things are done that way) is of great interest to me. I was also curious about the Works roads and related sidings, so you actually pre-empted a few other questions I'd likely have had. So we'll keep the MSTS simulation as an "80s version" with its slip, and do the Railworks version more up to date.
Dave - I think I've devoured every digram and 'article' on your site and TubePrune's over the years. I frequesntly go back and re-read them, and they continue to inspire me. Thank you all!
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Post by District Dave on Feb 10, 2010 22:40:54 GMT
Dave - I think I've devoured every digram and 'article' on your site and TubePrune's over the years. I frequesntly go back and re-read them, and they continue to inspire me. Thank you all! Jimi, Glad they continue to be of interest - one day I'll get round to revamping the site, but it's a daunting task! Dave |
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