Argh! I'm trying to figure out the correct dimensions for a spiral easement into a 36" radius curve, and the online resources I've found so far are just giving me math anxiety.
I understand how to bend a stick, all I really need to know is how to determine the amount of offset between the circular curve and the straight track, and the length of the easement from an point with the same x-coordinate as the centre of the 36" circle. Most of the references in magazine articles and books I've read give information for circular curves no larger than 30" radius. It seems quaint to call those "broad" curves by current standards.
Anyone with any useful advice please help.
Regards, Andrew