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Old 04-16-2007, 08:58 PM   #1
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Sheeting foam wings

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I am in the midst of building a simple series extra 230. In the scant plans/instructions they make no mention on sheetign th foam wing. Is sheeting them nessasary. This plane would be 35" wing span and weighs in at about 19 0z. Was thinking of going electric with it. Specs for a .07 engine. If sheeting the wing what to use for applying the sheeting to the foam. The wings are white foam fairly hard density.
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Old 04-16-2007, 09:28 PM   #2
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With this size of plane, you need to keep the weight to a minimum. Therefore you are best to use a spray adhesive such as 3M 77 spray or Elmers contact spray adhesive. The 3M brand has changed to a newer formula which eats foam. The Elmers brand is safe to use.

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Old 04-17-2007, 04:59 AM   #3
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Sheeting a 1/2A foam wing is usually not necessary and would probably add too much weight. I would recommend that you use fiberglass packing tape about 1/2 inch wide and run a strip along the length of the wing where a main spar might be if it was a built-up wing. You can cover foam with iron-on plastics that require low heat like Solar film or equivalent.
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Old 04-17-2007, 05:16 PM   #4
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foamy womg sheeting

On my last foamy, I covered the wing and fuse with clear packing tape which I bought from Staples. It is their store brand which is thinner and lighter than the 3M clear tape which thay also carry. I put it on both sides -adds some stiffness without too much weight
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Old 04-17-2007, 05:59 PM   #5
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I carry an adhesive that is specifically engineered for sheeting foam wings. It's called Aerobond, it's a waterbased adhesive that has no fumes and stays flexible when dried.

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Old 05-11-2007, 12:27 PM   #6
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Originally Posted by planecrazy
I carry an adhesive that is specifically engineered for sheeting foam wings. It's called Aerobond, it's a waterbased adhesive that has no fumes and stays flexible when dried.

I've never used Aerobond, but for the dozens of balsa or 1/64" ply sheeted foam wings that I have completed over the years, I have always used simple ordinary water based contact cement. Its quick, odourless, easy water clean-up and I have never had a failure or delaminating. It may be less expensive to use than a brand name specialty product. But, back the original question, balsa sheeting a small wing is probably not required and will definitely add unnecessary weight.

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