enotayokel wrote:(ie 8 car train arrives at Salisbury, the front six coaches work on to Exeter, the rear 2 go on to Bristol, On arrival at Exeter the 6 coach rake splits again with rear 3 going to Paignton - front 3 works back to Salisbury where it combines with another 3 set to run into london as a 6 car train)
On Plymouth runs, the train is 6 beyond Salisbury, sometimes there is a stengthener of two cars dropped off at Saslisbury, this is what the 170s are usually used for. If it also goes to Bristol the two cars are dropped off and run to Bristol, this is a 158 though. Often, the 170 either runs back to London on its on or sometimes joins up with a 159 waiting in one of the platforms, sometimes the Up Bay (6 I think).
Once the 6 car train gets to St Davids, the rear 3 are detached and leave for Plymouth and the front 3 go into the sidings. Then when the rear 3 have returned from Plymouth, they are coupled back together and then run back to Salisbury, when they might be joined by another 2-car unit either off a Bristol run (remember out of 6 services a day, only 4 go through to London/come from London) or from sidings.
I'm not entirely sure about Paignton runs, but I doubt after the split at St Davids, one set runs back to Salisbury.
170s are used on the following services regularily -
- Brighton - Reading, via Fareham & Winchester.
- Totton - Romsey, via Eastleigh & Chandler's Ford.
- London Waterloo - Salisbury, via Basingstoke.
Not often do 170s go beyond Salisbury, usually they are either as strengtheners on other services, or run as a 2-car service.
So, yes, 170s are impratical for SWT, I've also heard they are not suited to the Chandler's Ford stopper due to their gearing, plus the fact most of them have two first class sections when traffic on that route is standard class. Only 170392 has a sensible amount of first class.
John