Deleted
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Post by Deleted on Jan 27, 2007 12:38:41 GMT
When trains leave Northumberland Park depot, where do they go into ATO? Is it at the depot outlet signal?
Thanks,
David
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Post by subwayrail on Jan 27, 2007 15:55:05 GMT
In the depot: slow manual.
From the depot outlets to Seven Sisters platforms five and four: coded manual.
From NPD, trains mostly arrive at Seven Sisters platform five. Once fully berthed at the starter signal, the driver changes to auto. Some early morning trains go into platform four to form Walthamstow services. In this case the driver shuts down, changes ends, opens up in auto and waits for the correct route.
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Oracle
In memoriam
RIP 2012
Writing is such sweet sorrow: like heck it is!
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Post by Oracle on Jan 27, 2007 16:16:44 GMT
On the Auto Tube Rambler of 1980 the driver deliberately drove the 8-car train out of the depot in auto, and demonstrated what would happen if this was done accidentally. We were however warned over the PA about the sudden stopping that would occur.
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Deleted
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Post by Deleted on Jan 27, 2007 16:40:44 GMT
On the Auto Tube Rambler of 1980 the driver deliberately drove the 8-car train out of the depot in auto, and demonstrated what would happen if this was done accidentally. We were however warned over the PA about the sudden stopping that would occur. I can imagine the hell there would be to pay if such "antics" were engaged in in todays Health and Saftey concious environment ! Suffice to say, it's the absence of graduated braking that is the problem. If the train is set to ATO mode in an area which is not wired for ATO such as the Depot, the train will not find a saftey code and the Auto box will immediately apply the emergency brake. If ATO is selected where there are saftey codes (eg. from the snow cover (depot outlet) to Seven Sisters platform) but the section is not designated for ATO running, the train will hold the speed it was doing when ATO was selected. There are not however any brake spot commands to be recived by the train and in consequence it will not slow down for red signals, in the event of the train running past a red signal, it will then loose the saftey code, in fact it picks up a 120mhz code which it does not recognise and the Auto box then applies the emergency brake. It should be noted however I'm just indicating what would happen and that the system remails fail safe however ATO would not be selected by trains running from N Pk Depot to Seven Sisters. |
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towerman
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Post by towerman on Jan 27, 2007 21:39:58 GMT
The auto box only gives the code visuals,it's the safety box that energises or de-energises the code trip valve.
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Tom
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Post by Tom on Jan 29, 2007 20:45:52 GMT
in the event of the train running past a red signal, it will then loose the saftey code, in fact it picks up a 120mhz code which it does not recognise and the Auto box then applies the emergency brake. 120MHz?? It's 120 pulses per minute = 2Hz. |
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Deleted
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Post by Deleted on Jan 29, 2007 23:38:37 GMT
The auto box only gives the code visuals,it's the safety box that energises or de-energises the code trip valve. I'll get me coat ! ;D ;D |
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