Mods please check the Moderators Group for an important update on Mod tools. If you do not have access to the group, please PM Niamh. Thanks!

Rolling stock for Dart+ expansion

13»

Comments

  • #2


    loyatemu wrote: »
    Metrolink is going to automatic and driverless, there's no benefit in mixing Dart and Metro, they'll be completely separate systems.

    That is true.


  • #2


    L1011 wrote: »
    Metrolink is going to be 1485mm.

    An Australian specialist manufacturer is not likely to be price competitive in a tender for what is basically an off the shelf metro system


    As for the gauge being an issue - engineering wise it's not hard to overcome, but it makes the order become custom. This massively puts up the price particularly for small orders like we did through the 90s.

    The manufacturer for the Australian order was Chinese so price could be competitive but I can't imagine a large and expensive order going to China when we have had no history or experience with Chinese rolling stock before.


  • #2


    highdef wrote: »
    The manufacturer for the Australian order was Chinese so price could be competitive but I can't imagine a large and expensive order going to China when we have had no history or experience with Chinese rolling stock before.

    We have bought dodgy trains before that are retired early, so I think experience might not be always a good point.


  • #2


    The price will govern who gets the deal.

    Although the gauge for Metrolink is set as Standard Gauge, there is no mix with Luas infrastructure at present, but there is a plan to extend to Sandyford. The advantage to go with 1.6m gauge would be the ability to mix Metro and Dart trains.

    There are political reasons not to want to do that, and cost reasons. The cost would be mitigated if the order for rolling stock was large enough. The political reasons are for another thread.

    There is absolutely nothing that is going to change Metrolink to 1600mm.


  • #2
    Rumour is we’ll be getting Alston Xtrapolis (Battery) EMUs. (Hassard Stacpoole on Twitter).
    Hopefully they’ll be more reliable than previous alstom emus...

    Surprised it wasn’t Bombardier Aventras (Crossrail) or Siemens (Thameslink). They both make 8 car 160m units with decent acceleration.

    Melbourne are getting some 1600mm Alstoms so they could be quite similar although they have 3x doors per carriage length


  • #2


    Rumour is we’ll be getting Alston Xtrapolis (Battery) EMUs. (Hassard Stacpoole on Twitter).
    Hopefully they’ll be more reliable than previous alstom emus...

    Surprised it wasn’t Bombardier Aventras (Crossrail) or Siemens (Thameslink). They both make 8 car 160m units with decent acceleration.

    Melbourne are getting some 1600mm Alstoms so they could be quite similar although they have 3x doors per carriage length

    The Railway Magazine article snippet on Pocketmags.com is reporting that these Alstom carriages will be delivered to IÉ as a mix of 5 and 10 car hybrid units. Oh my goodness. That might mean that IÉ will have to extend the existing DART platforms further to cater for a extra 2 DART carriages per platform per station. These guys were responsible for building the unreliable 8200 class DART units from years ago. Also; would these carriages be like the same type that are used for revenue earning service in South Africa as these trains are described and sold as suburban trains going from Alstom's official website? I do think it's good that the NTA & IÉ have stuck with Alstom for this order as they have supplied them with trams for the Luas for many years since 2004 up until very recently for the BXD Line to Broombridge.


  • #2


    The Railway Magazine article snippet on Pocketmags.com i

    How do I get to that article snippet via the link your provided? I'm brought to a page of various online magazines that I'm prompted to purchase should I want to read any of them.


  • #2


    Hopefully they’ll be more reliable than previous alstom emus...

    they were built in 1999, that was quite a long time ago.


  • #2


    It's worth noting that it's articulated.

    Also refers to 750 carriages. Jim Meade also said 750 a few months back.
    The Railway Magazine article snippet on Pocketmags.com is reporting that these Alstom carriages will be delivered to IÉ as a mix of 5 and 10 car hybrid units. Oh my goodness. That might mean that IÉ will have to extend the existing DART platforms further to cater for a extra 2 DART carriages per platform per station. These guys were responsible for building the unreliable 8200 class DART units from years ago. Also; would these carriages be like the same type that are used for revenue earning service in South Africa as these trains are described and sold as suburban trains going from Alstom's official website? I do think it's good that the NTA & IÉ have stuck with Alstom for this order as they have supplied them with trams for the Luas for many years since 2004 up until very recently for the BXD Line to Broombridge.

    10 cars the same length as current ones would be crazy and would not only require extending current platforms but would also make DART+ Tunnel more expensive. Shorter cars, maybe.

    Existing DARTs are around 20-21m per car. An 8 car set is 160-170m. The Xtrapolis 2.0 being used in Melbourne is almost 24m per car. A 10 car set would be almost 240m with a capacity of 2,000 passengers

    They might be recycling the Xtrapolis UK they used to unsuccessfully bid for Thameslink. They were under 16m per car.
    https://www.railwaygazette.com/news/alstom-unveils-xtrapolis-uk/34424.article




  • #2
    Peregrine wrote: »
    It's worth noting that it's articulated.

    Also refers to 750 carriages. Jim Meade also said 750 a few months back.

    They might be recycling the Xtrapolis UK they used to unsuccessfully bid for Thameslink. They were under 16m per car.

    I'd guess that the 750 figure includes the 41 ICRs and new enterprise fleet as the Dart+ website still says 600 units.

    I can see why Thameslink went with Siemens... Much more aesthetically pleasing


  • #2


    I'd guess that the 750 figure includes the 41 ICRs and new enterprise fleet as the Dart+ website still says 600 units.

    I can see why Thameslink went with Siemens... Much more aesthetically pleasing
    Just checked and he said 600 carriages at the Oireachtas Transport Committee in February and then 750 electric carriages in this article in April. 750 was also mentioned at an event in March.
    https://www.thetimes.co.uk/article/light-at-end-of-lockdown-tunnel-for-iarnrod-eireann-boss-jim-meade-lc6csf2f7

    I doubt aesthetics had much to do with it. In fact, I think it was the articulation and the resulting axle load which led to Alstom's disqualification in the early stages.




  • #2
    Peregrine wrote: »
    Just checked and he said 600 carriages at the Oireachtas Transport Committee in February and then 750 electric carriages in this article in April. 750 was also mentioned at an event in March.


    I doubt aesthetics had much to do with it. In fact, I think it was the articulation and the resulting axle load which led to Alstom's disqualification in the early stages.

    If the units will be 5 car instead of 4 car that would account for the extra 25% figure without actually having more capacity.

    I was half joking with the aesthetics comment but I do think the Siemens class 700 are a lot more elegant.

    I think RailUsersIre said IÉ ruled out articulated carriages (not 100% sure though). I'd still be surprised if we got them as we've never had any before (i think)


  • #2


    If the units will be 5 car instead of 4 car that would account for the extra 25% figure without actually having more capacity.

    I was half joking with the aesthetics comment but I do think the Siemens class 700 are a lot more elegant.

    I think RailUsersIre said IÉ ruled out articulated carriages (not 100% sure though). I'd still be surprised if we got them as we've never had any before (i think)

    I think you may be spot on here.




  • #2


    Can't see them going for anything beyond 170m. What benefit would going for 5/10 car sets over 4/8 offer. The operating and maintenance costs will increase significantly.


  • #2
    IE 222 wrote: »
    Can't see them going for anything beyond 170m. What benefit would going for 5/10 car sets over 4/8 offer. The operating and maintenance costs will increase significantly.

    The tender says they must be 160-168m coupled up. Anything longer would require platform extensions and make DU more expensive. (You can cram a thousand commuters onto a current dart)

    I suppose a benefit of more carriages would be more doors (20 per 160m train vs current 16) although I would’ve preferred something similar to the the Class 345 (crossrail) with 3 doors per carriage length.


  • #2


    I'm taking it that it's definitely not the city duplex models, for a double deck car they don't look overly tall would they fit under the bridges here??


  • #2


    I know this isn't exactly that important, but their physical design looks very outdated, uninspiring and bland compared to Alot of similar new units.


  • #2


    I know this isn't exactly that important, but their physical design looks very outdated, uninspiring and bland compared to Alot of similar new units.

    Which one are you looking at?

    This will probably be a new model anyway.




  • #2


    The tender says they must be 160-168m coupled up. Anything longer would require platform extensions and make DU more expensive. (You can cram a thousand commuters onto a current dart)

    I suppose a benefit of more carriages would be more doors (20 per 160m train vs current 16) although I would’ve preferred something similar to the the Class 345 (crossrail) with 3 doors per carriage length.

    Yeah the whole depot would need a complete redesign as well and parts of that where struggling to cater for 168m lengths if I remember correctly.

    Bigger doors will do the same job. Extra wheels, bodies, components, seats, lights ect will massively outweigh any benefits of a few extra doors. The extra doors is extra maintenance as well.


  • #2


    I'm taking it that it's definitely not the city duplex models, for a double deck car they don't look overly tall would they fit under the bridges here??

    Definitely wont be double deckers.


  • #2
    IE 222 wrote: »
    Yeah the whole depot would need a complete redesign as well and parts of that where struggling to cater for 168m lengths if I remember correctly.

    Bigger doors will do the same job. Extra wheels, bodies, components, seats, lights ect will massively outweigh any benefits of a few extra doors. The extra doors is extra maintenance as well.

    I assume Drogheda and Fairview will be getting upgraded while Maynooth will be built from scratch so should be ok.

    There’s only so wide you can go with doors (1.7metres?). Having a shorter distance to squeeze through people reduces chances of missing your station. More doors allows shorter dwell times increasing speed and throughput. As I said my preference would be for fewer but longer carriages but this is what IÉ have chosen!


  • #2


    Peregrine wrote: »
    Which one are you looking at?

    This will probably be a new model anyway.

    The Melbourne ones but had a look at the newlt delivered South African ones and there certainly an improvement.


  • #2


    The Melbourne ones but had a look at the newlt delivered South African ones and there certainly an improvement.

    The X'Trapolis 100 is an older design. We won't be getting that. Melbourne are moving to the newer 'X'Trapolis 2.0'. Interestingly, they just placed the order last month.

    https://www.railwaygazette.com/traction-and-rolling-stock/victoria-to-buy-updated-xtrapolis-emus/59146.article

    I think we'd be the first BEMU customer for the X'Trapolis though. Alstom's first BEMU contract was signed in 2020 and will enter service in Germany in 2022.

    https://www.alstom.com/press-releases-news/2020/2/alstom-signs-first-contract-battery-electric-regional-trains-germany




  • #2


    IE last week issued a tender for DART+ Rail Fleet Advisory Services;

    Are the tenders back yet?



  • #2


    The new MersySide Class 777 trains looks nice.



Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.