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Post by jamesb on Aug 7, 2007 13:08:16 GMT
I was on a Metropolitan Line train recently, and there was a horrible thudding/banging sound coming intermittently from underneath the train only when it was moving.
Can it damage the underneath of the train? I remember the thudding used to be more common and then disappeared, but recently I've heard it coming back again.
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Deleted
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Post by Deleted on Aug 7, 2007 13:09:11 GMT
Wheel flat, due to heavy braking, wheels have locked up and have 'skidded'.
if not rectified, it will lead to very quick wearing out of the rails and the wheel.
Might even have been the compressor recharging the train line.
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Deleted
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Post by Deleted on Aug 7, 2007 13:14:59 GMT
Not necissarily... A Stocks make weird and wonderful noises at the best of times. It may be a horizontal damper that is defective.
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Post by jamesb on Aug 7, 2007 13:16:57 GMT
I don't think it was a wheel flat.
It wasn't continuous, it seemed intermittent and random, and if felt like something was physically hitting the underside of the train, as if something rubber had warn out and two metal parts were hitting each other.
I heard it on a few trains before, but more in the past.
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Ben
fotopic... whats that?
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Post by Ben on Aug 7, 2007 13:20:43 GMT
I'm guessing you were on a trailer? If sitting over the bogies one can hear terrible 'stretching' noises followed by disconcerting bangs. Not a clue what causes them though.
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Deleted
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Post by Deleted on Aug 7, 2007 13:22:47 GMT
Ahh, when they lurch over pointwork! 59ts used to creak and bang too!
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Deleted
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Post by Deleted on Aug 7, 2007 13:25:20 GMT
I've heard the banging as well - I always thought it was the intra-car buffers crashing against one another due to poor horizontal damping.
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Post by Dmitri on Aug 7, 2007 14:36:33 GMT
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Post by jamesb on Aug 7, 2007 17:02:24 GMT
Thanks, I read it...
When it bangs constantly on a journey, it gives you a headache! The creeking is ok, but when it bangs it does make a thud. (Of course, I could always change trains but I don't haha)
Is it something which is recognised that has to be fixed, or is it just taken as part of the character of the A stock...
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Post by edb on Aug 7, 2007 18:53:33 GMT
It's done it all the time I've ever been on them (okay it's only since 2001 but hey thats 6 years!!)
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towerman
My status is now now widower
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Post by towerman on Aug 7, 2007 18:55:34 GMT
Used to get it on 62TS as well,the pads at the ends of the axle wear and then you get what is called "endplay"
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