Re: The Helix

Posted by Pat Student on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/The-Helix-tp9915p10005.html

Jim

This method doesn't present clearance problems by itself. Consider the combination of the elevation difference between the entry and exit points, the maximum grade allowed (hence the number of turns to gain the elevation), thickness of the subhead bed, and track radius;  adjustment of one eliminates any clearance issue.

From you photo it appears the you used 1 X 4's on edge (3 1/2").  I used, I believe, 4 1/2" long supports with Homosote road bed with no clearances issues including the entry/exit points having vertical transition curves.  K-36 / K-37's no issues. Scale: Sn3, of course.