hobbayne
RIP John Lennon and George Harrison
Posts: 516
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Post by hobbayne on Jun 23, 2014 7:52:26 GMT
The 92 stock will be undergoing a trial for 100 kph running over the next few weeks, so watch this space!
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Deleted
Deleted Member
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Post by Deleted on Jun 23, 2014 8:03:00 GMT
Interesting! It's what they did before the Chancery Lane derailment?
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roythebus
Pleased to say the restoration of BEA coach MLL738 is as complete as it can be, now restoring MLL721
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Post by roythebus on Jun 23, 2014 12:44:51 GMT
A stock was doing that in 1962!
100km/h, not derailing at Chancery Lane...
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Antje
侵略! S系, でゲソ! The Tube comes from the bottom of London!
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Post by Antje on Jun 23, 2014 14:36:32 GMT
100 kph running is possible at straight and open sections like West Ruislip to North Acton and similar.
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Post by domh245 on Jun 23, 2014 14:50:10 GMT
100 kph running is possible at straight and open sections like West Ruislip to North Acton and similar. But not permitted, as it ruins the trains apparently. I imagine that these tests will be to ensure that running at 100kph won't destroy anything. |
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Post by melikepie on Jun 23, 2014 14:52:48 GMT
According to Wikipedia, the 95 stock doesn't run at 60mph in the centre due to poor conditions of the rails underground. I imagine this also applies to the Central Line centre and trains
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Post by sawb on Jun 23, 2014 16:52:05 GMT
According to Wikipedia, the 95 stock doesn't run at 60mph in the centre due to poor conditions of the rails underground. I imagine this also applies to the Central Line centre and trains Plus some fairly sizeable curves, like those on the approach to Bank |
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Post by domh245 on Jun 23, 2014 16:57:00 GMT
According to Wikipedia, the 95 stock doesn't run at 60mph in the centre due to poor conditions of the rails underground. I imagine this also applies to the Central Line centre and trains Plus some fairly sizeable c urves, like those on the approach to Bank I also have my suspicions that with the fairly close spacing of stations in the core, they wouldn't be able to get up to 60 for long if at all. Maybe between Kennington and Waterloo, but unlikely. I suspect that 60Mph will be seen on the above ground branches of the northern line before the tunnels *crosses fingers for next timetable* |
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Chris M
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Post by Chris M on Jun 23, 2014 18:58:49 GMT
A stock was doing that in 1962! 100km/h, not derailing at Chancery Lane... I think derailment would be the least of your worries with an A stock at Chancery Lane! |
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Ben
fotopic... whats that?
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Post by Ben on Jun 23, 2014 19:24:16 GMT
Chortle chortle!
I wouldnt take wikipedia at face value for railway things unless you know and trust the author behind that section. The rails can't be in that bad condition because it wasn't that long ago that they were replaced... Maybe a decade?
Its more likely to be poor alignment, with the changes in direction accounting for any PSRs.
The outer, surface, and newer sections of each line are generally suitable for faster running. However, this capability has been degraded over time, either to reduce the wear and tear on rolling stock, or reduce the capital needed for civils work to keep the track and alignments in good order.
Surely now that the 1992 tube stock has had almost everything replaced on it apart from the lightbulbs it might fare a bit better at speeds its predecessors did daily for 30-odd years?
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Tom
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Post by Tom on Jun 24, 2014 15:31:57 GMT
Chortle chortle! I wouldnt take wikipedia at face value for railway things unless you know and trust the author behind that section. The rails can't be in that bad condition because it wasn't that long ago that they were replaced... Maybe a decade? Part of the Central Line Project's master plan was some track renewal in the tunnel sections to permit 100km/h operation. However the work never went ahead, I believe because of clearance issues. |
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Deleted
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Post by Deleted on Jun 24, 2014 15:43:26 GMT
I can't imagine 100 kph being necessary - or even attainable west of Liverpool Street, though - the stations are too close together and, obviously, you could never hit 100 kph in the tight twisty sections, that's a given. It'd only really be attainable Liverpool Street - Stratford where you have good long stretches where a higher maximum safe speed might pay dividends.
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North End
Beneath Newington Causeway
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Post by North End on Jun 24, 2014 16:35:25 GMT
I can't imagine 100 kph being necessary - or even attainable west of Liverpool Street, though - the stations are too close together and, obviously, you could never hit 100 kph in the tight twisty sections, that's a given. It'd only really be attainable Liverpool Street - Stratford where you have good long stretches where a higher maximum safe speed might pay dividends. I can never envisage 92 stock doing 100 km/h in the tunnel sections - currently I think the highest speed in the tunnels is 65 km/h - possibly with the odd exception. Likewise, it's difficult to envisage massive speed uplift in the Northern Line tunnel sections. Currently the highest speed attained is 40 mi/h. There may be scope to raise the speed a little, but I think the main focus on the Northern Line is the removal of lower speed restrictions in various locations. The fastest tunnel running at present, I believe, is the Jubilee, who consistently reach 60 mi/h in certain places between Baker Street and Canning Town. The Vic I think reaches 50 mi/h consistently as well, and could probably do more if required. However the Picc with its trusty 73 stock is not far behind, with 45 mi/h consistently achieved in places, plus some faster running in certain sections like Heathrow T123 to T5. |
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Deleted
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Post by Deleted on Jun 24, 2014 17:04:15 GMT
I can't imagine 100 kph being necessary - or even attainable west of Liverpool Street, though - the stations are too close together and, obviously, you could never hit 100 kph in the tight twisty sections, that's a given. It'd only really be attainable Liverpool Street - Stratford where you have good long stretches where a higher maximum safe speed might pay dividends. I can never envisage 92 stock doing 100 km/h in the tunnel sections - currently I think the highest speed in the tunnels is 65 km/h - possibly with the odd exception. Likewise, it's difficult to envisage massive speed uplift in the Northern Line tunnel sections. Currently the highest speed attained is 40 mi/h. There may be scope to raise the speed a little, but I think the main focus on the Northern Line is the removal of lower speed restrictions in various locations. The fastest tunnel running at present, I believe, is the Jubilee, who consistently reach 60 mi/h in certain places between Baker Street and Canning Town. The Vic I think reaches 50 mi/h consistently as well, and could probably do more if required. However the Picc with its trusty 73 stock is not far behind, with 45 mi/h consistently achieved in places, plus some faster running in certain sections like Heathrow T123 to T5. Where does the Northern hit 40 mph in the pipe, out of interest? |
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Post by bigvern on Jun 24, 2014 18:13:02 GMT
I can never envisage 92 stock doing 100 km/h in the tunnel sections - currently I think the highest speed in the tunnels is 65 km/h - possibly with the odd exception. Likewise, it's difficult to envisage massive speed uplift in the Northern Line tunnel sections. Currently the highest speed attained is 40 mi/h. There may be scope to raise the speed a little, but I think the main focus on the Northern Line is the removal of lower speed restrictions in various locations. The fastest tunnel running at present, I believe, is the Jubilee, who consistently reach 60 mi/h in certain places between Baker Street and Canning Town. The Vic I think reaches 50 mi/h consistently as well, and could probably do more if required. However the Picc with its trusty 73 stock is not far behind, with 45 mi/h consistently achieved in places, plus some faster running in certain sections like Heathrow T123 to T5. Where does the Northern hit 40 mph in the pipe, out of interest? the fastest Tunnel section on the Northern Line was from East Finchley to Highgate, although with TBTC this is currently slower. |
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Deleted
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Post by Deleted on Jun 24, 2014 18:40:41 GMT
Had a District Line TOp in the cab a few weeks and they we're bottling it while we were going 65kph in the Pipe, apparently that's a lot faster than they get to do.
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North End
Beneath Newington Causeway
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Post by North End on Jun 24, 2014 19:45:43 GMT
I can never envisage 92 stock doing 100 km/h in the tunnel sections - currently I think the highest speed in the tunnels is 65 km/h - possibly with the odd exception. Likewise, it's difficult to envisage massive speed uplift in the Northern Line tunnel sections. Currently the highest speed attained is 40 mi/h. There may be scope to raise the speed a little, but I think the main focus on the Northern Line is the removal of lower speed restrictions in various locations. The fastest tunnel running at present, I believe, is the Jubilee, who consistently reach 60 mi/h in certain places between Baker Street and Canning Town. The Vic I think reaches 50 mi/h consistently as well, and could probably do more if required. However the Picc with its trusty 73 stock is not far behind, with 45 mi/h consistently achieved in places, plus some faster running in certain sections like Heathrow T123 to T5. Where does the Northern hit 40 mph in the pipe, out of interest? Before the resignalling, this could just about be reached between Kennington and Waterloo n/b, and more regularly between East Finchley and Highgate s/b, just touched between Highgate and Archway s/b (literally only for a second or two!), and between Hendon Central and Colindale n/b. There were of course plenty of other locations where 40 mph could be illegitimately reached or exceeded! Under TBTC this is more or less the same, though trains can reach 40 mph on the n/b between Archway and East Finchley, and also going south in the Hendon tunnel. These are some of the very few locations where the speed profile is noticeably faster - there are still so many locations where speed has been reduced, in some cases considerably. |
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