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London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#16
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Tripcocks on 165s
David 'Arsehole' Hansen wrote:
One way such systems can fail is if the arm breaks off. This risk is controlled by not having arms generally not striking trainstops and so not suffering the fatigue this involves. An arm at the front of the train will only strike a trainstop on rare occasions. The risk is so remote as to be of no concern. One of the benefits of trip cocks is that they are a very simple system. Adding a system to retract them would complicate the system, and probably increase the chances of a wrong-side failure. If there were any concern regarding this issue the simplest thing would be to tell drivers to kick them out of the way during preparation. |