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5407Re: [ksurfschool] Bow .vs. SLE

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  • hungvu2000@rogers.com
    Nov 23, 2006
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      Don, Bruno and some others have made some experiment about "double skin"
      inflatable in the past. It's never gotten to the market stage
      successfully..

      Hung.

      George Sarris wrote:

      >I believe that kite designers can improve on their
      >designs in one other way. That being the drag
      >produced by turbulence around the leading edge
      >bladder. They have improved in making the LE bladders
      >smaller in diameter and this has required increased
      >pressure for the kite to hold its shape. However, I
      >wonder if there have been any experiments with adding
      >another "skin" to smooth out the bottom of the kite
      >reducing the turbulence and the drag making it more
      >like an airfoil.
      >Just curious.
      >
      >Cheers,
      >George
      >
      >--- hungvu2000@... wrote:
      >
      >
      >
      >>I have been using and playing with a number of bow
      >>(or almost bow) and
      >>SLE kites in the past year.
      >>
      >>What I have found is that SLE is better in term of
      >>stability (remember
      >>the flatter is less stable formula with Seasmik) and
      >>jumping performance
      >>(the Sled Boosting effect). On the other hand, the
      >>bow is probably
      >>better in term of speed performance (less fabric,
      >>lighter kite for same
      >>construction)
      >>
      >>So at one end you have SLE like Waroo, the other
      >>end, you have bow like
      >>the Crossbow, and a bit compromised Waroo-Pro (this
      >>is between SLE and
      >>mid-SLE), SwitchBlade, One, etc.
      >>
      >>The flatter the kite, the more concave the trailing
      >>edge need to be
      >>(probably only a true bow kite need to have concave
      >>trailing edge) or
      >>use a trailing edge bridle like the Seasmik.
      >>
      >>It is very interesting to observe that the flat kite
      >>revolution that
      >>started with the Seasmik, the Nexus (a bit too foil
      >>oriented), this
      >>experiment:
      >>
      >>
      >>
      >http://www.template-toolkit.org/tpc5/kitesurfing/index.html
      >
      >
      >>(has both curve LE and bow trailing edge) , the
      >>Flexifoil curve leading
      >>edge (probably taken from the previous experiment),
      >>the bow patent
      >>application from Bruno and ended with the SLE.
      >>
      >>Personally, the main reason why I want a SLE/bow
      >>kite is for this reason
      >>
      >>
      >>
      >http://sports.groups.yahoo.com/group/kitesurf/message/67005
      >
      >
      >>(and the
      >>market in 2006 has probably showed the preference).
      >>
      >>Hung.
      >>
      >>
      >>
      >
      >
      >
      >
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