In a discussion at marklin-users.net I found this: For C-tracks there are: R1 = 360.0 mm (14.2 inch) R2 = 437.5 mm (17.2 inch) R3 = 515.0 mm...
Hi all, I got started in the US with Atlas track and a lot of Athearn rolling stock. The Kalmbach book "An HO Railroad That Grows" was a source...