AmFlyer posted:Most S scale steam engines seem to need at least a 36" minimum radius.
Well, not quite.
The River Raisin brass NKP Berkshire will negotiate my 33" radius curves, although admittedly the RR SP MT5 4-8-2 won't. AM's scale wheel Northerns will handle at least 30" radius curves. My old Sunset Models Challenger (when it ran) could also handle 30" radius curves.
Rusty