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paul7575
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« Reply #150 on: December 20, 2017, 14:29:29 » |
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With points 1524A and 1524B (and 1524C) all clipped normal, how would they achieve a route into P13/14?
Am I missing something obvious here?
Paul
Paul, if you look at Figure 2 in the report you will see that it is 1525AB points that direct trains into/out of Platforms 12/13/14/15. 1524ABC points are only required normal for those movements. Ok ta. Goes back to that '4 state' truth table we discussed earlier doesn't it. Paul |
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SandTEngineer
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« Reply #151 on: December 20, 2017, 14:44:50 » |
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With points 1524A and 1524B (and 1524C) all clipped normal, how would they achieve a route into P13/14?
Am I missing something obvious here?
Paul
Paul, if you look at Figure 2 in the report you will see that it is 1525AB points that direct trains into/out of Platforms 12/13/14/15. 1524ABC points are only required normal for those movements. Ok ta. Goes back to that '4 state' truth table we discussed earlier doesn't it. Paul Correct. |
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SandTEngineer
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« Reply #152 on: December 20, 2017, 15:15:22 » |
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One of the basic principles of signalling testing is that all Test Straps are individually numbered. When you fit them you ‘count them all out and then count them all back in again’ to make sure one doesn’t get accidentally left in place. If a ‘strap’ is required to be left into place after commissioning then it should be made permanent and designed/checked/approved within well documented procedures and standards.
Lets wait and see what the continuing RAIB▸ investigation throws up.......
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Oxonhutch
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« Reply #153 on: December 20, 2017, 19:56:48 » |
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Yup. The number of wires landed on each terminal is in the plan.
Part of our [on my heritage railway] S+T sign-off, is confirming that each terminal has the correct wire count. Sounded anal to me the first time I had to do it, but this accident reinforces why it is so necessary.
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Electric train
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« Reply #154 on: December 21, 2017, 18:26:08 » |
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One of the basic principles of signalling testing is that all Test Straps are individually numbered. When you fit them you ‘count them all out and then count them all back in again’ to make sure one doesn’t get accidentally left in place. If a ‘strap’ is required to be left into place after commissioning then it should be made permanent and designed/checked/approved within well documented procedures and standards.
Lets wait and see what the continuing RAIB▸ investigation throws up.......
Like SandTEngineer I am surprised that a test strap and points were left unclipped; whilst there is much ribbing of S & T by E & P one thing I do know from experience of working with S & T testing teams is their attention to detail, being methodical and not being concerned if they tell the powers that be "we ain't finish testing yet" |
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Starship just experienced what we call a rapid unscheduled disassembly, or a RUD, during ascent,”
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eightf48544
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« Reply #155 on: January 29, 2018, 16:13:33 » |
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Lets wait and see what the continuing RAIB▸ investigation throws up.......
Appears RAIB have produced their Interim Report. https://assets.publishing.service.gov.uk/media/5a3bc2b8ed915d61889d9b4e/IR022017_171220_Waterloo.pdfRoger Ford has a summary in Febs Modern Railway. Appears a Test Strap was left in place and the relevant points not clipped. He says similar to Cardiff incident in 2106 when a decommissioned set of points was not clipped. Very worrying. |
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« Last Edit: January 29, 2018, 16:19:09 by eightf48544 »
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Adelante_CCT
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« Reply #156 on: January 29, 2018, 18:40:41 » |
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I agree, very worrying that they know an incident will occur in Cardiff in 88 years time.
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johnneyw
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« Reply #157 on: January 29, 2018, 19:32:19 » |
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I agree, very worrying that they know an incident will occur in Cardiff in 88 years time.
I see low ticket sales for the service on that day. On the upside, a good one to short form! |
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Fourbee
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« Reply #159 on: October 08, 2018, 19:58:38 » |
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There's a lift outside the Waterloo station 'arch' exit (exit 5, if you will). Where does it go?
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stuving
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« Reply #160 on: October 08, 2018, 20:12:25 » |
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There's a lift outside the Waterloo station 'arch' exit (exit 5, if you will). Where does it go?
The sign on it says "Lift to Subway". Do you mean where does the subway go? |
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paul7575
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« Reply #161 on: October 08, 2018, 20:58:31 » |
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Isn’t this one of the routes to the IMAX cinema on the roundabout?
Paul
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stuving
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« Reply #162 on: October 08, 2018, 23:32:47 » |
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Isn’t this one of the routes to the IMAX cinema on the roundabout?
Paul
I think so, on the grounds there is such a subway and it seems likely this is its end. I found that in a Lambeth proposal from 2011 to close this part of the subway, making Waterloo Place more friendly to pedestrians. |
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Phantom
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« Reply #163 on: October 09, 2018, 10:12:26 » |
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There's a lift outside the Waterloo station 'arch' exit (exit 5, if you will). Where does it go?
Narnia? |
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Fourbee
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« Reply #164 on: October 09, 2018, 10:52:09 » |
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I did wonder if it was a shortcut to anywhere; I remember going to the IMAX a long time ago.
I like using exit 4 to Tennison Way and doubling back into The Hole in The Wall ;-).
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