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Thread: Wingtip Fence design ?

  1. #41
    courierguy's Avatar
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    Quote Originally Posted by RVBottomly View Post
    OSB!? I want to hang out with you for a few days. I thought I was radical with marine plywood. LOL.
    Free scraps no less. If I didn't have a composites whiz buddy, and fellow S-7 flier, I'd use some aircraft ply. CF ought to weigh about nothing.

  2. #42

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    Quote Originally Posted by courierguy View Post
    Me?? Strong 106.

    the plane in the video.

  3. #43
    courierguy's Avatar
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    Something insane, around 300 hp, maybe more!

  4. #44

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    just curious, with that much power how do you tell what wing candy works and what dosent, with 50 hosepower and loaded up then wing stuff would tell the tale of the tape.
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  5. #45
    courierguy's Avatar
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    Agreed, the tips are such a simple mod, that requires no downtime of the aircraft, and so minimally labor intensive, to install in my case, and I'm not even building them, I figured what the heck I'll give them a shot. I'm more a simple and light as possible guy. I think those appearance is kinda cool also.
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  6. #46
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    Tom, Copied the Super Stols after doing my research also. As has been sed , Would’ve been best to extend below the wing but didn’t want one more thing to hit my head on!



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  7. #47
    courierguy's Avatar
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    When I get them done, I'll fly over to Joe Clark's strip, he's Mr.Winglet, and he can tell me what I did wrong. Already have spades hanging down, so used to ducking, think I will stick with just a bit of plate below the wing. Half the fun of mods like these is BSing other pilots on your performance gains! Plus, like you, I'll have a nice flat area to put a sign of some kind on, or artwork.
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  8. #48
    courierguy's Avatar
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    Here's what I have settled on. Aluminum for now, carbon fiber ones on the way. Tuft testing and video camera documentation were considered, as was fluid flow dynamics calculations. I could bore you with my thoughts on span wise flow over a tapered (from the full rib) tip, but it'd just be all BS! I pretty much just pulled this out of my posterior. I realized Chrysler had it figured out long ago, google "1958 Dodge", and you'll see what I mean.

    Again, this is no lose proposition for me, no mods to the plane, the attach points already there, so, what the heck? To my surprise, the results are "slat like." VERY low approach speeds, feel like 2-4 mph less then the already real slow approach my light bird can make. No loss in speed at all though, still as slow as ever.... but no slower. I would never be so casual about adapting this shape if it meant a major mod, adding weight and taking a lot of time, but I think I stumbled upon a trick tip for my particular bird. Nothing to lose, and I for sure seemed to have gained a bit of even lower approach speed at least when landing upslope like I almost always do, and with some power, sub 20 MPH touchdowns.
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  9. #49
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    That is pretty neat, courierguy. I think I'll plan on leaving mounting holes on my wingtips for experimentation.

    Sort of an aside, I was watching some geese land on the Snake River today. I've always admired their final approach in calm winds--wing tips bent down and stable.

    So I was wondering if anyone has ever tried retractable fold-down tips?

  10. #50
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    The XB-70 for sure, but for different reasons.
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  11. #51

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    ive been studying franks wing end plates for some time now.https://www.youtube.com/watch?v=5Nj-Q7VA_xE
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  12. #52
    Lowrider
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    Quote Originally Posted by RVBottomly View Post
    That is pretty neat, courierguy. I think I'll plan on leaving mounting holes on my wingtips for experimentation.

    Sort of an aside, I was watching some geese land on the Snake River today. I've always admired their final approach in calm winds--wing tips bent down and stable.

    So I was wondering if anyone has ever tried retractable fold-down tips?

    Off topic but couldn't help but remember how I loved to see the geese with wings locked and set for landing...and a splash down...when I was goose hunting! Sorry, it just slipped out.
    Somewhere along the way I have lost the ability to act politically correct. If you should find it, please feel free to keep it.

    There are no new ways to crash an airplane no matter how hard you may try!

  13. #53
    skywagon8a's Avatar
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    courierguy, did you notice any change in your aileron response? If not, try extending that fence further aft to reduce swirling around the outboard end of the aileron.
    N1PA

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