Using the NMRA gauge to show the problem with a 1" wide spiral helix. In particular note how the left side of the gauge sits atop the line...
Some more photos of side-swipe and overhang, using my longest cars on two neighbouring tracks to test the actual clear space between them....
Here we see my longest piece of rolling stock - a shiny silver passenger car - and we're looking at how much it overhangs, outside hang I'm...
Here we see my longest piece of rolling stock - a shiny silver passenger car - and we're looking at how much it overhangs, inside hang I'm...
Model wagons on curves "hang out" further than the prototype, thus larger spacing must be maintained around corners to prevent adjacent...