Dear Brian,

http://www.nmra.org/standards/s-8.htmlActually, 2" is a little tight at 26"R, according to the NMRA. You might consider building "psuedo-easements" if you have the room. Bachmann makes things easy by manufacturing all their larger (26"R +) curves in 18 degree sections.

Outer curve: start with one section of 35.5"R, then continue with 28"R sections until the next to the last curve, then end the curve with a 35.5"R section.

Inner curve: start with one 33.25"R section, then 26"R sections, then end with a 33.25"R section.

Hope this helps.

Sincerely,

Joe Satnik