[Vaako]

This may be inconsequential to the plane line tracing discussion, but from the clubmaking forums I frequent I have seen the following regarding clubhead/shaft lead (bending forward toward target) and droop:

-The maximum amount of lead or droop is determined by the Center of Gravity (CoG = Sweetspot?) of the head. Theoretically, the shaft should be able to bend no more than in-line with the CoG.
-This maximum amount of lead or droop is by no means always guaranteed and is dependent on swing and shaft characteristics.
-While the centrifugal force is primarily reponsible for this bending toward an in-line condition with the CoG, it is also creating a force that pulls outward (away from the golfer) which creates an effect called "centrifugal stiffening" with the net result being that the forces requried to bend a shaft in motion (in a rotational sense) can be much higher than those required to bend a shaft at rest.

Can you give some pointers to "centrifugal stiffening "discussion? I've been ignoring club building forums for some time and quick googleing seems to point to useless abstacts.


Vaako