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Thread: Rib stitching problem

  1. #11
    Senior Member aviator79's Avatar
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    Dec 2016
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    Los Alamos, NM
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    913

    Default Re: Rib stitching problem

    Quote Originally Posted by Esser View Post
    I didn't use hysol between the tank and rib. I figured the wooden spacers were stiff enough.

    I didn't either. The gap was pretty large, and I don't think a Hysol bridge across that gap really does anything for you except make it hard to rib stitch. If Josh's fuel tanks fly out when he flies his plane (You are going to fly it, right Josh?), maybe I'll re-think it.
    --Brian
    Flying - S7SS

  2. #12
    Senior Member jiott's Avatar
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    Jun 2010
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    Default Re: Rib stitching problem

    I installed my tanks more to the outboard side to give more room for the fittings on the inboard side. That made the tank-to-rib gap pretty narrow on the outboard side, and quite wide on the inboard side. So I only filled the outboard gap with Hysol (and drilled it for rib stitching).
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  3. #13
    Senior Member Dusty's Avatar
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    Dec 2012
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    Christchurch, New Zealand
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    378

    Default Re: Rib stitching problem

    My tank to rib gap is about 1/4 inch.I assume there is no hysol,as there is a lot of flexing between the two which has caused the paint to start failing.
    A bridged joint would possibly eliminate this.

  4. #14
    Senior Member
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    Nov 2017
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    Default Re: Rib stitching problem

    My tanks were not square, and I had to do some trimming on the right tank to get it to fit in between ribs 1 and 3. The hysol bridge is about 5/16” on the outboard side of the tank. The tanks also had some twist to them so they rocked a bit. The hysol is pretty hard, so I decided to drill through the top and bottom of the tanks to allow rib stitching, instead of drilling through the hysol to save time. This is going to be awesome.

  5. #15
    Senior Member colospace's Avatar
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    Oct 2009
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    Littleton, CO
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    Default Re: Rib stitching problem

    I did the same as Jim and for the same reasons.
    - Gary
    S7 SuperSport Tri-gear
    w/Rotax 912, Oratex, Dynon

  6. #16
    Senior Member
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    Aug 2016
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    Melbourne, Australia
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    Default Re: Rib stitching problem

    Quote Originally Posted by colospace View Post
    I did the same as Jim and for the same reasons.
    Same here ....
    David
    SS7 Builder

  7. #17
    Senior Member Delta Whisky's Avatar
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    Dec 2017
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    Amissville, VA
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    637

    Default Re: Rib stitching problem

    Quote Originally Posted by Flyboy66 View Post
    Perfect! Next, addressing the potential fuel leak.

    Just slosh your tanks, that should take care of any leaks.

  8. #18

    Join Date
    Mar 2012
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    Nampa, ID
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    100

    Default Re: Rib stitching problem

    You need to pressure test the tanks if you actually drilled through the flange. It would have been better to drill the Hysol.....

  9. #19
    jonstark's Avatar
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    Nov 2013
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    Ashfield, MA
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    Default Re: Rib stitching problem

    Quote Originally Posted by Delta Whisky View Post
    Just slosh your tanks, that should take care of any leaks.
    Sarcasm nugget of the week!
    Kitfox IV 1050, C180. Now I have two backcountry planes! WooHoo!

  10. #20
    Senior Member Cherrybark's Avatar
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    Dec 2015
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    Near Tyler, TX
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    509

    Default Re: Rib stitching problem

    Sloshing the tanks after they are installed in the wing might seem like a daunting task. There may have been a thread discussing attaching a washing machine motor to a wing rotisserie to make the job easier. An advance thread search might be required.
    Carl Strange
    Flying
    SS7, 912iS, Oratex, G3X

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