Response to Austrains' announcement of a C30 tank and C30T
An Announcement from Austrains - SDS acquisition
Connecting loco and tender - Hornby Top Tips
Trainorama 830 class 847 review
Under the Portuguese Sun - Tree planting
Bachmann new GWR Earl Class review
Reconnecting with a childhood hobby
James May urges nation to 'save Hornby' as shares plunge 62%
Hornby boss quits after third profit warning in five months
Statement from Ixion Model Railways Ltd
I'm finishing off the last piece of my track-plan - that being "The Helix".....
I've been perusing the numerous articles/posts on MRH on this topic and have pretty much decided to go the route of using trapezoidal sections to build it.
At this point my helix will be ovular, single-tracked, 32" radius with a 12" straight section. This yields an approximate grade of 1.85%.
If you care to add in the "helix compensation factor", in my case that adds another 1% effective grade for a total of 2.85%.
In the the other discussions/posts, people discuss using various thicknesses of plywood. Some double-up on the thicknesses when using the trapezoidal section method - usually starting with 3/8" thick ply - resulting in 3/4" thickness at the end of the day. Seems like a tad over-kill to me....
My question - if I plan to use a single thickness of plywood, what is the thinnest I can get away with and still have a solid finished product? I plan to butt-glue them together with biscuit joints. What has been everyone's experience in this area?
Also, I've read some discussions where there was a mention of using masonite as the sub-roadbed. I can't imagine this being strong enough to resist sagging over time. Anyone use a non-traditional sub-roadbed material that would care to comment what their experience has been and why they chose that material?
This article first appeared on model-railroad-hobbyist.com
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