Wing stiffness has more to do with control reversal, flutter
has to do with harmonics and balance.

If I had a question about a control surface and I had to fly
the airplane, I would limit speed to Va so that even a full
deflection of the control would not break the airplane.


I've seen pictures of a C210 [old plane with struts] that
took off from a strip near Tulsa with just a little ice on
the ailerons. I got to cruise speed and crashed shortly
there after, the outer wing panels looked like a Navy
fighter with the wings folded.


--
James H. Macklin
ATP,CFI,A&P

"nrp" wrote in message
oups.com...
| But I understand flutter also relies on the original
torsional
| stiffness of the wing being preserved. That if it is not
(i. e. a
| wrinkled wing skin) the flutter margin is reduced. Might
even a
| properly balanced control surface still flutter if the
primary wing
| stiffness is compromised? or is the control surface CG the
only
| determining item? THX
|