I'm building two return loops on my HO layout. With full length passenger cars, even 36" radius still looks somewhat awkward in an area that will be a major focal point on my layout. I have therefore made an area 7'x7' so i can have a still larger radius. My question here is what is the formula for figuring the easement radius [if that's the right term] for a given curve. Also, how do you figure the super-elevation for banking a curve. For the first time in my model RRing career i don't have to scrimp on space. Thanks for the input. Curt
Easy - have a computer do it for you 3rd planit not only does a real nice job with easements, they also have a great web page that discusses how to calculate the best offset and length for your easement (without even buying their software.) Rather than re-invent it, check out their web site: http://www.trackplanning.com/design.htm Easements and super-elevation are discussed. One word on super-elevation: moderation. IMHO - the best super-elevation is the kind that you don't even notice until a train is in it. If you can pick it without a train, it's usually too much and you will end up 'string-lining' your long cars.
Curt, My old fashioned way is this: I use an 8' length of pine I ripped from a 1x4, 1/8" thick. After drawing in the tangent and curve centerlines, I spike the strip of wood over the centerlines, it provides a natural easement. For superelevation, I glue wood ties end to end under where the outside of the track ties will be. Each end of these ties is sanded down to provide "ramps". These ramps are at least a foot long and begin on the tangent. Reverse curves look awesome! Gary
