Class 220 and maybe 221 units may have a good resale value if sold abroad. So they could be withdrawn and replaced by spare 175s & 185s. This would have the added advantage of often providing longer trains than the 4-car 220s at least.
Why would XC replace 125mph 4-car and 5-car IC units with 100mph 2-car and 3-car DMUs? I get that XC aren't able to run at 125mph on much of their network, but I'm sure there must be some 125mph running north of York on the ECML at least (is there anywhere else on XC where they can exceed 100mph?)
On the face of it the only obvious XC route for using the 175s is Cardiff-Nottingham, running as 5-car formations with a 175/0 coupled to a 175/1. However this would only use 14 of the 27 units, if you are willing to risk a 4 minute turnround at Nottingham, or 16 units if you have them sit in Nottingham for an hour before returning. I suppose if they can be pathed across the Newark flat crossing they could be extended to Lincoln which would increase the number of units in service to 18 (9 each of 3-car and 2-car) meaning two 175/0s and seven 175/1 available for maintainance and hot spares. That said, I think 5-car 222s (refurbished to reduce/remove first class in order to increase standard class capacity) would be a better and/or more-likely option for Cardiff-Nottingham to allow the use of 7-car 222s to suplement XC's Voyagers without spliting the 222s between TOCs).
no train in Australia ever runs at speed of more than 160 km/h (100mph) in passanger service
What about the XPT? Doesn't that do 125mph like its British Rail relatives?
It is probably cheaper (and more appropriate) in the short term to leave the 150s in service where they are and park up 175s, as 150s have better dwell times for many of the services they run.
Yes, but...
The 175s could replace the 195s that are doing the Northern Connect stuff, with the 195s replacing some 150s.
Putting aside from the comment from someone else that the Northern Connect brand has been dropped, those routes still exist it's just the name that may no longer be valid. So the underlying point still stands - the 175s could replace 195s on the regional express type services and the 195s could replace 150s.
Does Northern send end door stock through Castlefield?
I doubt it - I've read that anything with less than 5 coaches through Castlefield is required to have doors at thirds which was why KeolisAmey specified the 197s with doors at thirds. Not sure how true that is but the source is generally knowledgable as far as I know.
Yes, but every time it comes back to traincrew knowledge and training.
'Bald Rick' indicated in another thread that this cost easily runs into millions, at a time when a) the railway has no money and b) there are industrial relations issues.
Bald Rick said:
Anything that involves moving small fleets around requiring significant driver training is not going to happen. To put it in context, driver training for a small fleet costs the same as for a large fleet, for any given number of drivers. With a lot of drivers to do, training for a new fleet can run into millions…
That is probably why no one is interested in the 175s.
If crew training is the biggest issue, then surely TfW keeping them is the best answer since (most of?) the relevant crews already sign them. There has been talk of express services linking Cardiff to Carmarthen and Pembrokeshire via the Swansea District line, that would require more stock than TfW currently have planned and the 175s would fit the bill nicely. The issue would be maintenance which would need to move from Chester to Landore or Canton.
The drivetrain of 170s is more suited to limited-stop services, as they don't get out of "first gear" (this might not be the correct terminology, I'm no mechanic) until above 60mph, which increases fuel consumption on stopping services. It isn't a deal-breaker but it also isn't ideal. 195s would be the ideal units for diesel stoppers, but again being 24m vehicles means a maximum of 2-cars on routes that can currently take a 3-car 150.
Given that the 195s have doors at thirds presumably the front and/or rear third of the unit can overhang the ends of the platform and still have all passenger doors platformed provided the position of signals allows that, or do the 150s (also doors-at-thirds of course) already take advantage of that?
That is just door prejudice in action. The 170 has a regional express interior layout with large seats, luggage racks. When new, some had interior sliding doors and some still have first class. Same as 185s.
If the TfW 170s (which have a toilet in every carriage, unlike some other 170s) had interior sliding doors around every doorway (ie. proper vestibules, which I didn't realise they ever had for standard class) then I would
almost agree that they had a regional express interior layout. However, that would still leave two issues:
- toilets stuck in the corner of the passenger saloon so you can see the loo if somebody leaves the door open and if you need to use it everyone can see you are heading in there
- wider doorways / larger vestibules, meaning more standing room (which shouldn't be necessary on a regional express service) and less room for legroom and table bays (which are desirable on a regional express service)
Sort out those issues with the 170s and you are pretty damn close to the specification of the 175s, which makes the latter a virtually ideal regional express unit (lower running costs and end gangways would be nice, on which points they are beaten by the class 158).
'Door prejudice' is not without reason/justification. Yes you
can put a 170 on a stopper or a regional express service but the drivetrain makes them poorly suited to the former and the bodyshell design (door layout
AND door width) makes them poorly suited to the latter.
The drivetrain of 170s is more suited to limited-stop services, as they don't get out of "first gear"
That's a strange decision for a unit like the 170, with its' suburban interior layout.
This is exactly why I don't consider the 170s to be a good fit for anything (they are a bit of a wanabee Schrödinger's unit that tries to be regional express and suburban at the same time and therefore fails to be ideal for either). The 175s are different, which is why I hope a good use is found for them.