flimflam,
In a normal two blade teetering system like a Bell 47 or Hiller the blades are forced to flap as a unit. The hinges on a R-22 allow individual blades to flap alone when hitting a sharp gust. It has been known since Cierva invented the flapping hinge that a lead/lag hinge would be needed as well.(after he found his free to flap blades failed in lead/lag)
A hinge is a hinge no matter what it is called.
What prevents the R-22 "coning hinge" from working as a flapping hinge?
slowrotor