graviman,
You started out so well on this thread, noting how RC aircraft are stabilized, and now you are sliding off into the never never land of blade flapping as some kind of stability solution. Heaven help us from the designers who think more and varied hinges and complex configurations will solve the helo's handling problems, when simple stabilizers can be bought on computer cards for a buck!
The only true solution to stability and control for future helicopters is in electronic systems that are cheap and powerful, not in screwy mechanisms that seem to be stable, but are really just complex.
Stay with the electronic theme, it is the winner.
Also, the Lockheed Cheyenne was a loser from the start, but nobody remembers its flaws, they just remember the marketing hype that was spread about it when it was being sold. The program was cancelled for technical reasons that had no solution. That stabilizr bar did not work very well, in fact it needed a good old fashioned electronic stability system anyway. The stab bar went unstable at high speed, and caused at least two accidents, one that killed the crew. I'll bet you didn't see that on any marketing web site!