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Post by Deleted on Nov 6, 2010 15:25:22 GMT
IIRC the 92TS is the smallest, due to the odd resizing of the old CLR tunnels.
And don't cross cars, it's not safe. I used to be reluctant to do it in Sydney, and we had a half-passageway (sorta bridge thingy) between the cars (outside the cars tho, not like the enclosed doored corridors of the new trains).
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metman
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Post by metman on Nov 6, 2010 15:58:55 GMT
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Post by t697 on Nov 6, 2010 16:29:51 GMT
Normal surface stock has wheels about 900mm in diameter (36" in old units!) So that'll be just C stock in a year and a half.... |
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metman
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Post by metman on Nov 6, 2010 16:37:48 GMT
and then nothing in 2 and half years......
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Post by 21146 on Nov 6, 2010 20:00:25 GMT
IIRC the 92TS is the smallest, due to the odd resizing of the old CLR tunnels. And don't cross cars, it's not safe. I used to be reluctant to do it in Sydney, and we had a half-passageway (sorta bridge thingy) between the cars (outside the cars tho, not like the enclosed doored corridors of the new trains). Who remembers when LT TTIs (Revenue) habitually used the communicating doors when checking trains? Certainly less dangerous than when LT hand-worked-door trains ran with sliding doors left open, and no-one recalls anyone falling out. As a Guard I regularly used them on moving trains, though the long overhang on the D Stock cars meant there were areas to be avoided (e.g. PG Sidings). Having said that, at least one passenger has been killed doing this (it is assumed, of course, since it couldn't be proved whether they were crossing between cars or attempting to access the platform) and this forum would not wish to encourage such behaviour today, which I believe is against the Conditions of Carriage anyway (BTW no pun intended there!). |
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Post by 100andthirty on Nov 6, 2010 21:20:14 GMT
I'm sure Tubeprune will be along soon and correct both the S stock and the 2009 ts wheel diameters. I need to check the facts, but the 2009ts bogie is virtually the same as the 1995ts bogie. thus I suspect it shares 770mm (new) wheels. Having seen S stock and '09ts bogies side by side there's no noticeable difference in wheel size. |
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Post by metrider on Nov 8, 2010 19:47:09 GMT
.... S stock 770mm new, 700mm scrap Funny the things that come to mind whilst being chauffeured up the Met on a Watford semi fast...  Do the trains take their speedometer reading from wheel revolutions? If so, as the wheels near the end of their service life, do the speedometers increasingly over read, limiting the speed of the train unnecessarily to comply with speed limits? 770mm->700mm is about 10% and would have a similar effect on actual speed w.r.t. indicated speed. |
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Post by 100andthirty on Nov 8, 2010 20:25:11 GMT
.... S stock 770mm new, 700mm scrap Funny the things that come to mind whilst being chauffeured up the Met on a Watford semi fast... Do the trains take their speedometer reading from wheel revolutions? If so, as the wheels near the end of their service life, do the speedometers increasingly over read, limiting the speed of the train unnecessarily to comply with speed limits? 770mm->700mm is about 10% and would have a similar effect on actual speed w.r.t. indicated speed. In today's wotld of technology, there's no reason why we shouldn't have either manual or automatic wheel diameter compensation. The earliest trains with electronic speedometers had the simple expedient of a knob to set the wheel diameter. Another method is to have two reference points on the track a set distance apart and to count the wheel revolutions between those points. This latter system is often used with ATP/ATO systems where absolute accuracy is essential. For manual driving, often the speedo is set to be accurate with the wheels half worn giving a +/-5% accuracy. I would have to check which of these is used for S stock |
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metman
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Post by metman on Nov 8, 2010 23:17:58 GMT
Please do it is an interesting question. Much time has indeed past since the fluid speedos of the R stock!!
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Post by Deleted on Nov 12, 2010 19:50:59 GMT
Why isn't one of them running now? I've been standing here long enough.
The vandals really did a number on this one.
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Post by t697 on Nov 12, 2010 21:17:34 GMT
In today's world of technology, there's no reason why we shouldn't have either manual or automatic wheel diameter compensation. The earliest trains with electronic speedometers had the simple expedient of a knob to set the wheel diameter. Another method is to have two reference points on the track a set distance apart and to count the wheel revolutions between those points. This latter system is often used with ATP/ATO systems where absolute accuracy is essential. For manual driving, often the speedo is set to be accurate with the wheels half worn giving a +/-5% accuracy. I would have to check which of these is used for S stock Currently using average diameter to save needing a maintenance activity to reset as wheels are turned. Perfectly suitable for current usage. Probably need one of the automated calibration methods as part of a new ATC scheme. We'll have to wait a little longer to find out... |
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Ben
fotopic... whats that?
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Post by Ben on Nov 15, 2010 16:39:35 GMT
Good punnage from a signalmeister  |
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Post by citysig on Nov 16, 2010 10:48:37 GMT
So yeah, you could say you got the wrong end of the stick slightly. Apologies. Now I have re-read your post a couple of times, and realised there was no sarcasm intended from the same angle that deadmans often comes from, I now see what you mean. Apologies again. |
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Post by Deleted on Nov 19, 2010 11:37:54 GMT
Lies! All lies!
Wikipedia said one was about to start at wembley park. So I got off there, went to the fast platform and stared puppy at the underpass as nothing emerged.
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metman
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Post by metman on Nov 19, 2010 12:05:01 GMT
Wikipedia is less reliable than the papers!!
They don't always run, its often due to availability of trains/staff/instructors etc..
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Post by Deleted on Nov 22, 2010 9:22:33 GMT
Between Harrow and Northwood. I've had a good view of them over the last year or so! Any pics? *hopeful kid look* |
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Post by daftbox on Nov 23, 2010 1:28:24 GMT
Please ignore my previous question - it's been sort-of answered in the 'New & Future Trains' section. (Knew I'd seen something before...)
Ta.
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Post by Deleted on Nov 27, 2010 20:21:37 GMT
Was your Amersham train going backwards?
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Post by greatcentral on Nov 28, 2010 0:38:34 GMT
Ah. My train was from Amersham which I neglected to say!
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Post by deadmans on Nov 28, 2010 18:46:58 GMT
but awful upholstery- very thin. Compared very badly with the Piccadilly line stock I travelled on later. REALLY? On London's perfect train? NEVER SIR! When i had the misfortune to take one of the sardine cans home this week, ITS STILL ANNOUNCING THE WRONG STATIONS, after it leaves the last one. ;D ;D, then at Northwood hills, all the DM doors cut out, and the punters had to sprint into the next car. So much for CCTV and PA to help people. Classic. ;D   |
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Post by londonstuff on Nov 28, 2010 19:15:56 GMT
but awful upholstery- very thin. Compared very badly with the Piccadilly line stock I travelled on later. REALLY? On London's perfect train? NEVER SIR! When i had the misfortune to take one of the sardine cans home this week, ITS STILL ANNOUNCING THE WRONG STATIONS, after it leaves the last one. ;D ;D, then at Northwood hills, all the DM doors cut out, and the punters had to sprint into the next car. So much for CCTV and PA to help people. Classic. ;D Sardine cans? It's longer than the A Stock and more room (to stand, I admit) although as they're not travelling in rush hour yet, I'm presuming you got a seat. For a forum that's for people with an interest in LU and, therefore, normally want things to go well, you're astonishingly negative. Maybe it'd be easier for you to set up an anti-LU forum and leave the rest of us in peace.  |
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Ben
fotopic... whats that?
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Post by Ben on Nov 30, 2010 8:04:04 GMT
So... opinions... rumour... info... discussion... cynacism... positivity... corporatespeak... nostalgia... enthusiasm. Could it be a... 'forum', Bob? Better a negative post about a topic than a negative one about a person.
I've yet to experience them in person, but I spend my time wondering what Graff-Baker would have designed had the technology and want existed in his day.
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Post by daftbox on Nov 30, 2010 13:25:38 GMT
Compared to A stocks, will the new trains be less likely to develop wheel flats - or take longer to do so?
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metman
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Post by metman on Nov 30, 2010 13:55:51 GMT
All wheels are powered so if they do there will be bom bom bom on every car!
They have sanding gear, but the Chilterns are unforgiving.....
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Post by phillw48 on Nov 30, 2010 15:33:10 GMT
Compared to A stocks, will the new trains be less likely to develop wheel flats - or take longer to do so? That depends on if they are equipped with ABS as most main line stock is fitted. |
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Post by Deleted on Nov 30, 2010 16:32:54 GMT
Compared to A stocks, will the new trains be less likely to develop wheel flats - or take longer to do so? That depends on if they are equipped with ABS as most main line stock is fitted. WSP mate ;D |
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Post by metrider on Nov 30, 2010 18:35:50 GMT
That depends on if they are equipped with ABS as most main line stock is fitted. WSP mate ;D Que?  |
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Post by metrailway on Nov 30, 2010 18:44:51 GMT
Que? heel Slip Protection sometimes also Wheel Slide Protection |
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metman
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Post by metman on Dec 16, 2010 7:46:08 GMT
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Post by deadmans on Jan 22, 2011 22:22:39 GMT
Another sardine can due to arrive next week.
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