On Jan 3, 12:39*pm, Eric Greenwell wrote:
wrote:

Here is the sailplane wing flutter video I was referring to:

http://www.youtube.com/watch?v=kQI3AWpTWhM

You can see the flutter is symmetric with several waves from tip to
tip.

When I pause the video, I can see one tip is up while the other tip is
down. Isn't that asymmetric flutter?

--
Eric Greenwell - Washington State, USA
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Your definition is, of course, correct Eric. I looked to me like once
the flutter was established it was symmetric. I'll take another look.
I think the symmetry or assymmetry may be aside to the main points of
the discussion as it isn't clear to me that it would necessarily
indicate anything one way or the other on the issue Andy raised about
control surface interaction and certainly not on the ballast question.

9B