Yes I do have Peco flex track and some RH & LH Peco large radius turnouts. I thought about just pinning the yard sections down with tee pins to a 4x8 1/2" piece of foam board that I having laying around, just to get the feel for it.
What I'm trying to figure out now is what minimum size radius divergent track to use on the large radius turnouts for the run-a-around track inside the yard, and still keep a 2" (center to center) distance between tracks. It will be a small switcher engine, like a SD40-2 or a EMD GP60, that will work the yard,.
So I'm thinking a minimum radius like 9 1/2" should be fine for a Locomotive to traverse through the yard at 5 to 10 mph.
How does that sound?
SideTrack Hobo
SideTrack Hobo;
There is nothing "small" about an SD40-2 . That's a pretty long, six-axle diesel road locomotive.
I don't recommend 9-1/2" radius curves at all. They are the very tight equivalent to an 18" radius curve in HO.
I originally adopted 12" as the minimum radius curve on my N-scale layout. My thinking was that any N-scale equipment could make it through an 11" radius curve, so 12" was a slam dunk. Wrong. When I bought a pair of Kato's 2-8-2 Mikado steam locomotives, they did not like my 12" radius curves very much. Yes, they could make it through those curves, sometimes. But they derailed many time too. I did some real world testing and found that 16" was the smallest radius where the Mikados stayed on the track reliably, time after time. This despite Kato's recommended minimum radius of 11" for these locomotives.
In the model world, going way too fast is likely to have your locomotive fall on its side. However, going very slow is not a substitute for good track planning and tracklaying. A prototype locomotive can often negotiate some track that's in pretty lousy condition, but the fact that it weighs hundreds of tons is a big help.
With today's N-scale locomotives, using 128 speed step DCC, five scale miles per hour is probably possible.
I remember early N-scale locos that couldn't begin to even get close to that low a speed without stopping.
Still, I recommend being conservative, and designing all the reliability into your track that you possibly can. That translates into no sharp curves. No small frog # turnouts. No "snake trail" routes through a yard ladder. And very careful tracklaying.
Traction Fan 🙂