Increasing the clearance of the first loop by about 2-3mm by reducing a 3-ply spiral to 2-ply. Note that this is actually still tighter than my...
Testing helix track while laying with a six axle engine as well as the two longest and the two tallest cars I could find. Here we see a double...
Using Atlas code 80 turnouts (00,01) gives 1.25" double main spacing (center to center). Recommend using calipers to ensure consistent...