I’ve got a couple of issues from 1990 that cover MR’s Burlington Northern 9x10-foot project layout. This track plan really fits what I’m looking for, but unfortunately neither of my issues give a minimum radius or minimum turnout. Does anyone by chance know what they might be? I really want about a 22" minimum for the main, but I have a feeling the BN layout is tighter than that…
According to the track-planning article in the March 1990 issue, the minimum radius is 12". Considering that this is N scale, that’s moderately broad. Your minimum of 22" would be moderately broad even for HO scale, and would require you to scale this plan up to about 18 x 20 feet.