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Post by M1104 on Apr 22, 2014 20:37:27 GMT
Notice the other day at Colliers Wood that the trains are now quicker, Jubilee-style. However, when in the tunnels the trains tend to 'stab the throttle' a lot rather than having smooth constant acceleration. They also appear to be speed restricted, considering that the tunnels between Morden and Clapham South don't have any sharp bends that I am aware of, the first bend being just before Clapham Common on the northbound northern line.
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Post by M1104 on May 28, 2014 14:39:17 GMT
........Continuing on with the discussion from the 'My bus journey today' thread, if the speed restrictions are going to be permanent (even if only on some sections) then the journey reduction times will not differ that much from under manual operation. I travel on the Morden leg of the northern line, where the tunnels are for the most part pretty straight (barring Clapham Common, Clapham North and South Wimbledon where the tunnels bend the most) and was a bit surprised that they do not accelerate a bit quicker along the Kennington – Morden stretch.
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Post by paulsw2 on May 29, 2014 8:58:39 GMT
The Northern line is not quite completely ATO yet the Chalk Farm to Edgware section has its final testing over this weekend 31/1 May/June if all goes according to plan it will go live over the weekend at some point. Once it has been commissioned there should be tweaks to the software if you were talking about southbound journeys Morden depot is NOT auto and trains have to be driven in restricted manual(slow speed) into and out of depot. So the software/signalling system tries to create even headways where possible
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Post by M1104 on May 29, 2014 9:11:21 GMT
Notice the other day at Colliers Wood that the trains are now quicker, Jubilee-style. However, when in the tunnels the trains tend to 'stab the throttle' a lot rather than having smooth constant acceleration. They also appear to be speed restricted, considering that the tunnels between Morden and Clapham South don't have any sharp bends that I am aware of, the first bend being just before Clapham Common on the northbound northern line. The other bend being at South Wimbledon, where the actual platform is on a slight curve, though nothing as sharp as embankment on the northern line or Waterloo on the Bakerloo line.
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Post by M1104 on May 29, 2014 9:16:54 GMT
The Northern line is not quite completely ATO yet the Chalk Farm to Edgware section has its final testing over this weekend 31/1 May/June if all goes according to plan it will go live over the weekend at some point. Once it has been commissioned there should be tweaks to the software if you were talking about southbound journeys Morden depot is NOT auto and trains have to be driven in restricted manual(slow speed) into and out of depot. So the software/signalling system tries to create even headways where possible Thanks on that. I thought that trains would be driven in manual mode into the depots anyway. Does that mean that high Barnett and Finchley depots are automated all the way into the sheds/train wash? I forgot about the Edgeware branch not yet fully activated, will certainly be checking out the line once it's 100% on ATO. Do you know when the software adjustments will be done at the Morden depot?
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Post by paulsw2 on May 29, 2014 21:17:26 GMT
I am not sure about the northern depots as I work on a manually driven line but even if a depot was ATO equipped the trains would still need to use restricted manual for safety issues with cleaners and train technicians about
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Post by M1104 on Apr 9, 2015 23:48:02 GMT
Have noticed that trains on the High Barnet branch now have faster cruising speed without the constant throttle stabbing the ATO initially did. Overall not quite as fast as the Jubilee Line's peak speed, but not far from it.
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Post by Connor on Apr 9, 2015 23:57:01 GMT
Have noticed that trains on the High Barnet branch now have faster cruising speed (and without the constant throttle stabbing the ATO initially did). Overall not quite as fast as the Jubilee Line as it's best, but catching up. The Jubilee Line ATO system is not that fast. There's always a long pause between the doors closing and the train actually moving. Compared to the Victoria Line's ATO, where the train flies out of the station the instant the doors close. I love how the doors on the Vicky Line open before the train has completely stopped. You get that on some of the older trains too.
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Post by M1104 on Apr 10, 2015 1:03:18 GMT
Have noticed that trains on the High Barnet branch now have faster cruising speed (and without the constant throttle stabbing the ATO initially did). Overall not quite as fast as the Jubilee Line as it's best, but catching up. The Jubilee Line ATO system is not that fast. There's always a long pause between the doors closing and the train actually moving. Compared to the Victoria Line's ATO, where the train flies out of the station the instant the doors close. I love how the doors on the Vicky Line open before the train has completely stopped. You get that on some of the older trains too. Yes I was amazed at how quick the Victoria Line trains start moving, almost the instant the doors are shut. But besides that they seem just as fast as each other. The Jubilee Line I find hits the maximum speed allowed between: London Bridge-Bermondsey Canada Water-Canary Wharf Canary Wharf-North Greenwich On the surface level I believe it's at its fastest when passing neasden depot With the victoria line the best thrashing tends to be between: Stockwell - Vauxhall Kings Cross - Highbury & Islington Finsbury Park - Seven Sisters* * - possibly the longest stretch of tunnel between two LU stations as the train is going fast on an appearantly down slope yet still takes quite a bit of time to reach Sisters. Back to the Northern Line I don't think it's quite yet up to its capable optimum speed. Certainly isn't yet on the Morden leg.
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Post by vjaska on Apr 10, 2015 1:14:58 GMT
The Jubilee Line ATO system is not that fast. There's always a long pause between the doors closing and the train actually moving. Compared to the Victoria Line's ATO, where the train flies out of the station the instant the doors close. I love how the doors on the Vicky Line open before the train has completely stopped. You get that on some of the older trains too. Yes I was amazed at how quick the Victoria Line trains start moving, almost the instant the doors are shut. But besides that they seem just as fast as each other. The Jubilee Line I find hits the maximum speed allowed between: London Bridge-Bermondsey Canada Water-Canary Wharf Canary Wharf-North Greenwich On the surface level I believe it's at its fastest when passing neasden depot With the victoria line the best thrashing tends to be between: Stockwell - Vauxhall Kings Cross - Highbury & Islington Finsbury Park - Seven Sisters* * - possibly the longest stretch of tunnel between two LU stations as the train is going fast on an appearantly down slope yet still takes quite a bit of time to reach Sisters. Back to the Northern Line I don't think it's quite yet up to its capable optimum speed. Certainly isn't yet on the Morden leg. I'd say Kings Cross to Caledonian Road is quite a long stretch of tunnel along with Hatton Cross to Heathrow Terminals 12&3.
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Post by paulsw2 on Apr 10, 2015 2:26:32 GMT
Yes I was amazed at how quick the Victoria Line trains start moving, almost the instant the doors are shut. But besides that they seem just as fast as each other. The Jubilee Line I find hits the maximum speed allowed between: London Bridge-Bermondsey Canada Water-Canary Wharf Canary Wharf-North Greenwich On the surface level I believe it's at its fastest when passing neasden depot With the victoria line the best thrashing tends to be between: Stockwell - Vauxhall Kings Cross - Highbury & Islington Finsbury Park - Seven Sisters* * - possibly the longest stretch of tunnel between two LU stations as the train is going fast on an appearantly down slope yet still takes quite a bit of time to reach Sisters. Back to the Northern Line I don't think it's quite yet up to its capable optimum speed. Certainly isn't yet on the Morden leg. I'd say Kings Cross to Caledonian Road is quite a long stretch of tunnel along with Hatton Cross to Heathrow Terminals 12&3. The Vic line is geared up for 50mph running near enough throughout the northern end of the met has a few places where 60mph can be reached the district/circle h&c max speed where permitted is 45mph
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Post by M1104 on Apr 10, 2015 6:52:36 GMT
I'd say Kings Cross to Caledonian Road is quite a long stretch of tunnel along with Hatton Cross to Heathrow Terminals 12&3. The Vic line is geared up for 50mph running near enough throughout the northern end of the met has a few places where 60mph can be reached the district/circle h&c max speed where permitted is 45mph Do the Met Line actually reach as fast as 60mph in practice? I would of bought with it still being in manual mode it may still be governed.
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Post by daveb0789 on Apr 10, 2015 8:26:27 GMT
I've had a cab ride in a Northern line tube train. 50 mph can be reached in places albeit very briefly. They seem quicker than the Victoria line. Official top speed of metropolitan line s stock trains is 100 kph / 62 mph.
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Post by snoggle on Apr 10, 2015 8:50:57 GMT
The Vic line is geared up for 50mph running near enough throughout the northern end of the met has a few places where 60mph can be reached the district/circle h&c max speed where permitted is 45mph Do the Met Line actually reach as fast as 60mph in practice? I would of bought with it still being in manual mode it may still be governed. Not sure what the limit is these days but many years ago I had a cab ride in A Stock from Amersham and we saw 70 mph on the clock. I think problems with the track quality and bogies saw a lower limit imposed a few years later.
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Post by daveb0789 on Apr 10, 2015 19:02:47 GMT
I've only seen 50 mph boards in place on the Metropolitan line as the A stock were officially limited to 50. The higher speed of 60 mph is permitted on the 'fast lines' shared with Chiltern trains but until the S stock arrived only Chiltern could go at that speed.
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