As I have shown before the costs from increased numbers of vehicles are actually quite small - since you don't actually need that many extra vehicles.
(A 9-car set matches a 2x5-car lashup).
Once you account for the pain that is attempting to change formation lengths in service it adds a few percent to running costs at most.
Unless you store the extra sets in the platforms at Paddington you will require additional ECS moves too and from stables - however storing in the platform will reduce your station flexibility rather drastically. In disruption you could end up with nine car sets queued and unable to get into platforms because they are half full of stabled trains.
In an approach as congested as the Paddington one will be post-Crossrail it seems like a bad idea to pack in more ECS moves.
Crew savings are likely to wipe that out the extra leasing and mileage costs to a large degree.
Also pretty sure we are at the point where the trains would all be well loaded between Reading and Paddington no matter how long they are.
Portion working with loco hauled stock is an eminently different thing to doing it with units.
The units will require additional crewing unless you want the dilution of the first class offer or similar, they will reduce capacity per metre of platform length and they won't actually need that many vehicles.
There is not necessarily a requirement to have every train be nine-car. "Full length" would mean that there would not normally be lashups.
You can arrange diagrams such that some sets are nine car and arrange for those diagrams to be the ones working the high peak in the peak direction.
Especially on longer journeys where a train might work a handful of trips per day. (Swansea/Plymouth/Penzance especially).
Virgins problems are caused by an idiotic peak-offpeak price split and a hard delineator that has people waiting on the platform while half a dozen sets leave the station before all scrumming onto the first off peak one.
The trains would be far more evenly loaded with a saner fares policy. Rather than a bunch of half empty trains and a handful of drastically overloaded ones.
And yet it is not ordering IEPs, but yet another incompatible unit that will never be ordered by anyone else in all likelyhood.
--- old post above --- --- new post below ---
For example:
Let's compare running 9-car trains Paddington-Penzance compared with a ten car train between Paddington and Plymouth and five cars for the rest of the way.
Journey time for PNZ-PAD is 5hr25 each way, which means something like a 12 hour cycle time. 1tp2h means six sets required in service. So seven sets total.
7 x 9 = 63 vehicles.
You would require seven sets of five cars for the Penzance portion)
7 x 5 = 35 vehicles.
Penzance-Plymouth is 3hr18 - which means something like a 7 hour cycle time. So 4 sets required for that portion.
4 x 5 = 20 vehicles.
55 vehicles doing in that way.
So by embracing this glorious double working concept you have saved a grand total of eight vehicles.
That isn't much when you consider all the operational troubles you've bought yourself.
Yes indeed, you have come out with all this stuff before, others take a different view. If coupling and uncoupling trains in service is such an operational trauma, why is it done all over the world, day in, day out?
Why would you be 'storing' trains at Paddington? They could go to North Pole for maintenance, rather like some HSTs do during the day at Old Oak Common right now, or they could be out there beefing up off-peak frequencies, etc, etc, by splitting 2x5 formations - which can't happen with a 'full-length' train.
Additional crewing - did you notice the bit in the announcement about 100 more staff?
Portion working is a whole lot easier with units than locos, so what's the problem?
And if it is now the case that
There is not necessarily a requirement to have every train be nine-car. "Full length" would mean that there would not normally be lashups.
You can arrange diagrams such that some sets are nine car and arrange for those diagrams to be the ones working the high peak in the peak direction.
could you enlighten us as to what your definition of 'full-length' now is, because if it isn't five cars, is it six, seven, eight or ten, 11, 12? FGW work HSTs in the direction of peak flows with, er, five-car 180s working in the opposite direction on Oxford and Cotswold duties in the way you describe right now...
Virgin's issues are not all about the peak/off-peak split - that is one aspect of the policy at certain points in the day, with long periods in between when there are still lots of seats plying up and down that are not going to be filled, however clever the fares policy.
In what way is the likely West Country order "incompatible", it's basically an IEP with more power and a bigger diesel tank, which you can bet your life will be able to couple to and work with the other 800/801 type trains - unlike the Voyagers and Meridians. The Hitachi announcement yesterday describes them as a refined version of the design and "closely related to the Class 800".
Who else would want to order some anyway? The GW and EC routes will both be equipped with them by the end of 2019, bar the handful of remaining IC225s, West Coast's 221 and 390 fleets have plenty of life in them, and there will be 222s looking for a good home by the bucketload in 2020-21, so unless XC or GC develops a sudden passion for bimodes or Abellio decides to ditch its Scottish HSTs plan, none of which seems likely, can you name me another route that would need a 140mph-capable bi-mode express unit?