Does anyone know of a double curved turnout that has an 18" radius on the outside and 15" radius on the inner leg? I know these are smaller than standard but it is for staging and not on the mainline.
Will 19-7/8 outside and 17-1/4 work for you?
I don’t know of any commercial turnouts commonly sold in the US with that sharp a radius - there’s not enough demand. The smallest Walters curved turnout is something like 24" and 18" - the inner radius is sharper than advertised. Perhaps some of the European or British “set track” turnouts might be close.
If you really want that small a curved turnout, you are going to have to bash a commerical turnout, curve a kit turnout, or build your own from scratch. The latter is probably the easiest, and certainly the best way to get the specific radii you want with operational reliability.
I do have to question the use of a 15" radius in staging - do you know for sure that your rolling stock will operate ulta-reliably on a 15" radius? Hidden staging demands more reliability than your up-front track, not less.
my thoughts, your choices
Fred W
Thanks Guys
Luckily the staging is accesiible and not hidden. I am going to screen it with a berm and trees. I think I will try to redo my track plan to incorporate the Peco turnout. Hopefully I can get it to work out OK. I have a very limited area for this staging so it is tight or maybe I give up the second track. Thank you for the help.
I believe Peco or Roco (one of them European companies that ends with “co”) made them a while back. I had one when I was in HO but it was their version that had 22" outside and 18" inside. But I’m certain they made an 18/15 version as well.
Perhaps a little different from what you were thinking.
On my lumber mill scene, I don’t have room for much of the mill. And I wanted to simulate log loads going in, and empty cars coming out. And I wanted to simulate empty lumber cars going in and loads coming out - could be box cars or flats in my era depending on whether it’s rough cut or finished lumber and destination.
I ended up with 2 spurs going behind the mill into a 4 track traverser. The traverser can slide horizontally (can also be done vertically) to align each of 2 tracks with each of the 2 spurs. It’s really no more difficult to build than a turntable, but you do have to have everything squared up. Essentially, it’s staging without turnouts because I didn’t have the length to fit any kind of turnout ladder. Using sliding drawer hardware, traversers have been successfully made as wide as 4ft.
There are lots more details about traversers at http://www.carendt.com/microplans/pages/shelf/traversers/index.html.
just a thought
Fred W
I think years ago, Flieschman had curved switches with 18"/15", back when they used to advertise regularly in the mags. Also, I have a few 22"/18" Brass/Platic switches with the Tyco brand from sometime around 1975. Mybe some could be found at MRR Swap shops or Flea markets.
I’m wondering if one could be fabricated using Central Valley curvable tie strips and their curvable turnouts kits? It definetly can be done using Fast Tracks system.
My small saw mill has a spur with log dump next to the pond. The unique thing about the saw mill complex is that the pond and mill are mounted on a pull-out drawer, which provides access to the hard to reach rear area. 
I’m not sure what the inner radius is, but we removed an old Roco left-hand turnout from our club layout a few years ago that had an outer radius of 18 inches and a smaller inner radius – maybe 15 or 16. I don’t think you can find Roco HO scale track in the U.S. anymore.