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Old Jun 02, 2001, 12:25 AM
Spritual Pilot
Silicon Valley, CA
Joined May 2001
677 Posts
How to fix a crack of foam wing ?


My simple 400 have a crack in the wing.
What is the best way to fix (or glue) this
crack ? Is there any glue that has a good
penetration, but doesn't melt the foam ?

Thanks,

<img src=http://students.washington.edu/jnyoun/simple400/crack.JPG>
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Old Jun 02, 2001, 12:34 AM
Registered User
Austin, Texas USA
Joined Mar 2001
848 Posts
Epoxy works pretty well with this type of foam if you think you can "smoosh" it into the crack.
I think there are some foam-safe CA adhesives, but I have not used them on this type of foam.

Shawn
Eflightpower.com
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Old Jun 02, 2001, 01:08 AM
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United States, CA, Lake Forest
Joined Feb 1999
6,011 Posts
If it's just cracked and not completely severed I think thick foam-safe CA would work OR Pro-Bond polyurethane glue because it expands while curing and will seep into the pores of the foam well. It is light and sands decent too.
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Old Jun 02, 2001, 07:30 AM
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poobs's Avatar
oakdale, ny, usa
Joined Aug 2000
3,985 Posts
Sorry about the damage - hang in there.

I use epoxy. Drip it in the crack, push it a bit with a tooth pick etc. You can smooth it out on the surface with a thin piece of scrap ply or cardboard like a spatula.

When it dries, try to heat the covering back over it or patch it up.

good luck!
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Old Jun 02, 2001, 08:41 AM
jean-claude Terrettaz
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Carp, Ontario, Canada
Joined Mar 2000
1,463 Posts
I will fix with epoxy and ligth cloth .5 oz , 1 inch wide .Good luck. J-C
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Old Jun 04, 2001, 07:44 PM
Spritual Pilot
Silicon Valley, CA
Joined May 2001
677 Posts

Thanks everyone. The CA attracted me. However, I fixed with Epoxy mainly because I have it. I also enforced the leading edge with balsa wood. It looked too weak to me.

Thanks
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