Reply to "Minimum Turnout #?"

Chuck,

"Doesn't a locomotive or long passenger car still have to technically navigate the RCR of 52" even if only for a few inches? Does that short section of 52" cause any problems?"

You are correct.

The RCR is the radius through the closure rail and can possibly cause problems with longer wheelbase locos and passenger cars. I have an alleged #6 but a Mike can't negotiate the closure rail. To be on the safe side, if your minimum radius is larger than the RCR you should go to a higher number switch. The radius of substitution means that the switch can be substituted in that radius curve. For example, I built a #6 and substituted it in an 89" radius curve and since I built the switch I could curve other parts of the switch as well. It worked very well.

I have the room for a 72" minimum and use it. My proposed double track helix will have a minimum radius of 69".

Regards,

9/27/146:15 PM

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