Thoughts, hmm? "It ain't gonna fly, Orville." I'm certainly no track-laying expert. I'm not even a novice. But, it seems to me that you are going to have too many easements to account for in order to get it to work right. One or both of the tracks are going to have to gain or lose elevation to get in and out of the curve where both tracks occupy the same tilted plane. On the cramped quarters of a model railroad curve, I just don't see that happening reliably, especially with all those piggybacks you are planning to run. I would encourage you to try it, but I have my doubts...sorry. Here's a question for all you civil engineer-types... On a superelevated curve, is the track tilted about some line that runs along the inside of the curve, or is the track tilted about the center line. In other words, when going into the curve, does only the outside rail go up, or can the inside rail go down as well? - -pat moore - -------------- Original message ---------------------- From: "Tupaczewski, Paul R (Paul)" <paultup_@_alcatel-lucent.com> > > Pat Moore asked: > > > > Wait a minute...on a two-track main line, are both lines > > superelevated independently of each other? That would make > > the spline method a bit more difficult. > > Usually, yes, both tracks would be superelevated independently. I've > always wondered this myself, however, since my layout will have a curved > crossover right on a superelevated curve. The way I'll approach it is > that I'll handlay the curved crossover on the same piece of homasote and > superelevate it as one unit, and then gradually drop the outer curve to > line up with the inner curve so they're both independently superelevated > and at the same height relative to each other. > > Thoughts? > > - Paul > > The Erie Lackawanna Mailing List > http://EL-List.railfan.net/ > To Unsubscribe: http://Lists.Railfan.net/erielackunsub.html The Erie Lackawanna Mailing List http://EL-List.railfan.net/ To Unsubscribe: http://Lists.Railfan.net/erielackunsub.html ------------------------------
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