REFLECTOR:Vortex Generators on XL

[Alex Balic]

You shouldn't assume that, because the airfoils are different. What you want
to avoid is sticking the flow to the top of the canard more than it was
designed to since the canard is supposed to stall before the main wing.  If
the canard becomes more stall resistant (better flow adhesion due to well
placed VG's), you will have a big problem unless the wing has the same or
better improvement, since there is some leeway built into the design, you
hopefully won't have a problem, but really, you should get the situation
analyzed professionally before venturing out, otherwise, stick to VG's on
the mains only.........  The VG's will not change the center of lift
appreciably, just move the point of flow separation further back, and allow
the airfoil to fly at a higher angle of attack.

-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
Behalf Of John Dibble
Sent: Friday, December 05, 2003 3:50 PM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:Vortex Generators on XL




Jim Sower wrote:

>
>If one were to install VGs on the wing or canard and not the other, it
might "mess up"
>the "lift ratio".  I used the same VGs in the same pattern and location on
both
>surfaces.  No reason to believe that would "mess up" anything.
>
My SRG is aft cg when I fly solo.  Could I install vgs on the main wing
only to reduce the aft cg situation?

John


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