What is the recommended minimum radius for a return loop using Peco Mainline 009 track and operating r-t-r L&B bogie stock. Rob Orchard
As wide as you can allow! The tighter it is the more friction and the less your locos will pull... Though it's not the minimum I'd suggest 12" is a good compromise.
I tend to agree 12 inch radius is a good basis.
Brian Meldon
I've gone for a minimum of 12" radius on my layout. This allows my brass kits to get round okay without shorting