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Apollo C15TN wing -Sail Rip in Flight - 01.jpg
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12 Comments

  • Larry  Mednick
    by Larry Mednick 1 year ago
    The luff lines probably helped also. I guess a king post has more advantages than previously thought. :-)
  • Tony  Castillo
    by Tony Castillo 1 year ago
    not sure Larry ... those lines are really not that active in normal flight.. I do not know how they would have help ... look at the luff lines in the video, totally slack in the right wing and likely same in the left.... I think David owes his life to his excellent piloting skills AND the under surface... not degraded.. kept some of that together ... a complete rip upper/under would have not been controllable.
  • Abid Farooqui
    by Abid Farooqui 1 year ago
    Pretty amazing that even after this he was able to fly the wing down to the ground and trike is in one piece as well
  • Abid Farooqui
    by Abid Farooqui 1 year ago
    This wing is toast now but it was toast before he ever flew it because the whole sail was UV degraded regardless of flight hours. He just did not know it because testing just the bottom surface
  • white eagle
    by white eagle 1 year ago
    Abid cant see it that well but it looks to me that it was mainly the grille ncv poly that failed . The orange looks like dacron even though it shows uv damage may not have blown out if the whole top surface was the same! please advise plus what would you say is the best combination of long lasting matierials that you would choose in a wing regardless of cost?
  • Michael Kocot
    by Michael Kocot 1 year ago
    Not sure if color fade on the leading edge shows proof of uv damage. Those neon colors tend to fade quickly as compared to blues, black, reds. I wonder if the stitching failed by use of chemical cleaners on the wing?
  • white eagle
    by white eagle 1 year ago
    Michael. I think that clearly is uv degregation on the top le.
  • white eagle
    by white eagle 1 year ago
    If you look at the feathering along the tears its more clear that the stiching held but the matierial failed?
  • monty stone
    by monty stone 1 year ago
    hey white eagle, stainless steel.!
  • Abid Farooqui
    by Abid Farooqui 1 year ago
    Hi Guys:
    I am fairly certain I have seen this wing with that trike on Apollo's website in 2003. That picture is still there. This trike belonged to someone else in Sweden long time ago before the current owner.
    If the above is correct then this wing, trike and sail are about 13 or so years old. There is a point where the sail needs to change. Aeros Profi uses this NCV material on top as well and its a pretty nice material and lasts a fairly long time but not forever. Nothing does. In 10 years you ought to think about changing the sail regardless of hours unless you locked your trike up in the dark and never touched it for 10 years. Usually at 1000 hours of use, sail should be mandatorily replaced in most cases and so should the leading edge tubes. At 500 hours a sail off inspection should be done of all the tubing and the sail. Betts test should be conducted on top and bottom surface both annually or every 100 hours including stitching. Many manufacturers provide extra patches sewn on top surface that can be sent to them for more proper evaluation. Neon or non neon colors do not matter, UV degradation is UV degradation and it shows easily on colored dacron. It is expected. Usually each flight hour is equated to 2.5 UV hours under normal use but some users like instructors in Hawaii leave their trikes outside and that is each day a 10 to 12 UV hour day. I do not know enough about this particular wing's history to comment on it but at 10 years of age, it probably should have gotten its sail checked at the factory and probably replaced and the leading edge tubes checked and possibly replaced.
    Hey, I am still waiting for all the SLSA owners and their mechanics to ask me about how to get the bettsometer even though its a required thing to test the wing each year. Only a few ever have. Not my responsibility to babysit supposed certified mechanics signing off annuals.
  • monty stone
    by monty stone 1 year ago
    natures 'darlet slit' creation!.
  • white eagle
    by white eagle 1 year ago
    Btw monte. I was thinking of tightly woven brillo pads. You could leave the blue stuff in and leave you wing in the rain, self cleaning
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