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New LO in car line diagram for ELLX Phase 2
wrote in message
... It is OK. It is a pity we cannot have two or three fleets covering a subset of Overground services. These trains could then carry simpler maps covering the are served. Are the actual sub-classes split rigidly between the bits of the network anyway? For example are there now some dual voltage units in regular use on the East London? Not at all split rigidly. As you probably know, there was originally a discrete number of DC only units ordered, and this fleet was sized for the original ELL, ie before the Highbury extension. All the subsequent orders (as the extensions were approved) were for dual voltage stock, and they can and do go anywhere on the overall electrified network. Hence all the dual voltage units need the full map. Paul S |
New LO in car line diagram for ELLX Phase 2
wrote in message
... On Fri, 30 Nov 2012 11:47:56 -0000 It seems very bizarre to have a short section of unelectrified line on an otherwise electrified system especially when its the obvious place for stock transfer. Unless for some reason they required complete electrical seperation between the AC and DC sections. According to posts elsewhere a year or two back it is a simplified system which does achieve electrical separation, and therefore can only be used for irregular movements, it is not designed for timetabled operation. The normal means of transfer of stock is via a number of route options in south London onto the WLL. Paul |
New LO in car line diagram for ELLX Phase 2
"Paul Corfield" wrote in message
... On Fri, 30 Nov 2012 08:44:45 +0000, Roger wrote: Why? Queens Road Peckham to Clapham Junction is DC. Have they put some AC between Surrey Quays and Queens Road Peckham? Weren't the additional trains for the SLL service dual voltage units? Bringing them into daily service means more dual voltage units on the ELL service overall. Correct. All the units ordered after the initial two subfleets were dual voltage, whatever the reason for the numbers required. This was discussed here firstly at the time the Highbury extension batch were ordered, and again when TfL announced that the last batch would also be dual voltage, IIRC this was the three additional units needed to take over the SLL. Paul S |
New LO in car line diagram for ELLX Phase 2
On Fri, 30 Nov 2012 09:17:38 +0000, Paul Corfield
wrote: On Fri, 30 Nov 2012 08:44:45 +0000, Roger wrote: On Thu, 29 Nov 2012 17:48:37 -0600, wrote: In article , (Jack Taylor) wrote: Colin Rosenstiel wrote in message ... Are the actual sub-classes split rigidly between the bits of the network anyway? For example are there now some dual voltage units in regular use on the East London? Yes, it's happened regularly since the a.c. services commenced. Most days there is at least one 378/2 working on the ELL. And presumably more from 9th December? Why? Queens Road Peckham to Clapham Junction is DC. Have they put some AC between Surrey Quays and Queens Road Peckham? Weren't the additional trains for the SLL service dual voltage units? Bringing them into daily service means more dual voltage units on the ELL service overall. My point is that from an operational point of view dual voltage is not required (unless they've put AC between Surrey Quays and Queens Road Peckham). So why does Colin Rosenstiel think there may be more dual voltage running down the ELL, unless that is all that is available. -- Roger |
New LO in car line diagram for ELLX Phase 2
On 30 Nov, 13:43, Roger wrote:
On Fri, 30 Nov 2012 09:17:38 +0000, Paul Corfield wrote: On Fri, 30 Nov 2012 08:44:45 +0000, Roger wrote: On Thu, 29 Nov 2012 17:48:37 -0600, wrote: In article , (Jack Taylor) wrote: Colin Rosenstiel wrote in message news:KamdnZHjcqkwVirNnZ2dnUVZ8lCdnZ2d@giganews .com... Are the actual sub-classes split rigidly between the bits of the network anyway? For example are there now some dual voltage units in regular use on the East London? Yes, it's happened regularly since the a.c. services commenced. Most days there is at least one 378/2 working on the ELL. And presumably more from 9th December? Why? Queens Road Peckham to Clapham Junction is DC. Have they put some AC between Surrey Quays and Queens Road Peckham? Weren't the additional trains for the SLL service dual voltage units? Bringing them into daily service means more dual voltage units on the ELL service overall. My point is that from an operational point of view dual voltage is not required (unless they've put AC between Surrey Quays and Queens Road Peckham). So why does Colin Rosenstiel think there may be more dual voltage running down the ELL, unless that is all that is available. Based on this and other threads: There are insufficient DC only sets to operate all DC only services. |
New LO in car line diagram for ELLX Phase 2
"Roger" wrote in message
... My point is that from an operational point of view dual voltage is not required (unless they've put AC between Surrey Quays and Queens Road Peckham). So why does Colin Rosenstiel think there may be more dual voltage running down the ELL, unless that is all that is available. He isn't suggesting more 'dual voltage running', but more dual voltage trains running in DC mode. Paul S |
New LO in car line diagram for ELLX Phase 2
On Fri, 30 Nov 2012 14:09:17 -0000, "Paul Scott"
wrote: "Roger" wrote in message .. . My point is that from an operational point of view dual voltage is not required (unless they've put AC between Surrey Quays and Queens Road Peckham). So why does Colin Rosenstiel think there may be more dual voltage running down the ELL, unless that is all that is available. He isn't suggesting more 'dual voltage running', but more dual voltage trains running in DC mode. Misunderstanding on my part. I didn't know that there was insufficient DC only stock. -- Roger |
New LO in car line diagram for ELLX Phase 2
"Roger" wrote in message
... He isn't suggesting more 'dual voltage running', but more dual voltage trains running in DC mode. Misunderstanding on my part. I didn't know that there was insufficient DC only stock. I've checked the numbers and it looks like there are 25 diagrams required for the ELL branches from the timetable change, so on the assumption that they'll have 2 or 3 of the 20 DC units undergoing maintenance at any one time, (85% typical utilisation?) you'd normally expect to see 7 or 8 dual voltage units (out of the fleet of 37) in use on the ELL on a daily basis. Paul S |
New LO in car line diagram for ELLX Phase 2
"Paul Scott" wrote in message
... I've checked the numbers and it looks like there are 25 diagrams required for the ELL branches from the timetable change, so on the assumption that they'll have 2 or 3 of the 20 DC units undergoing maintenance at any one time, (85% typical utilisation?) you'd normally expect to see 7 or 8 dual voltage units (out of the fleet of 37) in use on the ELL on a daily basis. PS - I see in the District Dave forum's similar discussion someone's posted: "The ac/dc units only need show the NLL/WLL and Watford-Euston route, unless there is a strong likelihood of units being hijacked for the ELL/SLL". Anyone got a login there who could put him right? Paul S |
New LO in car line diagram for ELLX Phase 2
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