Derailing

[wales01man]

Help please
Im testing my track by running a farish hst power car on its own runs ok with dummy ok put a carriage in middle it comes of track the curves are 4th radius and without carriage the train races round track at full speed??????????
Thanks for looking

[cmeonthemove]

First thing I would suggest is running the HST power car and carriage without the dummy and see if you get any derailments then. If not, put the dummy back on and run the HST slowly and see if it derails. Is it always the same place it derails, such as the beginning of the curve or halfway round? Watch for the buffers colliding (longer coupling needed) or if it's one particular point of the track, check there is no obstruction causing the derailment. If the carriage derails without the dummy then check the bogies on the carriage rotate freely.

[wales01man]

Run the train as suggested still derails but not in the same place seems the carriage jumps at times?

[b308]

Check the track first for any kinks or bumps... If that doesn't show anything then get a piece of straight track and test the dummy and the coach by pushing them along to check they are both free-running... If its not the track then I'd suspect that one of the wheels is binding causing extra drag on the curves...

[wales01man]

checked the track and the wheels doesent derail in same place or at same speed my thought should i add weight to coach some of my 00 coaches are weighted but none of the farish ones??????????

[wales01man]

tried all suggested still jumps but at different places any ideas feel like ripping it all up

[rabbitaway]

I once had a Farish coach with some moulding flash on the bogie catching the under frame

Only a small amount but enough to catch and de-rail the coach

So it may be worthwhile having a look

[m8internet]

What is the track sitting on?

[wales01man]

Thanks guys
Will look at carriage with a magnifying glass track is on cork and some on rubber underlay base is 9mm ply or mdf well supported no kinks or bumps

[Pete Mc]

Hi,I've got two Dapol hst's with almost exclusively Dapol mk3's.However,as we all know,Dapol don't currently make a TGS or TRFB.Incidentally,my hst's are blue/grey ones.Anyway,in order to have a TGS and a TRFB,I've had to use Farish mk3's with vinyl overlays which look good,but the Farish coaches are significantly lighter in weight than the Dapol ones.So what I did was weighed the Dapol coaches,then weighed the Farish ones.I compared the two weights and added some small offcuts of lead to bring up the Farish coaches weight.
Now my Farish mk3's don't derail at all.
Job done.
Pete

[m8internet]

Do your Farish coaches have interiors?
Most of mine have BR Lines interiors fitted, and this significantly increases the weight
I would be interested to know the difference in weight

However, even with no interior the coach should not derail
If fitting vinyls make sure there is no overlap of the body, which then contacts the bogie

[wales01man]

Thanks again gonna try adding some weight if i can get body of chassis ive got som window lead strip 8mm wide i shal try to make weight the same as power car this never comes of on its own strange thing is the train will run several circuits ok before it derails no change of speed or direction?

[ste234]

Are the axles properly located into the holes on the bogie sides? My Mk4's axles sometimes come out of there place causing derailments!

[wales01man]

Thanks for all the suggestions tried all and the problem gets worse got 4 running tracks trains are jumping all over the place ive made a new plan and wiil rip it all up and start over again

[rabbitaway]

Are your curves on inclines?

If so I have had bogies catching if the incline is inconsistent and this causes de-railing
Usually buffer lock and only with certain coaches but the normal HST Mk 4 does not have buffers, is this the case

I have had a few problems with my Blue Ribbon Pullman coaches de-railing and it seems to sort out by changing the coaches around in the rake, but these are close-coupled, so try added further coaches even if they are not Mk 4s