Quick question: If I wanted to have 2 tracks running parallel (HO Scale) around a curve, what is the best distance between them? In other words, if the inner track has a 24" Radius, the outside track would need to be at least what? 26" looks to be too close. Is there a general rule of thumb for this? Do you add 3-4" to the outside? There would have to be enough clearance between the tracks so that cars and loco’s wouldn’t snag each other on the curve.
Have a look here at the NMRA track centers standards.
Normally a 2" seperation is fine on straight track, but with 24" radius curves you will need to go a little wider. The NMRA fhas some data sheets with suggested distances:
http://www.nmra.org/standards/sandrp/s-8.html
Using NMRA Standard S-8, you will see suggested clearances of 1/16" to 5/16" additional for the curves in the radius you are using. With all of the long/wide cars now available, I would do a ‘test’ of the layout of the curve and see what actrually works for you. Our club has 33" minimum radius, and uses 3" centers on all curves, and 2 1/2" track centers on straignt track. Myself, I have a 22" radius curve with a 24.5" radius curve to the outside of that 22" radius curve. My 50’s era engines/rolling stock have no clearance issues.
Jim
Hi Norfolk23, I like your avatar. I took that picture! [8D]
Sure is nifty. I don’t remember where I found it at, but I couldn’t resist it for my avatar. Pretty unique view with the Nationwide building in the background. It’s perfect.