Spray foam and foamboard.

by jerimiah85 | October 12, 2013 | (9) Posted in Tips

I wanted to share just a little flight tip. So to all who are building flitetest planes with Adams foamboard ( those of us who have it in out country )  here is a little trick i wanted to try out this week. Ok so i crash ALOT due to the fact that im not that great at this flying thing YET. So all the planes i crash seem to crush in the wings. well ive solved my problem with spray foam. Its cheap, Light and they sell it everywhere. so i pumped some into my Versa wing and go it in the air. I crashed it like always, But this time it didnt Distroy the wing. IT BOUNCED :) so this is part one of the two i plan to post. I build the ibcrazy specter and LOVE it BUT i crashed and Broke the wing. I FIXED THAT LOL. HERE SHE IS.

I poked some holes and filled it up. what I couldnt get from the wing tip.

The Spray foam is Sandable and you can paint it . Next artical i will post a flight video my order should be here next week. Questions comments welcome.

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COMMENTS

rcspaceflight on October 16, 2013
I've heard of other people trying this and the expanding foam warped their plane. The expanding foam is just too unpredictable.

I experimented with putting expanding foam into plastic soda bottles. Worked great, but the foam seems to eventually break down for some reason. I think it's the lack of air so it never cures properly. But that was with plastic, not foam board. I also tried poking a bunch of air holes into a bottle, but the foam eventually contracted from the edges. But I used the Great Stuff Large Gap Filler. Not the stuff you used. (Same brand, different formula.)

I just want to give the caution that this might not work as well for every one, or for every time, as it worked for you. I also wouldn't be surprised if the expanding foam eventually breaks down making you regret spraying it in. The stuff can't handle a beating as well as foam board can.
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jerimiah85 on October 16, 2013
With the added foam spars and adding section after section of spray foam I've had no trouble. My versa wing has been filled with this stuff for 2 weeks no problems. Just don't Fill the whole wing at one time. One spar at a time. Thanks for your comment
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uberjay on October 16, 2013
One suggestion / caution is to practice with the foam - if you get too much in an enclosed area word here is it can exert a large amount of stress on the surrounding structure - ie. POP a wing open. I've been meaning to try something like this for a long time, but was worried about this. Maybe I'll just have to try it now ;-).

Cheers,
J
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jerimiah85 on October 16, 2013
I placed a 2x4 on top to let it spew out. But yeah the other side popped open on y versa wing lol.
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Arend on October 17, 2013
I always wanted to try that, good to know it works! In some planes I have LEDs in the wings, do you know how transparent the "good stuff" is?
Cheers Arend
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jerimiah85 on October 17, 2013
it has a yellow tint to it. I don't think led lights will glow through it. I think you cant get the white spray foam and should be good for led lights. thanks for the comment
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eagle4 on October 15, 2013
great tip mate. if its as light as you say it is, then it'd be making the wings pretty solid :)
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jerimiah85 on October 16, 2013
My hobbyking order isn't here yet due to shipping issues I guess. But I'll have the video by next week on a maiden of the plane. And maybe a crash :)
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Slushfund on October 15, 2013
I use the GREAT STUFF Big Gap Filler Insulating Foam Sealant. It expands more and is about 30% lighter. I crash a lot too and use the GREAT STUFF Fireblock Insulating Foam Sealant on the leading edges and nose. Also, let it cure in 70 plus degrees for 24 hours. Otherwise, it makes a stick mess on the grass.....:o(
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jerimiah85 on October 16, 2013
Lol I'm glad others are doing this too. It makes for longer plane life :)
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jerimiah85

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Spray foam and foamboard.