> The last thing you want to do is create a larger draggy tip vortex that doesn't
reduce stall speed.
>Rick Neilsen
>>Redrive VW powered MKIIIC
Rick N.,
It is my understanding, from Nick's emails to me directly, that he intends on
installing droop tips.
Although he didn't state that, I'm pretty sure that's his plan.
With regard to your comment about lift escaping off spanwise from the end of
the wing, I definitely agree
with you. One of the biggest factors that I believe contributes to this is the
high incidence angle of
the Kolb airplane's wings in flight. While this attribute may give Kolb's airplanes
their fantastic flying performance, it also proves that the lift produced
by the wing goes through quite a high pressure gradient difference (in other
words, the air really gets squished going under the wing). The fact that the
stall speed
on the factory Xtra went from 30 MPH to 26 MPH, by installing droop tips proves
this.
In my opinion, all this seems intuitive! If we were able to watch a wind tunnel
test of a "high incidence
wing's wingtip lift loss", I think the results would be predictable, and obviously
apparent, too.
For SOME flyers, altering the original design to include thing's like droop tips
or VGs, serves their flying
needs in some way. Whether it their own limitations, their landing field, or whatever
they deem necessary, they seek a slower landing wing. That is NOT a bad
thing. SOME pilots do NOT see any need whatsoever to alter the original design,
and are quite satisfied with the performance and flying characteristics as
they are, unaltered! Great!! To each his own.
Mike Welch
MkIII
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