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  1. #11
    Wannabe Pilot Laurent's Avatar
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    I will see how I can tighten the screw, if possible without tool


  2. #12
    Wannabe Pilot Laurent's Avatar
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  3. #13
    Captain Dave Morton's Avatar
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    Looks very similar to the kitfox folding wing system Laurent, if your not familiar with that plane it may be worth looking on utube to see how the kitfox wings attach to the rear of the fuselage eliminating the need to lift your wings over the tail, the kitfox can be towed in the wing folded configuration.
    G-HAMS a pretty quick Quik


  4. #14
    Wannabe Pilot Laurent's Avatar
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    No, they don't overlap. Not at all the same device


  5. #15
    Trainee Pilot Trident's Avatar
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    Hi Laurent,

    An interesting idea, but as Madam Breakneck mentions the load is taken on the fastener thread and may not be acceptable. Maybe with a slight redesign, the ball joints could be retained to use as the wing fold pivots, but additional structural brackets with pins in shear could lock the wings in place and take the aerodynamic loads. That could allow your design to work and get off the ground
    Comfortably Numb......


  6. #16
    Wannabe Pilot Laurent's Avatar
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    Thank you Trident I will think about that


  7. #17
    Co-Pilot BobH's Avatar
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    Just to add to the mix,

    I've got a Spectrum microlight. It doesn't have folding wings, but it does use rose joints like Laurent's at each end of the wing struts. These take all the aerodynamic loads from the airframe to the wings, and each rose joint screws into the end of the strut. So on the Spectrum the actual loading is on the thread of each rose joint where it enters the strut. I've attached some photos so you can see what I mean.

    strut rose joint 1.jpg Strut rose joint 2.jpg

    And here's a photo of the bracket at the fuselage end of the strut, showing how the rose joint mounting bolt is held between two plates.

    rose joint bracket 1.jpg

    Perhaps Laurent could alter the bracket he's currently got on top of his fuselage, so that instead of the rose joint being held only at one end by the bolt, the bolt could go through two plates, one above and one below?
    XL's forever! Well, one of them anyway. It's all I can afford, not to mention the Raven and the Mini-Max. Oh, and I almost forgot the Spectrum as well


  8. #18
    Wannabe Pilot Laurent's Avatar
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    Thank you BobH, what is the size of the rose joints, 8, 10?


  9. #19
    Wannabe Pilot Laurent's Avatar
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    Did you read my post Bob?


  10. #20
    Co-Pilot BobH's Avatar
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    Sorry Laurent,

    I hadn't seen your previous post on the 29th, and I've only just seen the one asking if I'd seen your post of the 29th. Regarding the size of each rose joint, I'd have to measure the actual sizes the next time I'm up at the airfield, but they are quite big, possibly 10mm, or the Imperial equivalent, as the Spectrum was designed and built using Imperial fasteners only.

    It struck me as interesting that Madamebreakneck said that your design put the loads onto the thread of the rose joint bolts. I was just pointing out to her and everyone else, that on my Spectrum all flight loads go through a total of 4 rose joints, and each one is held in such a way that the loading is passed along the bolt, i.e. it goes through the thread on each one.
    XL's forever! Well, one of them anyway. It's all I can afford, not to mention the Raven and the Mini-Max. Oh, and I almost forgot the Spectrum as well


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