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Thread: Epoxy primer inside spars

  1. #1

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    Default Epoxy primer inside spars

    All,

    I am planning to epoxy primer the inside of the wing spars. How much does it take to do that?

    I saw posts about someone using an airbrush gun on a long piece of PVC. Someone else just put a tennis ball in to cap each end, and sloshed primer around inside. I will do the tennis ball method I think. Any idea how much I should order? I was just going to order the epoxy primer from kitfox.

    Thanks

    Scott

  2. #2
    Senior Member Esser's Avatar
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    Default Re: Epoxy primer inside spars

    I think about a quart per wing should do it if I remember correctly. You want extra so you know you covered everything. I, too, did the tennis ball method.
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  3. #3
    Senior Member jmodguy's Avatar
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    Default Re: Epoxy primer inside spars

    Eastwood.com sells a wand with a 360 degree spray head for spraying inside automotive panels. Check it out
    Jeff
    KF 5
    340KF

  4. #4
    Senior Member jiott's Avatar
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    Default Re: Epoxy primer inside spars

    I'm pretty sure I did all four spars with less than a pint, using tennis ball method. Pour in plenty to get a good slosh, then drain it out and reuse on the next spar.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  5. #5
    Senior Member jrevens's Avatar
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    Default Re: Epoxy primer inside spars

    I did the tennis ball thing. Cover the tennis balls with Saran Wrap.
    John Evens
    Arvada, CO
    Kitfox SS7 N27JE
    EAA Lifetime
    Chap. 43 honorary Lifetime

  6. #6
    Senior Member aviator79's Avatar
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    Default Re: Epoxy primer inside spars

    I should have done that!

    I made a little mess because the primer soaked through the fuzz on the tennis ball. I think I used a quart per two spars - I could have done all four, but I only worked on one wing at a time. Most of what you put in comes back out, but as Josh said, you need plenty of excess to make sure you get a good slosh.
    --Brian
    Flying - S7SS

  7. #7
    Senior Member
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    Default Re: Epoxy primer inside spars

    Priming the inside of the spars is a waste of time, money. Adds weight and makes a mess too.

  8. #8
    Senior Member aviator79's Avatar
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    Default Re: Epoxy primer inside spars

    If anyone is qualified to say this, it's you. But you didn't have to completely submerge them just to make your point.
    --Brian
    Flying - S7SS

  9. #9
    Senior Member efwd's Avatar
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    Default Re: Epoxy primer inside spars

    Wow, quite a statement. I notice the "inside" of the spar is a waste but no mention of the outside. Living around the ocean, I wouldn't want to see what the inside or the outside of the spar would look like a few years from now if it weren't primed.
    Eddie Forward
    Flying
    SS7, 912iS, Garmin G3X

  10. #10
    SSFoxBuilder's Avatar
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    Default Re: Epoxy primer inside spars

    Has anybody considered CorrosionX or Boeshield T-9 as a spar corrosion preventative? I was planning on this at some point.

    Both are usually applied as a mist and will "set up" a nice protective coating, probably more than sufficient for most Kitfox users...
    Dustin
    915is/AP430 powered Kitfox SS7

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