bugdevheli,
I presume a gust would affect both blades. It would have to be a very quick and narrow gust to act within a half revolution of the rotor and only on one side.
If it did do this, then one blade would have slightly more lift and yes, it might cause a very slight movement about the coning hinge, but not much. The same thing would happen on any rotor- one blade would move on it's flapping hinge and the others wouldn't. If it did happen, I would expect a brief vibration to be the result. As Dave said, the centrifugal forces are so large compared to the changes in lift we are talking about, that they dominate.
At any rate, this does not happen as a result of normal cyclic inputs.
bugdevheli, don\'t confuse flapping hinges with coning hinges.
The R22 blades flap about the teeter bolt, just as on the Rotorway or any two-bladed heli.
They do not need to flap about the outboard hinges, as these are for coning, despite the fact that they appear to look like they would act as flapping hinges.