S stock delivery & introduction - discussion

The only signs of any wear I have noticed on the S8's is on some of the forward facing seats where the wear appears to have been caused by peoples feet. I spend enough time on S8's to have noticed any serious wear.

This will be useful as testing of the new signalling is happening on the Hammersmith to Edgware Road stretch.

I wouldn't have thought 8-car trains could be accommodated into the platforms or 24Rd at Hammersmith.

Platform 1 only, and it requires so much mucking about signalling-wise to send it back.

The first S7 fitted with ATC should also be back fairly soon.

Are we allowed to ask what you have to do to send it back?

'S8-1' has been done before, but won't be this time. There will be enough ATC equipped S7s when needed. S8s are being done as well now, to spread them out through the programme for stock availability but have them all done when the first bit of their territory gets ATC.

Tut since we have not had a reply from those in the know...

I think we can make a good guess... If we had the diagram with distances and fouling points it will be easy.

The questions are...
1. With an S8 in the platform does it foul the track circuits that lock any points / crossings, we can presume that the cab will be beyond the starting signal.
2. Will an S8 be foul of the points?

A. If the S8 cab is beyond the stating signal but not foul of the track circuit controlling any points we could authorise it to depart, by whatever the method allowed by the L.U. rule book. i.e. The signalman will have to come to an understanding with the driver, and the signalman will have to be clear that any facing points are secure.

B. Now if it is foul of any track circuit that will lock the points, we will have to take out a possession then we could wind the points by hand and then authorise the train to depart.

C. If it is foul of the points we will need to use wrong road working and send it back the way it came.

I suspect that the answer is C, but if someone has a diagram with fouling distances, the track circuits, locking, and length of an S8 and willing to send a link. I could make suggestions of how it could be done according to B.R. rule book, I have never had a copy of the L.U. version!

I could draw you one, I think, but only signal and points numbers, track circuit boundaries would be a bit beyond me. Not to scale etc.

Okey dokey, I'll see what I can do

It's supposed to be the Circle and H&C's Hammersmith branch that'll be first I believe. Hammersmith to Paddington:

content.tfl.gov.uk/fpc-160121-item11-four-lines-modernisation.pdf

😢

I'm sure I saw 21063/4 on Trackernet at the weekend, although I haven't seen it since. As it happens it's the only S8 I've not travelled on, so might have to go for a trip to Aldgate and back once it's out.

At this moment, of the four ATC trains only 21041/2 is out, on train 421. Perhaps others will be out for the evening peak.

The S8s have been done first to ensure that the installation is compatible with both train fleets. The initial test train was an S7.

But yes, now the installation is 'proven' the fleets will be done in tandem, to ensure sufficient trains are available as each area migrates and to ensure that services can still be operated with no train shortage.

SMA (Signalling Migration Area) 0.5 = Hammersmith-Latimer Road, SMA 1 = Latimer Road-Paddington, SMA 2 = Paddington (both)/Finchley Road-Euston Square, SMA3 = Euston Square-Monument/Stepney Green. In other words, Hammersmith cabin, Edgware Road cabin, Baker Street SCC, Whitechapel cabin.

Careful rostering. The combined C&H uses ~36 trains per day, and not all of those stable on the C&H (I.e. Hammersmith, Barking, out stablers etc.). Nothing off the District has to stable at Hammersmith any more.

All of the go live dates are 'best case'. There's lots of slack built into the schedule (learning lessons from the Jubilee and Northern lines) and expect some areas to run late and others to run early.