Re: The Helix
Posted by Keith Hayes on Nov 04, 2017; 10:01pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/The-Helix-tp9915p9949.html
The second loop.
Rising about 4 1/2" per circuit on a 30" radius with a 12" straight section works out to a hair over a 2% ruling grade.
URL: http://c-sng-discussion-forum.254.s1.nabble.com/The-Helix-tp9915p9949.html
The second loop.
Rising about 4 1/2" per circuit on a 30" radius with a 12" straight section works out to a hair over a 2% ruling grade.
Keith Hayes
Leadville in Sn3
Leadville in Sn3
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