Deleted
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Post by Deleted on Jan 14, 2013 11:55:31 GMT
Seeing de-icers in use this morning (I presume that's what the blue light signifies), I wondered what are the rules and procedures for using them?
Are they activated by the driver or automatically? How often and for how long do they need to be used? And considering that not all trains have de-icing capability, how is the deployment of trains worked out to ensure that each branch gets a frequent enough service of de-icing trains?
Finally, as other lines such as the Central and Piccadilly both have considerable amount of surface track mileage, what steps are needed to keep these lines de-iced?
Just wondering..
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Post by Dstock7080 on Jan 14, 2013 12:59:04 GMT
De-icing is authorised when the ambient rail temperature, sensor at Amersham i believe, falls low.
This is passed to Line Controllers and then station staff who then display "D-On" boards. A message is given via the train radio to drivers.
De-icing boards are usually from the first station inside a tunnel, so that fluid is deposited from the tunnel mouth. i.e: District at Upney, Bow Road, Stepney Green, Aldgate East, Earl's Court, Parsons Green, Acton Town, Ealing Broadway.
The equipment on trains is turned on/off by switches in the end cab. All cabs have the switches fitted, irrespective of whether a de-icing car is in that formation.
The deployment is worked out so that first trains to branches are scheduled to carry de-icing cars, a frequent covering is then scheduled although this is not always possible with the limited de-icing car resources.
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mrfs42
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Big Hair Day
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Post by mrfs42 on Jan 14, 2013 14:54:01 GMT
De-icing is authorised when the ambient rail temperature, sensor at Amersham i believe, falls low. Is that still commissioned? I was under the impression that it had been taken out of service and there was now some form of co-operation with the Met Office. Mind, this comes from a hazy memory of a thread some years back on the forum and my memory may be at fault. |
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Fahad
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Post by Fahad on Jan 14, 2013 15:12:11 GMT
(I presume that's what the blue light signifies) Ah! I was afraid that that signalled a PEA activation! |
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Post by Deleted on Jan 14, 2013 17:39:24 GMT
(I presume that's what the blue light signifies) Ah! I was afraid that that signalled a PEA activation! PEA activation is a white light |
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Post by Deleted on Jan 15, 2013 13:02:27 GMT
Ah! I was afraid that that signalled a PEA activation!
PEA?
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Post by programmes1 on Jan 15, 2013 13:12:39 GMT
Ah! I was afraid that that signalled a PEA activation! PEA? Passenger emergency alarm. |
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Post by programmes1 on Jan 15, 2013 13:15:17 GMT
De-icing is authorised when the ambient rail temperature, sensor at Amersham i believe, falls low. Is that still commissioned? I was under the impression that it had been taken out of service and there was now some form of co-operation with the Met Office. Mind, this comes from a hazy memory of a thread some years back on the forum and my memory may be at fault. I think there is some kind of equipment in Amersham cabin perhaps someone will confirm or deny and I seem to remember that it is all done from the Met office sending out warnings and LU make the decision on No Risk Small Risk Risk Strong Risk |
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Deleted
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Post by Deleted on Jan 15, 2013 13:34:14 GMT
Ah! I was afraid that that signalled a PEA activation! PEA? Passenger emergency alarm. Thanks. Would a flashing blue light indicate that the train was being driven by the British Transport Police???  |
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Post by Deleted on Jan 15, 2013 15:30:05 GMT
Would be interesting to hear how the WSP equipment on the S stock deals with snow compared to EP/Whouse brakes on A stock.
Is the RAT running at all for snowy conditions?
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Fahad
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Post by Fahad on Jan 15, 2013 18:39:45 GMT
Passenger emergency alarm. Thanks. Would a flashing blue light indicate that the train was being driven by the British Transport Police??? |
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Deleted
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Post by Deleted on Mar 4, 2013 16:24:44 GMT
The rat does not run for snowy conditions, traction is not a major problem in snow, power pick up is the issue.
The northern line has automatic deicer operation, sensors at tunnel mouths switch equipment on trains on or off as required.
As far as I know decisions regarding deicing are made using met office forecasts. Cold is not the only issue, moisture in the air matters, if no frost is forming there is no need for deicing.
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Deleted
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Post by Deleted on Mar 6, 2013 23:15:58 GMT
De-icing is authorised when the ambient rail temperature, sensor at Amersham i believe, falls low. This is passed to Line Controllers and then station staff who then display "D-On" boards. A message is given via the train radio to drivers. De-icing boards are usually from the first station inside a tunnel, so that fluid is deposited from the tunnel mouth. i.e: District at Upney, Bow Road, Stepney Green, Aldgate East, Earl's Court, Parsons Green, Acton Town, Ealing Broadway. The equipment on trains is turned on/off by switches in the end cab. All cabs have the switches fitted, irrespective of whether a de-icing car is in that formation. The deployment is worked out so that first trains to branches are scheduled to carry de-icing cars, a frequent covering is then scheduled although this is not always possible with the limited de-icing car resources. Just to be picky, ;-) S stock has a soft button in the computer. I thought it was the sensor at Amersham that alerted the control center? |
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