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Post by snowman on May 19, 2018 8:52:49 GMT
What is that horrid squeaky sound that these trains make? The North-Western railway trains also have that... Its when they pull away. The Greater Anglia class 360 also do it. Its to do with the chopper circuits, as speed increases the frequency of the pulses increases, but to avoid strong electromagnetic interference, there are some jumps as certain frequencies are skipped. Creates Harmonics (the whistle sound). All goes back to old signalling which uses mains frequency track circhits, so the traction drive avoids shadowing 50Hz Forget the exact technical explanation but the sounds are generated by the pulses of power causing distortions.
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Post by Deleted on May 21, 2018 12:52:36 GMT
First ride on a 345 out West.
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Post by Deleted on May 21, 2018 14:22:46 GMT
Bish. Bosh. Bash.
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Post by Deleted on May 21, 2018 14:35:52 GMT
I thought the existing rolling stock was sticking around for a while. Good to see progress being made!
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Post by MoEnviro on May 21, 2018 17:22:28 GMT
'Existing' Class 360's to work to Heathrow, 'New' Class 345's to work to Hayes, combining to make 15 min service Paddington to Hayes.
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Post by ADH45258 on May 21, 2018 17:28:15 GMT
I thought the existing rolling stock was sticking around for a while. Good to see progress being made! The existing class 360s have been retained for the Heathrow Connect service, as a short term measure until signalling works at Heathrow are complete. The new class 345s have been introduced on the half-hourly Paddington to Hayes & Harlington service, formerly operated by GWR using 387s. For now, this provides a service pattern of 4tph between Paddington and Hayes & Harlington, with every other train continuing to Heathrow T4.
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Post by Deleted on May 22, 2018 18:48:52 GMT
Han is Well.
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Post by T.R. on May 24, 2018 14:03:22 GMT
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Post by Eastlondoner62 on May 26, 2018 10:08:33 GMT
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Post by routew15 on May 31, 2018 16:40:46 GMT
Does anyone know who is the provider of the ATC signalling in the tunnelled sections?
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Post by snoggle on May 31, 2018 21:35:34 GMT
Does anyone know who is the provider of the ATC signalling in the tunnelled sections? Siemens and Invensys consortium installing a form of CBTC and ATO. TfL deliberately went for CBTC despite it being "non standard" for national rail lines. It was concerned that ETCS would not be sufficiently well developed or proven in time to support the planned service levels on the Crossrail tunnel section. www.crossrail.co.uk/news/articles/crossrail-awards-signalling-system-contractSiemens have installed ETCS Level 2 and ATO on the Thameslink core.
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Post by routew15 on May 31, 2018 21:53:19 GMT
Does anyone know who is the provider of the ATC signalling in the tunnelled sections? Siemens and Invensys consortium installing a form of CBTC and ATO. TfL deliberately went for CBTC despite it being "non standard" for national rail lines. It was concerned that ETCS would not be sufficiently well developed or proven in time to support the planned service levels on the Crossrail tunnel section. www.crossrail.co.uk/news/articles/crossrail-awards-signalling-system-contractSiemens have installed ETCS Level 2 and ATO on the Thameslink core. Thank you for the link/information. I don’t know if I am being irrational but it does not feel as well published that Siemens and Invensys are providing an integral part in providing the coveted 24tph on the core, particularly as we are in the wake of Crossrail undergoing final testing phases.
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Post by snoggle on May 31, 2018 22:20:50 GMT
Siemens and Invensys consortium installing a form of CBTC and ATO. TfL deliberately went for CBTC despite it being "non standard" for national rail lines. It was concerned that ETCS would not be sufficiently well developed or proven in time to support the planned service levels on the Crossrail tunnel section. www.crossrail.co.uk/news/articles/crossrail-awards-signalling-system-contractSiemens have installed ETCS Level 2 and ATO on the Thameslink core. Thank you for the link/information. I don’t know if I am being irrational but it does not feel as well published that Siemens and Invensys are providing an integral part in providing the coveted 24tph on the core, particularly as we are in the wake of Crossrail undergoing final testing phases. Err we are nowhere near being "final testing phases". They haven't run regular test trains west of Stepney Green crossover yet. There is a tremendous amount of work to do to build up confidence and reliability in the signalling system and to ensure it works as expected and can handle a simulated service and recover from perturbations. TfL / MTR Crossrail have a massive amount of testing to do and log and record and Crossrail themselves with Siemens then have to get the entire system through the assurance and sign off stages. Note that all the things like tunnel fans, fire systems, comms, lighting, drainage / pumps, power supplies (that's just for the tunnels and tracks) all have to be independently tested and also proven to work with whatever management systems (network / line / area / station) are in place for whichever asset group. There is a parallel set of commissioning work for station systems like comms, CCTV, passenger info systems, ticketing, station management systems, heating / vent, lighting, fire systems, doors, equipment rooms, staff accommodation etc. You then have to get through an emergency services simulated accident and evacuation exercise in the tunnels and also get police / secret squirrel / fire sign off for every station too. Some of this will be ongoing against the designs but they need to ensure the built and commissioned reality aligns with the plans. There is a terrifying amount of work to do and I've missed off all the tedious stuff like training staff, training engineers / maintainers, familiarising them all with the railway plus the undoubted large volume of press and PR activity that will happen closer to opening time. A lot of Crossrail's project activities are now transferring into mainstream TfL departments - the latest Transition update covers some of this and it hasn't all gone smoothly either. Can you tell I've been involved in some big projects like the Jubilee Line Extension / rebuilding of Stratford station / line upgrades?
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Post by snowman on Jun 4, 2018 19:18:58 GMT
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Post by snoggle on Jun 4, 2018 20:32:48 GMT
I thought station handover was supposed to be from June but I suspect that has slipped somewhat. All this emphasis about the art installation is a nice distraction for what else is or is not happening. I don't understand your comment about phased introduction timetable. TfL still has to be able to reliably operate a 15 tph service from December 2018. Testing through to Paddington doesn't start until July and that's just the start of what will be an intensive testing and assurance programme. 4-5 months to complete that - that's one hell of a push given CBTC has no precedent on the National Rail network so all the assurance / sign off is a first time event. We also don't know whether class 345 reliability is actually improving or has plateaued at a low number that might not be acceptable for an intensive service where you have no option but to run class 345s. No nine car units are yet in daily service.
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