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Author Topic: Class 387 coming to Thames Valley - ongoing discussion  (Read 148469 times)
ChrisB
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« Reply #615 on: October 07, 2017, 09:03:37 AM »

Now, was that the wires or more generally? Many trains disrupted this morning, including HSTs not requiring juice from wires, so undure why these would be delayed on the Main Line?
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TaplowGreen
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« Reply #616 on: October 07, 2017, 09:11:27 AM »

On a more complex railway, there is more to go wrong  Sad

Quote
05:47 Maidenhead to London Paddington due 06:32
05:47 Maidenhead to London Paddington due 06:32 was terminated at Hayes & Harlington.
It will no longer call at Southall, Ealing Broadway and London Paddington.
This is due to failure of the electricity supply.

Can someone stick 50p in the meter please?
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stuving
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« Reply #617 on: October 07, 2017, 10:23:35 AM »

Now, was that the wires or more generally? Many trains disrupted this morning, including HSTs not requiring juice from wires, so undure why these would be delayed on the Main Line?

It's these new-fangled electric signals, that's what. Bring back oil lamps!
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« Reply #618 on: October 08, 2017, 08:56:21 AM »

Now, was that the wires or more generally? Many trains disrupted this morning, including HSTs not requiring juice from wires, so undure why these would be delayed on the Main Line?

But HEX units do and they run Main Line.

Terminating an UP direction train at Hayes would not indicate a system wide OLE power failure, the Grid supply point is at Kensal Green (just east of OOC)  Its possible the Unit was faulty and need to get into West Ealing or there was and issue with the OLE that needed to be inspected before any more electric trains could pass over it
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Mark Carne 26 June 2015 - "The challenges of delivering myriad improvement projects while still running a railway seven days a week were simply overwhelming".
ray951
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« Reply #619 on: October 20, 2017, 09:00:15 AM »

They appear to be now storing these units at Didcot as there is one berthed in the DB Cargo yard, well away from any OLE.
With so few services to run I assume they must be running out of storage space at Reading.
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« Reply #620 on: October 21, 2017, 08:36:10 AM »

They appear to be now storing these units at Didcot as there is one berthed in the DB Cargo yard, well away from any OLE.
With so few services to run I assume they must be running out of storage space at Reading.

There has been some 12 car testing at Didcot station. 
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Mark Carne 26 June 2015 - "The challenges of delivering myriad improvement projects while still running a railway seven days a week were simply overwhelming".
Gordon the Blue Engine
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« Reply #621 on: November 11, 2017, 10:16:55 AM »

From 3rd January RTT is showing stoppers from Padd (which presumably will be 8 car 387’s) terminating and starting in P14A at Reading while XC’s are in P14B.  I thought the maximum length in the A ends was 6 cars, so how will this work?  I suppose one solution would be to move the X boards towards the B ends, but wouldn’t this need changes to the train detection systems in these platforms?
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paul7755
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« Reply #622 on: November 11, 2017, 12:28:18 PM »

From 3rd January RTT is showing stoppers from Padd (which presumably will be 8 car 387’s) terminating and starting in P14A at Reading while XC’s are in P14B.  I thought the maximum length in the A ends was 6 cars, so how will this work?  I suppose one solution would be to move the X boards towards the B ends, but wouldn’t this need changes to the train detection systems in these platforms?

Perhaps they do have a plan to re-platform XC that hasn't worked its way through yet.  Even if platform sharing at the lengths in question is feasible, they'd probably have to have another solution once the stoppers become full length Crossrail at 205m.

IIRC they should be able to go back to the routine where the XC Reading terminators used P3?

Paul
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stuving
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« Reply #623 on: November 11, 2017, 12:43:15 PM »

From 3rd January RTT is showing stoppers from Padd (which presumably will be 8 car 387’s) terminating and starting in P14A at Reading while XC’s are in P14B.  I thought the maximum length in the A ends was 6 cars, so how will this work?  I suppose one solution would be to move the X boards towards the B ends, but wouldn’t this need changes to the train detection systems in these platforms?

I've also found examples of an XC train being made to go and lurk in Kennet Bridge Loop for ten minutes - during which its platform isn't used by anything else - and another which is shown coexisting with a Paddington stopper reversing at the A end and then with another that comes in from the depot. So I think there will be some adjusting done, with the right XC trains going to wait outside instead of the wrong ones.

Something else that stands out when you look (but I think is true now) is that no attempt has been made to use the up platforms (14 and 15) for trains reversing and leaving for Paddington, and the down platforms (12 and 13) for XC and a few Bedwyns that reverse or commence and leave the other way. For example, at 06:42, trains leave for Paddington and Bedwyn. The 387 comes ECS from Maidenhead and uses P13, while the Turbo comes ECS from Reading depot and uses P14. At the same time there is a 387 arriving from PAD that uses P12 to reverse, and while it is there a goods train uses P15. If they all run to time you can do that with everything on the "right" platforms, unless maybe P15 needs a longer clear time to allow for good workings.
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paul7755
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« Reply #624 on: November 11, 2017, 01:36:07 PM »

I've also found examples of an XC train being made to go and lurk in Kennet Bridge Loop for ten minutes - during which its platform isn't used by anything else
IIRC that particular XC service has run via Kennet Bridge loop for quite a few timetables, I suspect it is to maintain route knowledge for when the move is actually required, during periods of reduced platform availability, probably during engineering works.

Paul
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Adelante_CCT
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« Reply #625 on: November 11, 2017, 05:16:26 PM »

Correct, that manoeuvre has been going on for some time.
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stuving
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« Reply #626 on: November 11, 2017, 06:51:59 PM »

I don't think that any platform sharing is needed at the moment; if any is done is could be avoided by swapping platforms. If there are any unavoidable cases, they are early and late when trains are going into or out of the depot and using P12-15 in place of P1-6. So assuming there are no more trains from January, that should still be true. Tthe new peak semifasts will change the pattern, but not very much.

The timetable seems to be created by a bit of software that has been told sharing is possible for Turbos and Voyagers, and has not been told it can't do that with 387s. Anything impossible will just have to be changed. Though of course GWR could use only 4-car 387s for the stoppers...at least out of the peaks...
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IndustryInsider
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« Reply #627 on: November 11, 2017, 06:58:33 PM »

They want to avoid coupling and uncoupling of 387s as much as possible as the coupling system is prone to damage unless it’s done on straight track.
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To view my cab run over the new Reading Viaduct as well as a relief line cab ride at Reading just after Platforms 12-15 opened and my 'before and after' video comparison of the Cotswold Line Redoubling scheme, see: http://www.dailymotion.com/user/IndustryInsider/1
Thatcham Crossing
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« Reply #628 on: November 20, 2017, 07:11:23 PM »

Counted 15 (at least) 387's parked-up in total at Maidenhead and West Ealing on my way into London today.

Wondering how many they need to run the service expansion in January?
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« Reply #629 on: November 20, 2017, 08:22:05 PM »

Counted 15 (at least) 387's parked-up in total at Maidenhead and West Ealing on my way into London today.

Wondering how many they need to run the service expansion in January?

Lots of them by the time the full timetable to Newbury commences in 2019, also the number of units ordered allowed for the Oxfords which will not happen until mid / end of CP6.

In addition there will be 12 car trains in the mix as well
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Mark Carne 26 June 2015 - "The challenges of delivering myriad improvement projects while still running a railway seven days a week were simply overwhelming".
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