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Thread: Poly Fiber Fuselage top cover

  1. #1
    mholton63's Avatar
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    Question Poly Fiber Fuselage top cover

    It's been a while since I covered my last Tri-Pacer and I can't remember how I covered the top of the fuselage. I think I put the seam down the middle. Does any one know if you can put the seam down the middle? It seems like I read somewhere lately that your not supposed to do that. I have the bottom, and sides covered in that order. Thoughts?

    Any advice would greatly be appreciated.

    Mark

  2. #2
    mmoyle's Avatar
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    Default Re: Poly Fiber Fuselage top cover






    Sent from my iPad using Tapatalk Pro

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    Administrator Steve Pierce's Avatar
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    Default Re: Poly Fiber Fuselage top cover

    What system are you using? Polyfiber says you must glue to a structure which would be a Longeron or use an envelope. Stewart's does not. Have tested glue joints with pull tests and the fabric failed before the glue joint did.

  4. #4

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    Default Re: Poly Fiber Fuselage top cover

    I do a sewn seam down the middle, top of fuselage and vertices stabilizer all together. You aren’t supposed to do a glued seam on a stringer, but a sewn seam is OK. Piper did a lap seam on the stringer originally, but that was with cotton and nitrate dope sticks a lot better to cotton.


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    mholton63's Avatar
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    Default Re: Poly Fiber Fuselage top cover

    Quote Originally Posted by mmoyle View Post





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    Did you sew where the seam is on the tail section 6"ish on both sides?
    Last edited by mholton63; 04-06-2022 at 12:15 PM.

  6. #6
    mholton63's Avatar
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    Default Re: Poly Fiber Fuselage top cover

    Quote Originally Posted by Steve Pierce View Post
    What system are you using? Polyfiber says you must glue to a structure which would be a Longeron or use an envelope. Stewart's does not. Have tested glue joints with pull tests and the fabric failed before the glue joint did.
    I'm using PolyFiber

  7. #7
    mmoyle's Avatar
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    Default Re: Poly Fiber Fuselage top cover

    Quote Originally Posted by mholton63 View Post
    Did you sew where the seam is?
    Nope. Covered the bottom first, then the sides to include the vertical stabilizer, then the top. The only fabric glue seam is just ahead of the vertical stabilizer. The only place/s I used the French seam was on the wings…Didn’t want those seams on the fuselage as felt my eyes would see that first as a flaw. Used Superflight system 7.


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