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Post by jardine01 on May 2, 2011 18:38:53 GMT
Does anybody know which is the fastest underground line, i would say the fastest ones are Jubilee, Central and victoria line and the slowest i would say is the Northern line and the Sub suface lines exept the Metropolitan line which used to travel up to 70mph however they rearly go over 50 mph these days.
I dont know the offical fastest line could anybody help please?
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Post by Deleted on May 2, 2011 19:04:42 GMT
Rarely go over 50? LOL.
I'd say the Jubilee Jubilee is fastest, the Met coming in second.
I've clocked an A stock doing 65 up the Met and from experience my GPS is very accurate with speed if not reading slightly under... but they aren't supposed to do that.
The Jubilee is blazingly fast through some of the JLE sections when under TBTC.
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Post by jardine01 on May 2, 2011 19:13:45 GMT
Yes, the Jubilee line will be the fastest as it can do speeds of 62mph and now its in ATO all trains will be quicker. However when the Jubilee line was in manual i still thought they were pritty quick. The S stock is limited to 50mph am sure. It must be pritty terrifying traveling at 70mph on a A stock!
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metman
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Post by metman on May 2, 2011 19:17:35 GMT
The S stock design speed is 62mph but it is capped to enable safe working within the current signalling system...
see earlier thread......
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Post by Deleted on May 2, 2011 19:27:38 GMT
Yes, the Jubilee line will be the fastest as it can do speeds of 62mph and now its in ATO all trains will be quicker. However when the Jubilee line was in manual i still thought they were pritty quick. The S stock is limited to 50mph am sure. It must be pritty terrifying traveling at 70mph on a A stock! ATO itself doesn't make it quicker. The new signalling system allows the trains to work at their full potential rather than to a fixed signalling system designed for the performance curves of something like 72ts or on the north end of the line probably older on the old signals! TBTC has a constant calculation of overlap based on the speed. That means that a train going slower can come closer to the train ahead, and also means that they can reach fast speeds without having to worry about compromised overlaps or signal placement. That's the beauty of moving-block signalling, and will most certainly benefit the S stock when it is installed on the SSL - hopefully much better than the current crawl that is the SSL in the central area! |
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Post by Deleted on May 2, 2011 20:04:27 GMT
Jubilee in my experience can be pretty fast too, In manual mode between Neasden and Wembley its common to over-take an A stock and fly over the old bull head points into Wembley Park, lots of fun.
Also between St Johns Wood and Baker St where there is a long section to get up alot of speed because theres a downhill gradient, then pass the ventiliation shaft at speed, lots of fun!
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Post by Deleted on May 2, 2011 20:54:57 GMT
I've found the Central line more likely to operate at full speed (53 mph). The Jubilee line trains only seem to go fast if they are running late and AFAIK their drivers have no control over whether the ATO makes the train go 'slow' or 'fast'.
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Post by plasmid on May 2, 2011 21:33:23 GMT
Yes, the Jubilee line will be the fastest as it can do speeds of 62mph and now its in ATO all trains will be quicker. However when the Jubilee line was in manual i still thought they were pritty quick. The S stock is limited to 50mph am sure. It must be pritty terrifying traveling at 70mph on a A stock! 96ts is rated for a top speed of 75mph not 62mph like the 92ts or the S Stock. However that doesn't mean they will ever do 75mph or there is any benefit from having a higher top speed, especially on a line which doesn't run out far like the Central or Metropolitan where top speed would be more beneficial. Trains running at a lower speed are allowed closer to the train in front. In todays world it's about the frequency and not the top speed. |
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Post by Deleted on May 3, 2011 19:01:57 GMT
I've found the Central line more likely to operate at full speed (53 mph). The Jubilee line trains only seem to go fast if they are running late and AFAIK their drivers have no control over whether the ATO makes the train go 'slow' or 'fast'. That's simply because the timetable is for lower performance operation. Come full-line ATO and then the following timetable, things should really pick up pace. |
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Post by jardine01 on May 5, 2011 17:12:54 GMT
Jubilee line trains only seem to go fast if they are late, i know this is because of the old timetable. Hopefully the new timetable will make trains much faster and less of the on off power like at the moment which is really uncofortable and annyoing when standing up!
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Post by metrailway on May 5, 2011 21:48:23 GMT
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Post by Deleted on May 5, 2011 22:03:44 GMT
Bloody hell, how bouncy would that have been?!
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Ben
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Post by Ben on May 6, 2011 5:24:46 GMT
100 is pushing it, 85ish though...
Its a pity a speed attempt was never set. As we know a 5Wes holds the speed record for a third rail EMU at 108mph, and A stock holds it for fourth rail at 70mph. However if an extra 15mph could be added to that it'd be a matter of prestige for LT. However would show up the S stock...
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Oracle
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Post by Oracle on May 6, 2011 7:18:03 GMT
As I mentioned too many times, on the D78 Stock Metroliner tour the train was given the 'welly' on the Met and 70mph, the road speed at the time, was attempted and I think achieved.
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Post by Deleted on May 7, 2011 22:07:35 GMT
A stock has definitely unofficially done 80mph before.
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roythebus
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Post by roythebus on May 11, 2011 15:06:13 GMT
I doubt that an A stock could do much more than 80 because once the motors turn at a certain speed, the back electromotive force (back emf) will prevent them turning any faster.
The only way round that is to introduce a further weak field or shut off power and let gravity do the rest! Q stock would overtake LTS trains at times when running empty from Upminster at speed.
As for the 4WES doing 108, it was possible with a CEP/VEP combination on the Portsmouth direct line. I speak from experience.
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Post by trc666 on May 11, 2011 16:04:03 GMT
Didn't a class 377 get up to 110 on the Southern Speed Run back in 2005 (London to Brighton non-stop)?
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Post by Deleted on May 12, 2011 8:42:01 GMT
Its steeply downhill at 1/100 from Amersham to Rickmansworth. I would hazard a guess its possible to hit 80 using gravity on an A stock! AFAIK 100 mph was the most reached on the Brighton record run. The long downhill stretch from Worting Junction to Eastleigh makes triple figure top speeds a reality for slam door EMUs on the South West.
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Post by phillw48 on May 12, 2011 9:43:27 GMT
What is the fastest third/fourth rail electric? There must be a limit before the likelihood of damage to the collector equipment or even the current rails themselves.
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Post by Deleted on May 12, 2011 10:00:33 GMT
Fourth rail is for tubes so its tube train speed - and third rail is obviously used on the majority of routes in Southeastern England. 100 mph is the usual maximum line speed for 3rd rail but there arent that many stretches authorised for it.
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Post by norbitonflyer on May 12, 2011 21:53:53 GMT
What is the fastest third/fourth rail electric? There must be a limit before the likelihood of damage to the collector equipment or even the current rails themselves. - 20-odd miles - in 70 seconds: about 1000mph |
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Post by Deleted on May 13, 2011 19:24:54 GMT
What is the fastest third/fourth rail electric? There must be a limit before the likelihood of damage to the collector equipment or even the current rails themselves. - 20-odd miles - in 70 seconds: about 1000mph That's more like it, much better than the proposed 57 minutes! |
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Post by Deleted on May 13, 2011 20:52:51 GMT
Didn't a class 377 get up to 110 on the Southern Speed Run back in 2005 (London to Brighton non-stop)? It did indeed!!! Make it in a shade over 30 minutes or so! |
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Post by Deleted on May 14, 2011 1:00:56 GMT
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roythebus
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Post by roythebus on May 17, 2011 21:14:45 GMT
On the Portsmonth Direct line, leaving Haslemere on the up, open up, get to the top of the bank at about 40mph, then shut off. On a non-stop to Guildford, the train could easily reach 100 between Witley and Godalming. Brake for the 60 at Godalming, speed would still be 60 for Shalford Junction, then coast through the tunnel and brake for Guildford.
Keep power on, and it was possible to do over the ton at Witley.
On the down, it was possible to do over the ton at Liss.
Otherwise, top whack for A stock in the 1970s was about 80 on a good day, then, as I said earlier, the back emf would prevent further speed.
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Post by Deleted on May 17, 2011 21:51:25 GMT
Do you still drive that line? I thought the line speed was 90 and OTMR has made overspeeding a thing of the past.
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Post by Deleted on May 17, 2011 22:02:34 GMT
OTMR is just a recording device isnt it?
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Post by Deleted on May 17, 2011 22:14:18 GMT
Yes that's right.
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roythebus
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Post by roythebus on May 18, 2011 7:27:54 GMT
Do you still drive that line? I thought the line speed was 90 and OTMR has made overspeeding a thing of the past. No, BR and I parted company in 1988, so all my runs were done with "proper" trains, VEP,CEP etc. On the mail line, the REPs were capable of over 100mph. 3300hp for a 4 car unit was quite a bit of power, a bit like a Deltic..sorry, going off thread there! I can't comment on OTM etc as it wasn't invented in 1988. |
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Post by Deleted on May 18, 2011 8:10:31 GMT
I respect drivers of the proper slam door trains - as a driver of something very plastic myself. OTMR means we daren't speed at all. A random download will show everything. On the plus side line speeds have been improved and your run of the mill 4 car unit has a theoretical 2000 hp available compared with the 1000 hp of a VEP. I don't count REPs as they were designed as tractor units to push / pull 2 * 4TCs.
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