Washout?

"cavelamb himself" wrote

Which brings us all back to the question What Is It???
Rectangular wing or soemthing else?

I recall being told rectangular, but only after all of the stall strip
advice began flowing.

As Barnyard said, probably no need to do anything with rectangular, but I
would thing if it was found to be needed afterwards, adding a stall strip
would be easy enough.
--
Jim in NC

Morgans wrote:

"cavelamb himself" wrote


Which brings us all back to the question What Is It???
Rectangular wing or soemthing else?


I recall being told rectangular, but only after all of the stall strip
advice began flowing.

As Barnyard said, probably no need to do anything with rectangular, but I
would thing if it was found to be needed afterwards, adding a stall strip
would be easy enough.


Copy that.

And AFTER test flying to see if it's necessary...

Richard

--
(remove the X to email)

It's never too late to be the person you might have been.
George Elliot

On Tue, 25 Mar 2008 07:00:32 -0700 (PDT),
wrote:

Thanks for all the advice and discussion. Looks like stall strips
could be the way to go. I think I'll experiment with the VGs too.
BTW, the wing is rectangular.

As this is not where they are usually attached and the effect will
probably be greater toward the tips than at the roots I would think
you'd need to be very careful to make certain the effect was the same
on both wings. You don't wan't one wing stalled more than the other
with one having a more pronounced effect than the other ...unless you
are into aerobatics.


Or put a "triangle" shaped addition on the leading edge of the wing's root,
to trip that portion into stall, first.

That's all anyone is after with washout. Keep the outer portion flying,
while the root is stalling.

If it were me, I would probably do a bit of both! g

Advantages of keeping the wing with no washout is that the whole wing will
be lifting at cruise, instead of throwing away part of the outer wing's lift
with added washout.

big john and morgans have it with the triangular strips.

you just tape them on and keep shortening them until you have the
stall chracteristics you need. then you replace the temporaries with
permanent ones.
make both sides identical.
work out where the 3 degree angle of attack neutral point is on the
leading edge and stick them there.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com