Dump wagon derailing

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HobbitFertang

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Hi Folks, can anyone explain why my new RhB dump wagon (LGB 46696) derails at every slight irregularity in the track whereas my trusty RhB passenger coach (LGB 30512) never does? . . . I've tried adding various amounts of sand load with little or no effect.DSC_0163.JPG
 
That's odd for an LGB product. Are the trucks (bogies) equalized ? How much play is there where the trucks are attached to the chassis ? Could one set of wheels be out of gauge ? Are the wheels plastic ?
 
Do the axles run freely?
Do they turn, or are they fixed?
Have you checked they are in gauge?
Are the wheels square on the axles?
Is there some 'slop' so they can accommodate evenen track?

PhilP.
 
I haven't tinkered with the play in the bogies where they attach to the chassis. It came with a fair amount, I'd say. The wheels are metal and rolling freely. The bogie flexibility is all there too as you would expect. Could it be something to do with the differences in wheelbase?
 
Do you have any weight in the hopper? If so I would remove it. Plus I would add self adhesive strips of weight to the bottom of the chassis.
 
One of my larger wheel base wagon derails, I have found this to be because the track, a curve on a gradient, is the issue, but due to the geometry cannot be rectified with out changing the layout. My wagon derails because of the lack of side play in the bogie, meaning on wheel (on the outside track) rises above track height, and derails.
 
Hasn't somebody else had an issue with one of these, some time back?

We made quite a few suggestions, but I don't know what the real solution was.

I would look at:
  • Axle lubrication
  • Axle sideways movement (very necessary)
  • Bogie pivot - if necessary slacken the pivot screw
  • Possible fouling of flanges on bodywork
I think there were many suggestions about track laying accuracy, but for my money, with LGB flange depths, are you kidding? I have the worst laid track on the planet, and I run some of the finer flanged wheel types, and I rarely have a derailment :shake::shake:
 
My track must be worse then! The gauge and slop seem quite ok. The bogies do come very close to the bodywork on R1. One of the steps was snapped off the last time it derailed. Would it help to bring some springs into the mix?? Maybe the wheelbase is just suiting the irregularities by chance, whereas with the passenger coach it isn't (??)
 
When SW isn't looking....
Borrow her handbag mirror. Put it across the track, right angles to the rail tilted so you can sight along the track when looking from directly above..

Then get a short spirit level, and check level across the track at the offending point.

PhilP.
 
Rhinochugger said:
Hasn't somebody else had an issue with one of these, some time back?

We made quite a few suggestions, but I don't know what the real solution was.

I would look at:
  • Axle lubrication
  • Axle sideways movement (very necessary)
  • Bogie pivot - if necessary slacken the pivot screw
  • Possible fouling of flanges on bodywork
I think there were many suggestions about track laying accuracy, but for my money, with LGB flange depths, are you kidding? I have the worst laid track on the planet, and I run some of the finer flanged wheel types, and I rarely have a derailment :shake::shake:
Click to expand...
Yes I was going to say exactly that.
 
HobbitFertang said:
My track must be worse then! The gauge and slop seem quite ok. The bogies do come very close to the bodywork on R1. One of the steps was snapped off the last time it derailed. Would it help to bring some springs into the mix?? Maybe the wheelbase is just suiting the irregularities by chance, whereas with the passenger coach it isn't (??)
Click to expand...
Stewie has just shown a vid of his Grey one running with lots of R1 and he does not report any issues with his.
dunnyrail

Post in thread 'Arosaish Bahn'

Very good Stewie, you do not appear to be having the same issues with your bogie hopper that a couple of others on here have reported. Their ones were brown though I doubt the colour would be the issue and you use a lot R1’s so that cant be their issue either. I suspect it is more likely that your track is laid on a well prepared surface.

I must dig some pics out of the Ruschbahn Catenery for you, I did do quite a few pics of the build for a potential article that never occurred. We used 40thou very hard Brass wire that Andy sourced from who knows where? It survived very well using very...
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I typically run 4 of these (all different colours) and don't have any problems what so ever can only suggest check position of wagon in the load does it make a difference if it's directly behind the train with the other wagons behind or at the back of the load with nothing behind it?

On my line if anything is going to derail it's the sliding wall wagons.
 
If you are able, change out all 4 wheelsets for "known good" ones (metal or plastic... doesn't matter) from other rolling stock that runs through that track satisfactorily. If that fixes the problem you need to to take a very close look at the wheelsets from the 46696. :wasntme:
 
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HobbitFertang said:
Could it be something to do with the differences in wheelbase?
Click to expand...
Shouldn't be.

If you're using all bogie to bogie connections, then the difference in wagon length won't have a lot of effect. (Similarly when using all body to body connections - the problems arise when hooking up a body-mounted coupler to a bogie-mounted one).

Try uncoupling the wagon and just placing it on the track at the point of derailment against the coupling of the next vehicle and look at how they align - that will indicate if there's a likely problem.

As an aside, I use virtually all body-mounted couplers, and the Accucraft 1:20.3 Jackson-Sharp coach is quite long. I notice sometimes that the coupling pressure sometimes causes one of the coach bogies or one of the adjacent wagon bogies to tip up sideways on a particularly sharp curve (for me that's slightly less than 8ft diameter, but even with finer flanges than LGB, nothing has derailed ................... yet.

So, I go back to wondering whether something is fouling the body. It really takes something for wheels with the size of LGB flanges to derail, but it seems there is something occurring with this particular wagon design.

Watch it closely as it gets to the point of derailment because it will be worth cracking the problem.
 
HobbitFertang said:
It even derails when I push it along on its own by hand!! Also, the drawbar is the same length as on the RhB passenger coach . . .
Click to expand...
Excellent, now watch closely to see what actually happens at rail level when you do that - you might just help plenty of others if you can crack it.
 
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