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Post by jamesb on Mar 3, 2018 22:19:14 GMT
I was wondering which LU rolling stock (if any) is best adapted to run in freezing / icy / snowy conditions.
The 1992ts seems to have brushes which can be mechanically lowered onto the current rails to brush away snow / ice, a feature which I haven't observed on the 1995/6 stock.
On the Jubilee line, I saw a few trains with blue lights (? deicer units).
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Post by superteacher on Mar 3, 2018 22:22:38 GMT
I seem to recall that a 1992 stock train was sent to a cold country for testing.
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Post by domh245 on Mar 3, 2018 22:22:52 GMT
I think that deicing units and sleet brushes are common to all fleets.
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Post by Dstock7080 on Mar 3, 2018 23:22:08 GMT
I think that deicing units and sleet brushes are common to all fleets. Not sure that the '09 Stock fleet includes de-icing cars or whether they are fitted with sleet brushes. |
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Post by jamesb on Mar 3, 2018 23:24:50 GMT
There seemed to be a lot of deicing units on the Jubilee line, more than I have observed on the Central line. Based on my visit to Stratford - I saw at least 3 trains with blue lights - maybe it was just a coincidence.
The 1992 stock, for all its faults, seemed to handle the cold weather quite well (apart from the first day of snow). A bit of drizzle on the other hand and the ATO has a meltdown!
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Post by piccboy on Mar 3, 2018 23:26:10 GMT
I think that deicing units and sleet brushes are common to all fleets. Not sure that the '09 Stock fleet includes de-icing cars or whether they are fitted with sleet brushes. In theory they would still need to de-ice all the roads leading into and out of the depot as well as all the outdoor stabling roads. Wonder if they do them manually? |
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Deleted
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Post by Deleted on Mar 4, 2018 8:23:00 GMT
Not sure that the '09 Stock fleet includes de-icing cars or whether they are fitted with sleet brushes. In theory they would still need to de-ice all the roads leading into and out of the depot as well as all the outdoor stabling roads. Wonder if they do them manually? Slightly off topic, but when ordered, I don't think they even had window wipers (09ts). The roads to the depot were forgotten about. |
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Post by superteacher on Mar 4, 2018 8:40:31 GMT
In theory they would still need to de-ice all the roads leading into and out of the depot as well as all the outdoor stabling roads. Wonder if they do them manually? Slightly off topic, but when ordered, I don't think they even had window wipers (09ts). The roads to the depot were forgotten about. That’s unbelievable! |
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Post by spsmiler on Mar 4, 2018 20:33:30 GMT
I've published on my Flickr photostream some winter 2017 / 2018 snow weather photos... most of these are based on the Central Line in the Newbury Park area. The most recent images date from Wednesday and Friday last week (28th Feb & 2nd March 2018) I think that over 20 is too many to show them all here, so I'm just showing two of them. My photos can be reached at the first link below, which leads to my photostream - if you scroll down (past the buses) you will also see some other photos of tube train interest, plus something related to Crossrail / Elizabeth Line that perhaps TfL did not want the public to see (yet!). www.flickr.com/photos/citytransportinfo/with/39900590774/  Northbound 1992ts in snow - note the sparks / arcing as the power supply pick up shoes struggle to collect power from the live rail. The location is north of Newbury Park station, this was filmed from a pedestrian footbridge over the railway. This is a still image from HD video.  Heated pointwork at the northern end of the siding loop near Newbury Park station. Filmed from where Perrymans Farm Road passes over the railway. I have also made a YouTube film showing trains at Stratford in snowy weather last week. I was intending to go to Croydon to make a film showing trains, trams and buses in the snow but it started snowing heavily and then I heard about points trouble disrupting Overground services, so not wanting to join the many people who experienced disrupted journeys I stayed at Stratford instead. The YouTube can be seen here: Enjoy! Simon |
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Post by firestorm on Mar 5, 2018 22:25:27 GMT
I was wondering which LU rolling stock (if any) is best adapted to run in freezing / icy / snowy conditions. The 1992ts seems to have brushes which can be mechanically lowered onto the current rails to brush away snow / ice, a feature which I haven't observed on the 1995/6 stock. On the Jubilee line, I saw a few trains with blue lights (? deicer units). Hard to say which rolling stock is best adapted, however the S-Stock has a few tricks up its sleeve to prevent adverse weather conditions from impacting it too much. For example, there is an "ice mode" that can be selected by the train operator so the train can cope with higher than normal electromagnetic interference from arcing due to ice (under normal conditions, this would flag up as a fault and cause traction faults). Furthermore the first 2 cars maintain a set level of current draw so that arcing is maintained to melt the ice. Combination of an air dryer and heating element prevents moisture/water from entering the air system so stops it from freezing inside the tanks/pipes. I think that deicing units and sleet brushes are common to all fleets. Not sure that the '09 Stock fleet includes de-icing cars or whether they are fitted with sleet brushes. No de-icing cars or sleet brushes are fitted. Not sure that the '09 Stock fleet includes de-icing cars or whether they are fitted with sleet brushes. In theory they would still need to de-ice all the roads leading into and out of the depot as well as all the outdoor stabling roads. Wonder if they do them manually? All the outdoor stabling roads have roofs apart from the staff train platforms, but yes the roads which lead in and out of the depot are done manually. |
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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 Mar 13, 2018 22:37:49 GMT
Q and standard stock was probably the best for working in icy weather. they had through bus line jumpers for the traction supply, and motormen who knew how to drive them instead of relying on computers for everything. No juice? Computer says no go...
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Post by jamesb on Mar 18, 2018 22:10:28 GMT
Today I caught a train Westbound from Woodford in the late afternoon. We were delayed at each station to Leytonstone, and the doors were taking a long time to close.
A '? train maintainer' had a look at Leytonstone and the doors were opened and closed several times during this process.
When we pulled out of Leytonstone, the driver announced that the train was not long out of the depot, and the air in the doors was very cold, causing them to close slowly.
I had not considered that before, but it makes sense that air pressured mechanisms might not work as well in the cold, if the pressure goes down.
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Post by Dstock7080 on Mar 18, 2018 23:23:18 GMT
Moisture in the air system would be very cold and prone to freeze, not necessarily the low pressure.
The compressors would still pump the air up to the correct operating pressure.
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Post by Deleted on Mar 19, 2018 18:21:06 GMT
72TS is prone to having doors freeze. As the train warms up, various doors open at different speeds.
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Post by firestorm on Mar 19, 2018 19:40:49 GMT
Today I caught a train Westbound from Woodford in the late afternoon. We were delayed at each station to Leytonstone, and the doors were taking a long time to close. A '? train maintainer' had a look at Leytonstone and the doors were opened and closed several times during this process. When we pulled out of Leytonstone, the driver announced that the train was not long out of the depot, and the air in the doors was very cold, causing them to close slowly. I had not considered that before, but it makes sense that air pressured mechanisms might not work as well in the cold, if the pressure goes down. There is also a chance that water is in the air tanks, therefore reducing the normal capacity of the tanks, this would in turn reduce the volume of air available to operate the doors even at the same operating pressure. |
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