wing tip shape - del Klipped 4 reposting..

[John Pavlick]

Del,
 Yes, I realize the primary reason for sealing the gap is to make the
control surface behave more efficently. If you do seal the surfaces it
probably doesn't matter what shape you use (on the leading edge) as long as
it doesn't bind and the gap seal is smooth.

John Pavlick
http://www.idseng.com


> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]On Behalf Of Del Rykert
> Sent: Thursday, November 25, 2004 6:16 AM
> To: discussion at nsrca.org
> Subject: Re: wing tip shape - del Klipped 4 reposting..
>
>
> Hi John.
>     We seal the gap primarily to obtain consistent and equal
> response to the
> deflection of the flight surface.  Granted in a not well supported hinged
> surface it may also encourage flutter and ailerons extended into
> wingtip are
> very susceptible to flutter. With surfaces sealed I see no advantaged of
> rounding the leading edge or not.
>      Happy Turkey Day to all.
>
>                          del
>                NSRCA - 473
>
> ----- Original Message -----
> From: "John Pavlick" <jpavlick at idseng.com>
> To: <discussion at nsrca.org>
> Sent: Wednesday, November 24, 2004 9:38 PM
> Subject: RE: wing tip shape
>
>
> > Hey, That's how they are on my Super Kaos Jr. Not exactly 45
> degrees, but
> > the outboard 3" is tapers toward the tip. If you do this by sanding the
> > bottom edge of the aileron at the tip, you also add a little washout to
> > help
> > prevent tip stalls. Not sure if it's enough to make a
> difference but I can
> > land this plane nose high without any surprises. Someone mentioned
> > rounding
> > the leading edge of control surfaces rather than beveling them - I've
> > always
> > done this unless the surface is really thick (like a barn-door
> aileron).
> > In
> > the 1st U.S. R/C Flight School training manual (the red one) the idea of
> > control surfaces with round leading edges that are slightly
> thicker than
> > the
> > fixed surface is discussed. They claim it reduces flutter
> (without sealing
> > the gaps) and makes the control response less speed sensitive.
> Has anyone
> > tried this? It would be interesting to hear if it works on
> pattern planes.
> >
> > John Pavlick
> > http://www.idseng.com
> >
> >
> >> -----Original Message-----
> >>
>
>
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