I am reworking a design I made trying to use wider curves. I am very new to this and have no idea how to design a layout by hand, so I used SCARM to create this layout plan (the blue is the dimensions of the house) using stock Atlas track. However, I found that 49.5 in radius curves are about as small as I can do, and I'm looking for 54" to be the new smallest radius I use for the branch line track.
The layout below is what I am going to try and build. There is a double track mainline loop that I need to redesign with much wider curves (60" and 64"?) and the yard will need to have wider curves as well.
My trouble is in figuring out what the next largest curve radius is. the 54" radius curve is 21.21 inches long in sectional track. How wide should the next radius be? 58" if I keep 4 inch rail centers? How long would the sectional track be? It might be "newbie thinking" but I'm trying to keep the geometry to a minimum with the flex track and maintain simplicity.