...but...
...so are you wanting 100mph 166s on the two line section at <s>Maidstone</s> Maidenhead (which will drag everything else on the GWML down to that speed to accomodate them)?
Or are diesels not running all the way to Paddington?
I'm confused.
I meant diesel locomotives would not be running to Pad. I was talking about locos when that was mentioned. Not turbos or 180s.
Youd do realise 319s are only 100mph dont you?
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In which case why bother electrifying London to Oxford at all? Cotswold Line expresses are getting on for half of the fast service between those two points. Think how much money that would save...
What Thunderbird locos? THE GW IEP plan involves all trains having some sort of diesel - even if it is just a shunting/'get out of trouble' one on the electric sets. Retain 180s for the Cotswold Line? Fine off-peak and contra-peak but not much use when morning peak HSTs arrive off the Cotswold Line at Oxford loaded with 500 passengers and the same applies the other way late afternoon and early evening.
Before you start advocating how to run the Cotswold Line, please do those of us who use it the courtesy of finding out about the services that are operating there now. As I note above you need a train with 500 or more seats in the peak. The only 165/6 workings left on weekdays are three off-peak trains that turn round at Moreton-in-Marsh - unless a 180 breaks again - and the morning halts train to Oxford and its westbound early run from Moreton.
So if there is no bi-mode IEP then you need something else for the Cotswold Line - and to Gloucester/Cheltenham, which is meant to go hourly with IEP. Keep more HSTs? Probably makes the case for electrification less attractive if you do. So use diesels dragging electric IEPs? That's a lot of loco for short off-peak trains. And if you care to sit down and work out how many locos will be needed to deal with hourly - or twice-hourly in the peak - trains starting/turning round at Moreton-in-Marsh, or Worcester, or Great Malvern, or Hereford across the course of the day, that's also a lot of locos and a lot of locos a long way from any FGW depot - unless you think dozens of miles of light engine running is efficient. Certainly not your and .
Again, look at the timetable first - since when have 20 trains each way daily between Oxford and Moreton-in-Marsh been "a few"?
Clearly you don't know the route. Otherwise you wouldn't write something quite so silly. From the early 1980s until 1993 most of the day you had to change at Oxford. Once the 166s and day-round through running arrived passenger numbers and fares revenue on the line rose by 25-30 per cent in just six months and have kept rising pretty much ever since. If you want to chuck all that away, then dmus only running west of Oxford are a fine idea.
And what about the Oxford-London fasts and peak Cotswold Line trains, where use of 166s has been pretty ridiculous for many years now, as the growth in traffic has far outstripped their capabilities - and they're not very good at keeping up with/out of the way of things doing 125mph - so a fat lot of use on a two-track 125mph line post-Crossrail - and this is one of your ?
But no-one is actually building such a machine. Unless Vossloh can be persuade to stick a very big MTU in a Eurolight and you keep everything crossed. The Caterpillar engine for the DRS locos has never been subjected to a duty cycle like that required for HSTs - only the Valenta/VP185 and MTU can handle it.
Now look back and see what my prefered options are. It definitely isnt a Turbo and it isnt a diesel loco north of Oxford. I have just been going through other options in the mean time, and answering somebody else that suggested locomotives north of Oxford.
My prefered option is actually a 222 with a panto car. Ive said the Cotswold services are perfect for a bimode. Ive never denied that. But you dont need IEP to give yourself a bimode.
Also, regarding diesel locos. It doesnt matter that nobody is building such a loco. Nobody had built a HST before it arrived. But we still built it. Every type of train has to have a first time. Oh, and only the Valenta/ VP185 and MTU engines have proved they can handle it. Doesnt mean they are definitely the only ones able to handle it.
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Bi-model will also cater for the trains to Cheltenham & Gloucester which you appear to have missed, which means more locos at Swindon under your proposal.
Thats not a problem. More bimodal 222s. They suit that journey quite well, just like the Cotswold services.
Assuming that the line to Westbury gets electrified then once the IC125's are replaced if they are not replaced by bi-model trains then all the Plymouth and Cornish services would have to call at Westbury (which some do not call at). If the electrification only stops at Newbury then all the services will have to call there (which very few of them call at). All of which means more under the wire running to get to a depot. it also means a fair number of locos as the run to Cornwall and back from Westbury takes 4 hours 20 minutes each way, so basicly 9 hours (10.5 hours from Newbury) before the loco is back and ready to run again. Unless you are proposing that it would be loco hauled from Reading (to avoid stopping at the end of the wires) which would require more locos.
Then of course what do you do with the locos when a service no longer needs them? More worrying what happens when there is no need for any intercity services to be hauled by loco and there a load of 15 years old locos sat idle?
Bi-model then allows for future changes to the network (for instance what would happen if electrification was done from London to Westbury and then from Exeter to Plymouth) without needing to change where the locos are based whilst maximising the use of electric traction.
Although there are going to be new depots I would have thought that they will be mostly upgrades to what is already there to cope with the new type of train. However this would be the case with any new stock, even if it was a class of train that already exists on the UK network but does not run on the GWML.
1- The new depots are not upgrades. They are brand new depots being built by Agility Trains. They have had to go through all the planning permission for these brand new depots. Did you not hear about the little lies they told to the locals in Bristol nearby to the planned depot? Said all the trains were electric trains, and would be totally silent. Failed to mention the diesel engines underneath the bimodes which will need to be maintained, and which will no doubt involve running these engines at full pelt every now and again.
2- I have been told before to think about people that will be using these trains, so I will have to say the same to you. There is a reason HSTs are staying on services to the far west. Its because the locals do not want underfloor engines. So the HSTs will be staying for the forseeable future.
Then there is another problem. IEPs are not being cleared down to Penzance. It is proving too expensive. So if you did go bimodal, you would have to use another type of bimodal unit. Well hardly any point splashing out so much money on IEP, if you end up needing another type of bimode unit.
Oh, and as for not needing these locos anymore, and them sitting idle. Do you really think you will all of a sudden see all these extra lines electrified? No, of course not. These locos will always be needed.
Anyway. Have to think of the passengers. They do not want underfloor engines on Intercity services to Cornwall. Have to think of the railway industry as well. They do not want IEP.
And that is the end of it from me. Gone way off topic, and went much further than it was supposed to. For which i apologise to anyone who has got severely brassed off.