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i am looking to include a return loop underneath the main line on the new layout. This will be hidden staging and a hidden loop to allow for continuous running when not in an operating scheme. The beginning of the line will be at say 45" and will climb a grade so that a return line beneath it at 45" will allow the trains to return to the start. There will be a corresponding downgrade later in the line. What I am trying to figure out is how high should the upper line be to allow for the running of double stacks. I don't have any but want to plan the layout so that I can run some taller stuff down the line if I choose to. Can anyone tell me how high these cars are? Are autoracks taller?
Thanks
Your best bet is probably to get an NMRA track gauge. If the gauge fits, pretty much any engines or rolling stock in existence will fit as well.
I use 3 1/2" as a minimum for clearance to allow stack trains and some fingers should the need arise.
In some places, due to framework constraints, there are a few 3 1/4" spots that are a little tight.
Thanks guys. I was actually thinking I would need a lot more than that. Glad to hear it should not need so much. I don't want a real steep grade so being able to spread it out and have plataeus along the climb would be helpful for scenery and stuff.
I use 3 1/2" as a minimum for clearance to allow stack trains and some fingers should the need arise.
In some places, due to framework constraints, there are a few 3 1/4" spots that are a little tight.
Glad that's working out for you, but that's pretty tight and I wouldn't recommend it for the original poster's new design. If there are any turnouts in the hidden area that ever need maintenance or replacement (and they will), 5-6 inches would be a lot more workable.
Yeah it is tight, but as I said that's a minimum.
I should have mentioned that I have more clearance in the actual staging area, but to keep the grade in the loop down at or under 2.5% that was the way to go.
You're right about the turnouts!
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