DJ,
If one blade lags as the other leads ) that is quite a torque on the mast/hub. What actually happens(in an underslung teetering head)(draw a simple diagram) is that as the blades flap about the teetering hinge, the c of g does not move relative to the mast.
Of course this is nothing to do with Hooke's Joint effect and everything to do with coriolis effect.
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Another day in paradise