Thanks for everybody's replies. I do understand that gap has nothing really to do with flutter. My main question is what is the effect of flutter on Robert hinges as opposed to CA hinges. I did enjoy the detailed descriptions of the causes of flutter. Everybody here is correct. Gap has nothing really to do with flutter directly. I have seen some planes with huge gaps in them but do no flutter. They do not seem to respond very well or not as much as you think they should. As always, I appreciate the input.

Happy flying and soft landings!