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Thread: Butt Rib question

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  1. #1

    Join Date
    Jul 2013
    Location
    Lake Stevens, WA
    Posts
    84

    Default Butt Rib question

    I'm fitting the butt ribs on the 7SS
    Is it normal to have such a tight fit and have to cut the butt fit brackets to make it work? Also the aft end of the rib covers 1/2 of the wing mounting bolt? Seam abnormal compared to other photos I've seen online
    The #1 rib is set 35 1/2 " from #3 rib center to center and all ribs of the quick build wing are in the proper location. I see some people are reversing the rib to the other side with the bigger lop facing inward, is this working ok? Any regrets
    Thanks
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  2. #2

    Join Date
    Jul 2013
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    Lake Stevens, WA
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    Default Re: Butt Rib question

    Another pic
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  3. #3
    Senior Member
    Join Date
    Sep 2008
    Location
    Winchester, KY
    Posts
    299

    Default Re: Butt Rib question

    When building my SS7 I found it best to - Swap the ribs from side to side, this will give more edge distance on the overhead glass when installing (less chance of breakout), screws and nuts to the inside. It is normal to have to trim the tail of the butt rib to clear the aft bolt.

    Dick B

  4. #4
    Senior Member jiott's Avatar
    Join Date
    Jun 2010
    Location
    Portland, OR
    Posts
    2,967

    Default Re: Butt Rib question

    I agree with Dick.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  5. #5

    Join Date
    Jul 2013
    Location
    Lake Stevens, WA
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    84

    Default Re: Butt Rib question

    It sure fits better that way

  6. #6
    Senior Member
    Join Date
    Dec 2012
    Location
    Mt Beauty, Australia
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    1,073

    Default Re: Butt Rib question

    I also did the same.

    Ross
    Mt Beauty, Vic
    OZ

  7. #7

    Join Date
    May 2009
    Location
    Lebanon, Or
    Posts
    35

    Default Re: Butt Rib question

    Noticed that the factory is bolting the butt ribs to the mounting brackets; considering this option. My assumption is that these do not need to be structural and the AN526 series bolts would work fine in this situation? Curious as to thoughts on this?

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