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Roadbed options
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 Posted: Thu Jul 13th, 2017 01:57 pm
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Stan S
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James-So when you use foam insulation board instead of plywood for sub roadbed how do you do grades? Are you able to do the cookie-cutter thing and bend the foam board up? or do you add risers to the surface of the flat piece of foam?Stan



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 Posted: Thu Jul 13th, 2017 07:39 pm
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Reg H
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Yep.  The Avatar is trackage at the west end, Henderson.  The station building is now different.  The one in the avatar is a scratch built depot I built some few years ago (styrene) but is really too large for that location.
Thanks for the compliment.  I love handlaying track.

Reg



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 Posted: Tue Jul 18th, 2017 02:57 am
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jtrain
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Sorry Stan, I was offline for a few days.
Anyways, I haven't even given thought to using foam for grades, I try to keep my track as level as can be, even if modeling mountainous terrain.  Some people like the challenge of grades, I don't.
But if you were to do a grade, there's two ways I imagine it could be done...
1) You could ramp up the foam like you would plywood, only using foam supports instead of risers.  I'll bet that the transitions would be smooth at the bottom and top.
2) You could cut the foam out as giant wedges, but the grade would likely be uneven.  Even the most precise cuts aren't perfect when dealing with insulation foam.
I take back what I said if you are doing grades, just do plywood and cork.  Foam board can always be used as subterrain support to build hills and rock faces.
My reasoning was that if you wanted an extremely light benchwork, Foam is a great alternative to plywood.
--James



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 Posted: Tue Jul 18th, 2017 04:05 am
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W C Greene
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Here is a grade made from blue foam cut into strips with slots cut out to enable bending into curves. Also the "grade blocks" were tapered to make the gradients, similar to the Woodland Scenics products but much less expensive. Cork roadbed was glued to the top and track laid on that.

More foam pieces were added and scenery built on top of that. In all, it was a simple process but took some time.

Woodie



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 Posted: Tue Jul 18th, 2017 03:01 pm
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Stan S
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very cool Woodie. I like the idea of cutting the foam into risers, allows you to control the grade, nice work!Stan



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