@sinclair posted:I'm guessing that the locomotive is somehow engaging the anti-derail function of the command switches, meant to throw the points to align with the train when coming to the back of the switch. I do not know if there is a way to "remove" this feature on FasTrack. I would try swapping the command switches for manual switches as they don't do this, and see if it stops.
Agreed. An even easier method: Simply tape over the straight anti-derail rail with some painter's tape or similar, for a short distance (an inch or two) past the frog. See if this will allow your train to run through the curved route without triggering the switch to throw straight.
If this cures the switch problem, then I would guess that the pilot truck wheel gauges (or the width of the pilot wheels themselves) are too large and causing the problem by briefly contacting the straight rail while going through the curved portion. Come to think of it, the pilot truck wheels in your pictures do not look to be fast angle profile, which may also exacerbate the problem.
Give this a try and see if it helps. If not, we'll have to work on another solution.
