@gunrunnerjohn posted:I think the OP wants to know how close they can be without a collision as he's putting up a ceiling track. Having that kind of spacing is not in the card I suspect.
Concur with that
OTS, if you are going to do something like below, then with these size curves I think John is correct in that 5" is good. If you use smaller curves, you will need to go to 6". As Mike mentioned, you may want to test your trains first on a floor test layout to make sure.