> Thoughts, hmm? > > "It ain't gonna fly, Orville." 8^) > 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 What happens is that the outside rail is made to rise above the inside rail some distance before the point of tangency (the end of tangent track going into the easement). I believe that one railroad engineering type (as contrasted to a railroad engineer) told me that the specified amount of superelevation is reached at the midpoint of the easement. Whether, in some cases, both rails move (compared to level), the inner down, the outer up, I can't say (no pun intended), though my impression is that the inside rail remains level. In any event, the opposite happens at the other end of the curve to return to level. SGL The Erie Lackawanna Mailing List http://EL-List.railfan.net/ To Unsubscribe: http://Lists.Railfan.net/erielackunsub.html ------------------------------
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