Good idea on the face it Dave, but I think you are confusing teetering wityh flapping. The Bell UH1 two bladed system, for example, teeters like the first sketch, ie the same as a "see-saw" might. However, it flaps like the second sketch (minus the elbows), th4e flapping occuring from the end of the hub tangs and along the blade itself. Even two bladed systems (though I know Lu disagrees here) allow individual blades to flap independantly of the teeter.
...................least I think so!
