Colin
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Post by Colin on Jan 22, 2008 17:03:56 GMT
They're of the temporary type, which suggests they've been installed* for upcoming engineering work; having checked the planned stuff, there's a fair bit in April/May on the east end of the District, but nothing to suggest that these are required.
So........
Anyone have any ideas as to why they've been put there?
*= installed, but not yet commissioned.
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TMBA
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Post by TMBA on Jan 22, 2008 17:25:01 GMT
I was told that the westbound one is for trains coming into service from Upminster and the eastbound one would be for trains coming out of Barking sidings.
Plus as you state the engineering works would be using them as well.
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Post by happybunny on Jan 22, 2008 17:58:14 GMT
I was told that the westbound one is for trains coming into service from Upminster and the eastbound one would be for trains coming out of Barking sidings. Plus as you state the engineering works would be using them as well. Isn't there a tripcock tester at Upney EB for trains coming into service from Barking sidings? |
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Deleted
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Post by Deleted on Jan 22, 2008 20:21:25 GMT
I was told about two months ago they were coming and were to be a permenant instalation to allow for unexpected service shutdowns where it remains possible to run an Upminster - Hornchurch shuttle. (both roads, thus testing both cab's trip arms)
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Colin
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My preserved fire engine!
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Post by Colin on Jan 22, 2008 22:51:03 GMT
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Tom
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Post by Tom on Jan 23, 2008 0:10:13 GMT
They have recently - I was involved in works last week to get to installed at Barbican.
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Deleted
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Post by Deleted on Jan 23, 2008 0:11:36 GMT
I was told about two months ago they were coming and were to be a permenant instalation to allow for unexpected service shutdowns where it remains possible to run an Upminster - Hornchurch shuttle. (both roads, thus testing both cab's trip arms) Or an Upminster - Dagenham East shuttle. |
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Deleted
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Post by Deleted on Jan 23, 2008 5:50:30 GMT
I'm certainly aware that such shuttles have run in the past but how come no one's ever questioned it before? They have double checked it now. Last week we Had an Amersham - Watford / Northwood service which we have had before, however this time we had specific instructions not to use platform one (so all trains had to go into 2, and into the sidings and back south through platform 3) so that both ends of the train were tested every time the train was at Amersham, otherwise it wouldnt be tested. Also last year tripcock testers were installed in the bay road at Chalfont, so when the shuttle comes south into the bay it has both ends of the train tested, i am not entirely sure how it works, but it does the job! |
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Post by tubeprune on Jan 23, 2008 7:27:18 GMT
They have recently - I was involved in works last week to get to installed at Barbican. Does this mean that the TTs at KX will be removed? |
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Tom
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Post by Tom on Jan 23, 2008 12:19:29 GMT
They're at Euston Square, and no. The Barbican ones were to ensure a tripcock test took place when there is no service west of KX.
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Tom
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Post by Tom on Jan 23, 2008 12:22:04 GMT
Also last year tripcock testers were installed in the bay road at Chalfont, so when the shuttle comes south into the bay it has both ends of the train tested, i am not entirely sure how it works, but it does the job! I commissioned those - they work in exactly the same way as a normal tester but one is rotated and positioned to test the rear tripcock. |
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metman
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Post by metman on Jan 23, 2008 13:22:11 GMT
How does that work? I thought the rear tripcocks were up when at the trailing end!
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Deleted
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Post by Deleted on Jan 23, 2008 17:02:57 GMT
How does that work? I thought the rear tripcocks were up when at the trailing end! No, rear tripcocks are down. On some stocks (eg C stock) they can cause trains to get back tripped on other stocks (D stock) they will just give the driver an indication that the rear trip has operated but no brake application. Middle cab trips are normally up and isolated. |
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Deleted
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Post by Deleted on Jan 24, 2008 2:32:56 GMT
And of course the original C stock circuitry made it impossible to get back tripped until modifications were made for OPO(?).
Has it been the case in the past that missing/damaged/decommissioned tripcock testers will actually prevent services running between reversing points?
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PGtrips
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Post by PGtrips on Jan 24, 2008 20:57:24 GMT
Interesting thread that has got me thinking....
Two questions:
1) What is the procedure for enabling/testing the tripcock when you either take a train into service or change ends?
2) What happens in the case of a planned wrong road movement for engineering work? For example during the construction of the Victoria line at Highbury in c1965, the Northern City ran as two single line shuttles in the evenings with 'one engine in steam' on each: Moorgate - Essex Road, Essex Road - Drayton Pk with cross platform interchange at Essex Rd. Also, elsewhere on this site, there are pictures of wrong road working at Bow Rd. What would be the arrangements for tripcocks and signalling generally for such moves?
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Deleted
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Post by Deleted on Feb 5, 2008 2:45:22 GMT
Interesting thread that has got me thinking.... Two questions: 1) What is the procedure for enabling/testing the tripcock when you either take a train into service or change ends? 2) What happens in the case of a planned wrong road movement for engineering work? For example during the construction of the Victoria line at Highbury in c1965, the Northern City ran as two single line shuttles in the evenings with 'one engine in steam' on each: Moorgate - Essex Road, Essex Road - Drayton Pk with cross platform interchange at Essex Rd. Also, elsewhere on this site, there are pictures of wrong road working at Bow Rd. What would be the arrangements for tripcocks and signalling generally for such moves? 1) Tripcocks are tested by depot staff during train prep, prior to trains entering service. There is no procedure to test when changing ends. The tripcock gets tested en route. 2) There was an occasion a few years back when during engineering work meaning a Dag East - Upminster shuttle was run. Trips were tested by trains passing shunt signals at danger in Upminster depot under instruction. |
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