What are your thoughts on the other stuff hung from this channel arrangement?
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Northern withdraws some CAF trains due to yaw bracket failures
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What are your thoughts on the other stuff hung from this channel arrangement?
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Ayrshire Roy
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If you look at the CAF built Viewliners that are in service with Amtrak the yaw dampers are big and chunky compered to the 195/331s.
Could it possibly be the spec they have been asked to build as they already have a much stronger looking design.
Phillipimo
Member
Northern’s CAF multiple-units return to service
UK: All but two of Northern's CAF Class 195 diesel and Class 331 electric multiple-units are now back in service, after analysis of the causes of the cracks discovered in April and the development of a modification that is being rolled out across the Class 195 fleet.
www.railwaygazette.com
You need to register (for free) to access this. But the TLDR is that only powered bogies of diesel units were affected, all but two are back in service now, the modification is being rolled out.
py_megapixel
Established Member
But these things go out on competitive tender requiring each prospective supplier to bid for the contract. CAF should not have submitted a bid which involved using poorly designed parts - the only reason for them to do so would be to make their bid appear cheaper than everyone elses, and it looks like it worked!
The tender invite will provide an outline of requirements (likely to include bits not falling off) it will be down to the manufacturer to design something that meets the spec.
You could design something then get the constructor to build it exactly to your spec. But then any design issue is on you. This is how I build my extension. I did the drawings, plans specced out the materials and things like the location of the lights and sockets. But even then I let the builder who built to this design have some freedom as to exactly where he put the cable runs etc.
I'm not sure if any train builders would build a train completely to a builders design and spec. And if they did it would be at a crazy price. Most trains are built on an existing platform reusing standard or existing parts methods jigs and dies.
I wonder if any other of CAF stock (foreign) is built using this T rail construction and with yaw dampers hung in teh same way.
I also wonder if the other equipment fixed to these rails is affected or if it is just the way in which the force is applied to this bracket which appears to add leverage is the issue.
Dspatula
Member
This doesn't seem to add up as 331s have the same modification as the 195s and with only 16 out 31 331/0s out today it's odd to say all but two are fixed, although there are plenty of other things to go wrong with them so who knows.Northern’s CAF multiple-units return to service
UK: All but two of Northern's CAF Class 195 diesel and Class 331 electric multiple-units are now back in service, after analysis of the causes of the cracks discovered in April and the development of a modification that is being rolled out across the Class 195 fleet.
You need to register (for free) to access this. But the TLDR is that only powered bogies of diesel units were affected, all but two are back in service now, the modification is being rolled out.
Not so, this is how railway products were long done. For example, the Networkers were built half of them by BR Engineering and half by Metro-Cammell. BR did the design, Met-Cam just built to that.
In any event, when a design is done the client, in the case of the 195s Eversholt, is the one paying for it and should have competent engineers go through every aspect of the design, plus have one or more resident engineers at the factory overseeing that every step of the assembly is in accordance with the design and the approved stanbdards. This is how large projects are (or should be) always done.
There’s now another issue with 331’s after an incident at Farrington Junction.
LOL The Irony
On Moderation
They're a different family of train and I sort of suspect that a version of the CxK would've been a better bet. Unfortunately, the CxK was replaced by the Civity.
Incident?
After seeing this photo I'm not surprised the the yaw damper bracket failed. The tee nuts (I can't think of a better name) don't extend beyond the length of the bracket base, so all of the stress will be highlighted in a small area.
The only part of the channel that has failed beyond the bracket is the outside part (the part nearest the the person holding the bracket).
The only part of the channel that has failed beyond the bracket is the outside part (the part nearest the the person holding the bracket).
Attachments
61653 HTAFC
Veteran Member
Aren't all repairs temporary, when you think about it?
Dspatula
Member
The issues with the voltage in the wires again?
I have come across a bit better photo of the packing piece that shows the mounting holes better.
Looking at this photo again it looks like the yaw bracket maybe recessed into the packing piece, if that is the case it will help to stop the bracket trying to twist and to stop any lateral forces as well, along with helping to locate it.
Looking at this photo again it looks like the yaw bracket maybe recessed into the packing piece, if that is the case it will help to stop the bracket trying to twist and to stop any lateral forces as well, along with helping to locate it.
Not really anything to do with the units, more an 'external influence'.
175001
Established Member
331s were damaged at Farrington Jct due to vandals leaving a paving stone foul of the down slow which ripped off the APC magnets. 10 units were affected.
swt_passenger
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Small point, but the magnets are on the track, the train carries an APC receiver…
syorksdeano
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How come 10 units were affected? Surely any damaged would have been noticed by the first train to be damaged?
You (not you personally, obviously) can attempt to blame CAF for many things but the actions of a destructive mindless moron aren't one of them....
Automatic Power Control, yes?
(for automating the opening of the main circuit breaker at neutral sections)
175001
Established Member
Sorry yes as one who signs these i should knoa better, joys of a 0200 finish last night...
Apparently the paving stone was just fouling enough to affect the receivers, which means it probably wasn't initially apparent from the cabs.
edwin_m
Veteran Member
The APC magnets and receivers on both sides, so the APC would most likely carry on working on damaged units unless they happened to pass a neutral section where the magnet was missing. So it wouldn't be found until someone noticed, probably during an overnight check, by which time several units have passed received damage.
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