Thanks Martin - I was widening the flangeway on the Templot "gauge" drop downs - ...let me try what you suggest above.....but everything is working fine....lots of trial and error ballancing the fit of the rails, the shrinkage of the resin etc.....but gradually I am speeding up as I work through these things....I will pass the settings to my fellow S Scale friends so that they do not have to work this all through again.@Michael Woods
If the first wheel is running with the flange hard against the rail, the back of the opposite wheel should just kiss the check rail. In other words, the all-important check gauge is equal to the back-to-back dimension plus the effective flange thickness. This dimension should never change, regardless of any gauge-widening in the running rail on that side. It follows that the check rail gap increases by the same amount as the gauge-widening. But not the V-crossing gap.
If the first wheel is running through a V-crossing at the time, the prototype clearance between the back of the wheel and the wing rail should be 5/8". This scales to 0.25mm in S scale if you are using exact-scale wheel profile and V-crossing flangeway. The prototype V-crossing flangeway is 1.3/4" which scales to 0.696mm in S scale. I believe the S Scale Society rounds this up to 28 thou = 0.71mm in Templot. This V-crossing flangeway dimension should never change, regardless of any gauge-widening.
If you have added gauge-widening by increasing the track gauge for your plug track, you need to increase the check rail flangeway on the chairs by the same amount, which you can do by clicking this button:
View attachment 7461
Enter the amount by which the gap should be increased. Please note this will make the check rail chairs longer, which in turn means printing a fresh timbering base with longer sockets.
You can increase the track gauge for gauge-widening on the gauge menu at:
View attachment 7462
N.B. Do not modify the flangeway gap there, as that would change the V-crossing flangeway and disrupt the geometry of the turnout. For check rail flangeway adjustments, use only the button above on the export dialog.
Please note that Templot does not check that you have used the same increase for both, it's up to you to make sure of that.
I hope this helps you cure the problem?
p.s. I think you are the first one to be testing all this stuff. As far as I know it is working ok, but please report if anything seems wrong! Have you been able to measure the actual flangeway gaps which your chairs are producing? Car spark plug feeler gauges are useful for measuring flangeway gaps.
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