Re: Airflow over the canard


Jon Finley <finley@...>
 

David,

I'd have to look to be positive but am pretty sure that is where my spinning
tuft is located. What does this mean/imply???

Jon Finley
Q1 N54JF - 1835cc VW
Q2 N90MG - Subaru EA-81 DD Turbo
Apple Valley, Minnesota
http://63.90.191.136/Finley/finley-subaru.html

-----Original Message-----
From: David J. Gall [mailto:David@...]
Sent: Thursday, September 14, 2000 10:33 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Airflow over the canard




My Groups | Q-LIST Main Page | Start a new group!


Larry,

Those spinning yarns at midspan are probably plus or minus about 20
degrees
in line aft from the mid-span elevator hinge, no?

David J. Gall

----- Original Message -----
From: "L Koutz" <koutzl@...>
To: <Q-LIST@...>
Sent: Thursday, September 14, 2000 8:10 PM
Subject: Re: [Q-LIST] Re: Airflow over the canard


>
> Jon
> My tufts (3 of them) mid elevator did the same thing, spin around, that
is.
> I don't remember which direction. What do you think of that!?!
> Larry
>
>
> ----- Original Message -----
> From: "Jon Finley" <finley@...>
> To: <Q-LIST@...>
> Sent: Thursday, September 14, 2000 9:10 AM
> Subject: RE: [Q-LIST] Re: Airflow over the canard
>
>
> >
> > Guys,
> >
> > I've been reading your thoughts and pondering my experiences. I
really
do
> > not know what is happening so any ideas that I may offer are only
> GUESSES!!
> >
> > I do not recall if my tuft "bank" moves one way or the other when
airflow
> is
> > gone/degraded/disturbed/etc BUT I do know that I have one tuft that
likes
> to
> > spin in circles almost all the time. It attached in the middle (both
> > horizontally and vertically) of the left (pilot side) elevator, is
about
> > three inches long, and spins clockwise about the end that is attached
to
> the
> > elevator (with a really small piece of fine tape). Next time I fly I
will
> > pay attention to see if there is a direction that all tufts move.
> >
> > Keep up the discussion - fun stuff!! For all those that are flying -
put
> a
> > few tufts on your canard and tell us what they are doing!! It takes
about
> > five minutes, is free (unless you don't have tape and
> yarn/string/whatever),
> > and you may learn something about your airplane!
> > Jon Finley
> > Q1 N54JF - 1835cc VW
> > Q2 N90MG - Subaru EA-81 DD Turbo
> > Apple Valley, Minnesota
> > http://63.90.191.136/Finley/finley-subaru.html
> >
> >
> >
> > -----Original Message-----
> > From: Ed MacLeod [mailto:ed@...]
> > Sent: Thursday, September 14, 2000 7:49 AM
> > To: Q-LIST@...
> > Subject: [Q-LIST] Re: Airflow over the canard
> >
> >
> >
> > My Groups | Q-LIST Main Page | Start a new group!
> >
> >
> > --- In Q-LIST@..., "L Koutz" <koutzl@S...> wrote:
> > Hi Larry,
> >
> > I have a hard time dreaming up another expaination for the inboard
> > flowing tufts. With the elevators down, you get a strong wing tip
> > vortex at the outer elevator edge. The flow on the top would be
> > inboard. Seal the outer (and inner?) edges of the elevator and you
> > eliminate this vortex flow, the tufts should not flow inboard as
> > readily.
> > This is why they add droopy wing tips to stol aircraft, to make it
> > harder for the vortex to roll back onto the trailing edge of the
wing
> > and disrupting the normal airflow over the wing.
> >
> > As always, I could be wrong.
> >
> > Ed m
> >
> >
> >
> > > Ed
> > >
> > > I don't read the tufts moving inboard together as a sign that air
> > is
> > leaking
> > > through the outboard elevator/ canard gap. I don't know why they
do
> > this
> > > just yet.
> > > Larry
> > >
> > > > Hi Larry,
> > > >
> > > > It sound like the inboard leak phenomenon is occurring at the
> > > > outboard end of the elevator. Does this agree with your
> > observations?
> > > > Perhaps the prop is blasting away the air leaking in at the root
> > and
> > > > the outboard leak becomes more significant.
> > > >
> > > > Ed m
> > >
> >
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > Q-LIST-unsubscribe@...
> >
> > Quickie Builders Association WEB site
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> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > Q-LIST-unsubscribe@...
> >
> > Quickie Builders Association WEB site
> > http://web2.airmail.net/qba321tm/q-page1.html
> >
> >
> >
> >
>
>
>
> To unsubscribe from this group, send an email to:
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>
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>



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