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Post by jamesb on Feb 1, 2022 19:10:18 GMT
(Please forgive me - I posted this earlier and in my attempt to embed the video accidently deleted my post, so am re-posting)
Yesterday, each time the train slowed down there was an intermittent strange noise as shown in the video below. It seemed to increase in intensity as the train slowed to a complete stop, and did not restart until the train start to brake again. At all other times the train sounded completely normal and there were no unusual smells etc.
What could the noise have been?
(EDIT: The strange sound was reported officially to TfL)
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hobbayne
RIP John Lennon and George Harrison
Posts: 516
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Post by hobbayne on Feb 1, 2022 21:42:58 GMT
Did you tell the driver? Unusual noises under trains are treated very seriously.
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Post by jamesb on Feb 1, 2022 21:55:23 GMT
Did you tell the driver? Unusual noises under trains are treated very seriously. No I didn't because the train left the station before I got to the front. Also, the train appeared to be running normally, I couldn't perceive any vibrations from where I was sitting, and there were no unusual smells. I also couldn't be certain that the sound was coming from under the train because it seemed to be at the other end of the carriage. In that situation, as a passenger, I didn't really know what to do, to be honest. I did report the train and carriage number after the event though. |
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Post by goldenarrow on Feb 2, 2022 15:26:50 GMT
From the passenger perspective you've done as much as you can reasonably be expected to given there were no clear and immediate signs of danger. Just going by the audio, thats sounds to me like the speakers could be 'spitting' which can be caused by something as simple as loose wiring.
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Post by t697 on Feb 2, 2022 19:11:47 GMT
I was wondering about a malfunctioning Saloon Vent system flap. The one that swaps between fresh air and recirc, assuming the 92TS system has them of course which I vaguely recall it may do.
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Post by jamesb on Feb 2, 2022 20:20:23 GMT
I was wondering about a malfunctioning Saloon Vent system flap. The one that swaps between fresh air and recirc, assuming the 92TS system has them of course which I vaguely recall it may do. I also wondered that, I think that a fan draws air from outside to blow out of the vents behind the seats. It just didn't seem like a noisy fan, unless it was a fan trying to start continuously. |
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