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Post by Deleted on Feb 24, 2007 2:09:31 GMT
Traveling on a detour route back from London the other day. I thought i would hop on the vicc.
All i can say is the pulling power those 67ts's have is brilliant for older stock. Looking out the window as we pulled out the station i felt like i was on a tube sized bulliet train!!
So where does the 67ts match up in speeds?
Cheers James
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Post by Deleted on Feb 24, 2007 3:37:11 GMT
It's more likely the acceleration rates that you would be interested in to answer that question. The 92TS accelerates at approx 1.15ms2 in the tunnel sections. Unfortunately I don't know the figures for the 67TS, but I'm sure that it would be significantly less than the figures for the 92TS. The automatic driving on the Victoria Line does give the impression of very fast acceleration though.
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Post by Deleted on Feb 24, 2007 7:03:58 GMT
As Stephen says, the basic answer to the question is 'no' - but the Vic has a few aspects which can even the running style out as opposed to the Central. The Vic, being built in the 1960's, was purpose built with no sharp curves or severe gradients, meaning trains can use faster speeds more of the time. Also (I think) every platform is straight and trains can approach/leave these quicker also. It is a very quick line (Brixton - Wal in 35 mins - try that by road ). The 92's have the advantage of having all of their axles motored. Imagine a 67 with the same - it'd be a very fast train. The EP braking on a 67 is very good also. As for speeds, I think the fastest a 67 in service will go is around 47.5 mph, while a 92 will do 85 kph - or 52.8 mph. The 92's used to so 100 kph - 62.5 mph - but this was restricted after the Chancery Lane derailment. One stock not to forget about is the 96's - even though they're not ATO yet they're quick - I've been on the front of one along the extension doing 58 mph With ATO this will also be a very fast line. Don't forget the new 09's - those things will be mental. I hope a few examples of 1967 stock survive, they've served an incredibly busy line well for 40 years
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Post by Deleted on Feb 24, 2007 8:10:11 GMT
One stock not to forget about is the 96's - even though they're not ATO yet they're quick - I've been on the front of one along the extension doing 58 mph With ATO this will also be a very fast line. Don't forget the new 09's - those things will be mental. I hope a few examples of 1967 stock survive, they've served an incredibly busy line well for 40 years All new stock are likely to have pretty much the same performance characteristics, as the max acceleration/decceleration rates are now limited by passenger comfort as opposed to being limited by technology. Standing passengers cannot withstand acceleration and decceleration rates of over approx 1.3ms2 without there being a rapidly increasing chance of falling over. Thus 1.2-1.4ms2 are typical emergency braking rates, and 1.0-1.2ms2 being typical service acceleration and braking rates on modern metro trains.
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Post by Deleted on Feb 24, 2007 8:16:28 GMT
All new stock are likely to have pretty much the same performance characteristics, as the max acceleration/decceleration rates are now limited by passenger comfort as opposed to being limited by technology. Standing passengers cannot withstand acceleration and decceleration rates of over approx 1.3ms2 without there being a rapidly increasing chance of falling over. Thus 1.2-1.4ms2 are typical emergency braking rates, and 1.0-1.2ms2 being typical service acceleration and braking rates on modern metro trains. Ah....I see! Thanks for that post SK, I never realised this limited what could be done. Looking at it now it makes sense, but it's never occurred to me before.
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Phil
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Post by Phil on Feb 24, 2007 10:40:00 GMT
Indeed, something most of us don't even think about, but engineers get paid to consider.
But, taking sk's figures for emergency braking, this gives a distance of just over 230ft for an emergency stop from 30mph: is it really that far? I'm sure I've seen'em pull up sharper when someone went down in front of a train (accident fortunately not jumper, and train stopped before it hit him). Or is 1.3m/s2 maximum service, with a bit extra if the handle is dropped?
1.3 is only 1/8 'g': considering fairground rides go up to about 4'g' in places I'd have thought the idea of tipping over a few standees to save lives in an emergency is a good cost/benefit ratio.
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Post by Deleted on Feb 24, 2007 12:55:10 GMT
I'd have thought the idea of tipping over a few standees to save lives in an emergency is a good cost/benefit ratio. I would agree.
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DrJimi
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Post by DrJimi on Feb 24, 2007 15:45:42 GMT
Per anecdotal information (gleaned from our team experts during MSTS train physics modeling), the D78 accelerates on the flat at 1.0m/s^2 (initially, before aero drag, rail friction and motor characteristics lower that), and the D78/73TS and most others (6-car) can stop within their own length from 30mph in Brake 3 (or equivalent).
I just ran a test in our MSTS D78 equiped with digital test readouts in the cab, and Brake 3 applies 143KN total brake force for a decel of -1.15m/s^2. Emergency is about 1.32m/s^2. That's with accurate train weight plus about 50% passenger loading. I realize this is simulation, but feedback from our test I/Ops suggests this is very close to reality.
/Jimi
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Post by Deleted on Feb 24, 2007 19:27:36 GMT
Hi guys,
Thanks for all the info. But i have decided that the 67ts is in it's self an experience to ride! It maybe slower than other stocks slightly perhaps but as it's so old it gives you a sort of unsteadyness feeling!!
Cheers James
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Post by Deleted on Feb 24, 2007 19:44:12 GMT
But, taking sk's figures for emergency braking, this gives a distance of just over 230ft for an emergency stop from 30mph: is it really that far? That does seem quite far. For a D stock at approx 360 feet long that is about 2/3rds of a train length. Considering that at 30mph I would expect it to stop comfortably within a train length in Service 3, I'm surprised emergency isn't stronger than that. It certainly feels stronger!
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Post by 1996 on Mar 13, 2007 17:25:51 GMT
i can't say i like the 67TS much, although granted, it has served well... the 92TS... great stuff!! but the Wimbledon Trams.. i hate them anyway but they have too violent accelleration for comfort... the amount of times i have been on one and someone has fallen over and caused delay to the service and damage to themselves.
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Post by Deleted on Mar 13, 2007 21:15:17 GMT
the 92TS... great stuff!! That's what we like to hear
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Post by Deleted on Mar 15, 2007 1:18:52 GMT
58mph on a 96TS? Whenever I rode them, they felt much slower than the 92TS in acceleration so I was under the impression they too, were de-tuned like the 95s on the Northern. I was always under the impression that the 67TS has around the same performance as the 73TS (which incidentially loses to the D stock on a drag race). The 67 will never match the 92...you need to take a ride up to Epping one day to feel the speed!
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Post by Deleted on Mar 15, 2007 19:26:27 GMT
58mph on a 96TS? Indeed, on the extension going eastbound.
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Post by Deleted on Mar 15, 2007 19:29:34 GMT
Just remembered - in post 2 of this thread, I state a 92 will do 85kph.......I believe this to be the case in Auto. I'm led to believe that in Coded Manual the 100 kph can still be achieved.
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Post by edb on Mar 15, 2007 19:34:51 GMT
100K's, blimey, I'd like to see and be in that. That sounds fun!!!!!!!!
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Post by Deleted on Mar 15, 2007 20:08:45 GMT
100K's, blimey, I'd like to see and be in that. That sounds fun!!!!!!!! Not East from EAB you won't!
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Post by edb on Mar 15, 2007 20:33:40 GMT
100K's, blimey, I'd like to see and be in that. That sounds fun!!!!!!!! Not East from EAB you won't! Booooooooo!!!!!!!!!!!!!!!!!!!!!!!!
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Post by Deleted on Mar 25, 2007 5:11:13 GMT
Whats a hundred K's when were at home?? Speak English man!
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Post by Deleted on Mar 25, 2007 8:21:31 GMT
Whats a hundred K's when were at home?? Speak English man! 100 kph is about 62.5 mph
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Post by Deleted on Mar 25, 2007 8:30:32 GMT
Standing passengers cannot withstand acceleration and decceleration rates of over approx 1.3ms2 without there being a rapidly increasing chance of falling over. Hmmm - I wish someone would tell this to the bus drivers in London!
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Chris M
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Post by Chris M on Mar 25, 2007 15:09:56 GMT
Whats a hundred K's when were at home?? Speak English man! For many simple conversions, just ask Google - e.g. search for: 100km/h in mph Alternatively to convert between any pair of units (except currency) I've not found anything better than onlineconversion.com. For currency conversion then xe.com/ucc is the best there is in my opinion. It only does live rates - i.e. what €1 is in £ at the moment. I've not found any site that gives historical rates, e.g. what €1 was worth in £ in 2001 or what £1 in 1920 is worth in £ today.
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Post by tubeprune on Mar 25, 2007 16:13:01 GMT
I've not found any site that gives historical rates, e.g. what €1 was worth in £ in 2001 or what £1 in 1920 is worth in £ today. Try: eh.net/hmit/
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Chris M
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Post by Chris M on Mar 25, 2007 16:35:02 GMT
Excellent thank you Tubeprune!
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Post by trc666 on Apr 2, 2007 21:32:43 GMT
Well the best way of seeing if a 67 is faster than a 92 is send one along the West Ruislip branch, 92s usually give it a bit of welly along there. Theydon Bois to Epping is another one, but 67s do not have high lift shoegear to get there via Liverpool Street.
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Tom
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Post by Tom on Apr 2, 2007 21:37:12 GMT
Indeed, something most of us don't even think about, but engineers get paid to consider. But, taking sk's figures for emergency braking, this gives a distance of just over 230ft for an emergency stop from 30mph: is it really that far? I'm sure I've seen'em pull up sharper when someone went down in front of a train (accident fortunately not jumper, and train stopped before it hit him). Or is 1.3m/s 2 maximum service, with a bit extra if the handle is dropped? 1.3 is only 1/8 'g': considering fairground rides go up to about 4'g' in places I'd have thought the idea of tipping over a few standees to save lives in an emergency is a good cost/benefit ratio. Only just seen this, but to give an indication: The brake rate for speed checks should have a deceleration rate of between 0.7 and 0.9m/s/s. Service braking is counted as 1.0m/s/s Emergency Braking Performance is 1.3m/s/s (tunnel) and 1.15m/s/s (outside). I don't think the problem is related to people tripping over but more with what could happen in a full train (potential for crush injuries etc). 100K's, blimey, I'd like to see and be in that. That sounds fun!!!!!!!! Not East from EAB you won't! Most definately not - considering I'm the one doing the driving (or at least the Data I prepared is...) Well the best way of seeing if a 67 is faster than a 92 is send one along the West Ruislip branch, 92s usually give it a bit of welly along there. Theydon Bois to Epping is another one, but 67s do not have high lift shoegear to get there via Liverpool Street. Haven't the earlier posts in this thread confirmed the difference in maximum speed between the two stocks?
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Oracle
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Post by Oracle on Apr 2, 2007 21:51:00 GMT
Just to remind the 1980 Auto Tube Rambler took an 8-car 1967 Stock on the Central. I don't remember it travelling incredibly fast though up to the "loop". Contrast that with the 1959 Stock tour that was driven in places with "Welly" especially down hill into the tunnels and on one occasion I swore we were going to come off the rails. I
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Post by Deleted on Apr 2, 2007 22:13:19 GMT
Just to remind the 1980 Auto Tube Rambler took an 8-car 1967 Stock on the Central. I don't remember it travelling incredibly fast though up to the "loop". Contrast that with the 1959 Stock tour that was driven in places with "Welly" especially down hill into the tunnels and on one occasion I swore we were going to come off the rails. I have a bit of my post missing! THIS THREAD is a good place to find info on the 1967TS and its speeds.
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Ben
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Post by Ben on Apr 8, 2007 13:18:27 GMT
The best contender in the future would possibly be the 1995ts, after the increase to 750volts
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Post by Deleted on Apr 8, 2007 14:04:48 GMT
Another thing I thought about emergency brake rates - is there a physical limitation?
There's always talk about wheel lockups/flatspotting in rain on the Central Line under ATO so maybe, increasing the deceleration rate is actually not feasible due to physics itself.
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