Why is it so hard for people to understand that flutter is 100% the result of turbulence at the control surface hitting the two sides back and forth at the right frequency to resonate with the surface? It's not that hard to understand. For those wanting an common example, hold a piece of paper out the window while driving. The tail end of it will flop in the wind. That's flutter, and anything held in a fast moving wind can do it. For another illustration, go push a kid on a swing. If your're observant, you'll noticed that each swing back and forth takes the same amount of time no matter how high the kid goes. When you are pushing, you are adding energy at the swing's resonant frequency causing its oscillations to increase in amplitude. Good linkages can minimize it and can save your airplane when it happens, but they do nothing to prevent it. Everything can flutter. It's just a matter of at what frequency the turbulence has to hit it to make it resonate. (btw, search for "resonant frequency" on Wikipedia if you don't understand what I'm talking about) The only things that can prevent flutter are to change the resonant frequency of the control surfaces by using lighter and stiffer materials, or by mass balancing them to move their CG ahead of the hinge line to accomplish the same thing. In the swing illustration, doing either of these is like shortening the chain so that the frequency of swings gets faster. If you can only make 20 pushes a minute and the swing naturally swings 25 times a minute, you'll never get the thing going high like the kid wants. Likewise, when you raise the resonant frequency of your control surfaces beyond the speed of the turbulence that will hit them you eliminate the possibility of flutter. Good linkages and good hinges can minimize flutter's damage, but they can't do anything to prevent it from happening.