shakey1961
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Class 390 doesn't sound healthy!
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Schnuzelbug
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Sounds like wheelflats in that carriage.
shakey1961
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Sounds dangerous to me
221129
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It's not.
DarloRich
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it isn't - sounds like a wheel flat. Common, especially during autumn. A nice trip over the wheel lathe will sort that out
Sparks807Evo
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Certainly not dangerous - wouldn't be out in service if it was. Just very noisy at times! The 172s during the Autumn suffer the same issue usually.
Philip Phlopp
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There are special sensors at various points on the network which measure the impact created by a wheel and wheelflat. These are, unsurprisingly, known as Wheel Impact Load Detectors (WILD for short).
If a train is a danger to itself or the track, WILD will have the train either restricted in speed or barred from travelling further (and then it's wheelskates or a low loader for the offending vehicle).
WILD tends to be known as WheelChex, but that's just a supplier name.
And as everybody else has said, perfectly safe. It'll wear the track a little bit more, which is why permanent way want wheelflats picked up on and dealt with very quickly.
If a train is a danger to itself or the track, WILD will have the train either restricted in speed or barred from travelling further (and then it's wheelskates or a low loader for the offending vehicle).
WILD tends to be known as WheelChex, but that's just a supplier name.
And as everybody else has said, perfectly safe. It'll wear the track a little bit more, which is why permanent way want wheelflats picked up on and dealt with very quickly.
ScouserGirl
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Wheel Flats!!
This sounds really bad!!
This sounds really bad!!
221129
Established Member
It is just flat spots on the wheel. Nothing to really worry too much about.
Minilad
Established Member
I think there's only one thing that will solve the wheel flats on a Pendolino. Scrap Yard 
pdeaves
Established Member
List of current WILD locations is at http://www.railwaycodes.org.uk/misc/habdwild.shtm, if anyone's that interested!
Philip Phlopp
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I think there's only one thing that will solve the wheel flats on a Pendolino. Scrap Yard
They're not maintained at Clown Point, proper depots have wheel lathes.
Is there anything that doesnt sound dangerous to you?
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There aren't as many as I thought there would be.
DaveNewcastle
Established Member
I spent 3 hours on my journey home last night near the end of a car with a flat on an HST set last night. One of the other 3 passengers in the coach (really! 4 of us non-stop to York, then just 3) who was at the very end, sitting over the affected bogie, made a complaint about it to the CSAs and then to the Guard. It was serious. Very serious. It had made his drink judder across the table! ! !
The Guard's response was perfect. He sat down with the chap and listened with a serious and concerned look. And said gravely but reassuringly : "You're not the first person to mention it. I'll make sure this gets passed on."
Train ran fine. Arrived early in fact.
I think it's impressive that the worst fault that people can find with 40 year old trains making 125 mph journeys on our frequently criticised ancient infrastructure is that a glass of drink nearly spilt on a passenger's suit due to a wheel flat. Or that it makes a mobile phone video look and sound a little wobbly.
The Guard's response was perfect. He sat down with the chap and listened with a serious and concerned look. And said gravely but reassuringly : "You're not the first person to mention it. I'll make sure this gets passed on."
Train ran fine. Arrived early in fact.
I think it's impressive that the worst fault that people can find with 40 year old trains making 125 mph journeys on our frequently criticised ancient infrastructure is that a glass of drink nearly spilt on a passenger's suit due to a wheel flat. Or that it makes a mobile phone video look and sound a little wobbly.
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In fairness, I'd probably not be impressed either. I'm sure had the wheel flat not been there the suit may not have said anything at all? If the train is in such a state that drinks are physically moving across the table when ideally they shouldn't, then kudos to him for telling the guard. Did the passenger know it was something as simple as a wheel flat?
--- old post above --- --- new post below ---
Was the passenger to know that if he moved carriages the same problem wouldn't persist?
I am happy to accept that it's not dangerous in any way (below the threshold of track damage etc) but it's not nice at low speed... but when up to speed it's not that much worse (correction: no worse) than being in a Voyager or any other DMU though!
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SpacePhoenix
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I think I might have traveled on a 442 years ago (way back when they were run by SWT) that made a similar noise. Any particular type of train more likely to get this or all just as likely to get it?
DarloRich
Veteran Member
Any type can (and will) suffer with flats. You should listen to some of the freight wagons running about with square wheels. Awful sound and hurting the track
sprinterguy
Veteran Member
The old two axle HAA merry go round hoppers were terrible for it: "BANG - BANG - BANG - BANG"; you could hear an affected wagon approaching from half a train length away, sounded like they were shaking themselves to bits!Any type can (and will) suffer with flats. You should listen to some of the freight wagons running about with square wheels. Awful sound and hurting the track
--- old post above --- --- new post below ---
Lightweight, fast accelerating and braking units used on regular stop commuter services can be particularly susceptible to low adhesion conditions leading to wheel flats - the 323s are notoriously bad for it.
ScouserGirl
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I know yeah!!
I've been on a HST from Plymouth to London with Wheel Flats (: there's not much they can do until evening when they can have a look at the set!
The Planner
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Wheelchex is old hat now, GOTCHA is the new fangled one being installed.
ScouserGirl
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I read further up that it was something to do with his drink going flying!!
221129
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His drink moved. No way would it go flying though. I find things don't move around anymore than usual when breaking, cornering etc.
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