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Thread: Airframes Aluminum Strut Issue

  1. #1
    Steve Pierce's Avatar
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    Airframes Aluminum Strut Issue

    Installed my first set of Airframes aluminum struts today and discovered an issue with the rear strut. Where the front of the strut attach block meets the wing strut attach fittings the joggle that is machined in the strut block hits the strut attach fitting. Called Airframes and talked to engineering and they have never seen this problem before. Called my buddy with these struts and he discovered he has the same issue. Curious if anyone else has run into this?
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    Last edited by Steve Pierce; 05-07-2021 at 06:57 AM. Reason: spelling
    Steve Pierce

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  2. #2

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    That’s real cozy....and the fitting is riveted in so you can’t remove it to machine a relief...what are thinking Steve? Can you relieve the steel fitting on the wing a little bit with a saw blade? Or is that a no no? Looks like it wouldn’t take much. Or maybe a flat file would do it?

  3. #3
    Gordon Misch's Avatar
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    Piper Drawing 10096 shows 3/4" from hole center to bend on the strut. Drawing 14182 shows 5/8" from hole center to end of the attach bracket. I tried to paste in snip from each drawing, but it didn't work. I got the Dwgs from Christian's site - supercubproject.com
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  4. #4
    Steve Pierce's Avatar
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    I waiting on Airframes.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  5. #5

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    Have you tried reversing them, the second pic it looks like they could be directionally challenged.
    Remember, These are the Good old Days!

  6. #6
    tcraft128's Avatar
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    Waiting on this answer! Also, the bolts in the pictures are wrong, there are no threads.
    Turning money into noise since 1996

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  7. #7
    KJC's Avatar
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    Interesting. Is the top deck twisted slightly?
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  8. #8
    RaisedByWolves's Avatar
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    sure would be nice if they made that notch a little longer.

  9. #9
    Steve Pierce's Avatar
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    There is a radius milled in the block of the rear strut where it changes angles. Problem is on the 4 airplanes I have gotten feedback and looked at personally that distance from the edge of the hole to where the radius starts is 3/8".
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    From the edge of the hole to the end of the strut attach fitting on the wing is 1/2". That keeps the parts from laying flat against each other.
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    Steve Pierce

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  10. #10
    Steve Pierce's Avatar
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    Quote Originally Posted by tcraft128 View Post
    Waiting on this answer! Also, the bolts in the pictures are wrong, there are no threads.
    Dang, I wasn't suppose to post that picture of my new weight saving trick.
    Steve Pierce

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  11. #11
    Steve Pierce's Avatar
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    So I have found 4 airplanes with this issue. Doug Keller who does the engineering for Airframes Alaska called and said he has not seen this issue, nothing has changed in manufacturing and it is not a structural issue. He will submit the paperwork to make the change but that will take a lot of time to approve the change from the FAA.
    Steve Pierce

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  12. #12

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    Piper wasn't always consistent, are there perhaps different lengths of Strut attach brackets in the world?
    Remember, These are the Good old Days!

  13. #13

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    Why not take your choice of cutting tool and radius the strut fitting to address interference? It looks pretty minor.

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