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egp8111
Joined: 25 Mar 2010
Posts: 49
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 Posted: Thu Apr 15, 2010 9:33 am Post subject: Flapperon foam repair |
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Is there a way to repair the flapperons if the interior foam ribs have deteriorated ? Can you open the flapperons up for inspection ? These have sat out in the weather for a period of time. thanks
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Fri Apr 16, 2010 6:16 am Post subject: Re: Flapperon foam repair |
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| egp8111 wrote: | | Is there a way to repair the flapperons if the interior foam ribs have deteriorated ? Can you open the flapperons up for inspection ? These have sat out in the weather for a period of time. thanks |
I'm just thinking out loud on this so take it for what it's worth.
The flaperon skin is epoxied to the foam ribs. There are a lot of ribs as they are spaced about four inches apart. The top and bottom of the trailing edges of the skin are epoxied together at the factory and riveted by the builder.
You can drill the rivets out and pop the trailing edge open and see if it has delaminated from the ribs. It should be fairly easy to pop the trailing edges apart. Mine were starting to pop apart on their own before I riveted them when they were new. You may be able to pry it open enough to peek inside at the ribs too.
Now if you see that some of the ribs need replacing you would most likely need to figure out a way to repair them in place as replacing them would require taking the flaperon apart and starting from scratch with it...I think.
You can tell a lot about the condition by just squeezing the skin with your fingers along each foam rib. You can see and feel where they are fairly easily.
If the drain holes were drilled at the trailing edges at each hinge and they were stored so that any water would drain out the holes they should be okay I would think.
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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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egp8111
Joined: 25 Mar 2010
Posts: 49
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| Posted: Fri Apr 16, 2010 4:53 pm Post subject: Re: Flapperon foam repair |
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on closer inspection the foam ribs appear OK but it have become unglued from the skin. No drain holes or pop rivets in the TE. Can it be re-glued and riveted ?
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Fri Apr 16, 2010 6:37 pm Post subject: Re: Flapperon foam repair |
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| egp8111 wrote: | | on closer inspection the foam ribs appear OK but it have become unglued from the skin. No drain holes or pop rivets in the TE. Can it be re-glued and riveted ? |
Yes. It can be re-glued with hysol and riveting is done by the builder as part of the building of the kitfox.
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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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