R L Adams foam board question - RC Groups
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Sep 25, 2011, 09:10 PM
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IdahoAir's Avatar

R L Adams foam board question

The "dollar store" foam we have in my area is principally R L Adams foam board, paper backed on both sides and about 4mm with the paper on. Been using it to build electric planes for over a year.

Now I'm working on a more sophisticated soaring glider design and I'd like to know more about its physical qualities.

However, try as I might, I can't find out what "kind" of foam it is. R L Adams doesn't list what type of foam it is anywhere. About all I can find is that it's "acid-free".

Does anyone know? Cheers.
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Sep 25, 2011, 10:26 PM
springer's Avatar
It's polystyrene just like the Dow blucor or PBlll. The only difference is color, cell size/density and absence of a plastic film covering. The part that's acid free is probably the kraft paper on each side. RL Adams also makes the Dow products for Dow in Michigan.
Sep 25, 2011, 10:47 PM
I just want to fly
justwanttofly's Avatar
If your worryed about strenght I econolight and cover the whole plane it makes the plane so much durable with very little weight gain..good luck with the build
Sep 26, 2011, 12:08 AM
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IdahoAir's Avatar
It's poly ... excellent. I'm working on a simple method to "cold form" a 2m wing and it involves some compression of the foam. I also needed to check out its thermal resistance as it will be covered with a lightweight material as well such as Solarfilm Solite. Now, to build the test fixture....

Thanks guys ...
Last edited by IdahoAir; Sep 26, 2011 at 12:16 AM.