Using Peco code 80 N gage switches and Peco code 80 flex track. Have a problem with derailment on a specific set of switches. Switching from main line to short line tracks using two right hand medium radius switches. Have no problem when locos go forward through switches. However, when sent through the switches in reverse, have derailment. Happens with two different locos. Other switches on layout in the same configuration work correctly either way. Have replaced switches with out of the box new switches and still have the same problem. Can not locate the source of the problem. Track before switches is mostly straight and level. Have been working on this problem for some time without results.
Suggestions/help please.
Well I’m stumped.
Are they steam or diesel and what are their wheel configuration? Is there any other locomotive that can transverse these switches without derailing?
Have you checked the wheel and track gauge? No bumps or misaligned rail?
If all of that is ok, something minor has to be different from the other switches with the same configuration.
At what spot on the switch do the wheels start to derail?
Sorry to ask a bunch of questions Don. just trying to help
If you’re running diesels, do they derail in reverse no matter from which direction they enter the switches? In other words, if you run them into the switches cab end first, they’re ok whether they enter from the left or the right?
Do you come right off a curve and into the turnout? I’ve noticed that a short straight section preceeding the point end of the turnout can make a world of difference. It allows the trucks to enter the turnout straight on, rather than pushing hard against the outside rail from the curve. If you can move the turnout down and away from the curve, even by 3 inches, you may cure the problem.
I found on the long turnouts that with the points thrown for the divergent track sometimes the straight rail on the through part gets bowed slightly which throws the gauge out enough to derail. When I realigned the turnout so the bow did not occur the derailments stopped.
Check the guage on all parts.
Tom
What about S-curves, they can create problems just as MisterBeasely states with curves.
I had the same problem and thought it was the track and it took my 8 year old nieghbor to point out that the coupler pin was too low and catching.
The out of guage issue has come up on one turnout I have so check it also.