Re: Balloon loop track question?

It is very rare to find anything built for permanent use over 24 degrees or 238.73' radius.

You can measure them yourself with a 62' long Chord and mid point ordinate (between center of chord and rail) would be 1" equal 1 degree. Or you can use 31' chord and mid ordinate would be 1/4" would equal 1 degree. You may need a partner or two to hold the chord, and chalk mark the rail in advance, and take the mid measurement.

As you know the Uintah Ry had 88 degree curves in its main line and they were reduced to 66 degree after the 2-6-6-2T were introduced, so take you choice what every you want to use on your model railroad.

Sincerely, John Emp.