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Old Sep 25, 2011, 09:10 PM
IdahoAir is offline
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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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Old Sep 25, 2011, 10:26 PM
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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.
Old Sep 25, 2011, 10:47 PM
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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
Old Sep 26, 2011, 12:08 AM
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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.


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