[Mike O]

Philly...
Hinge action has the feel of the entire Left arm flying wedge executing a hinge action around the Pin whilie controlling the Clubface Motion...whereas... swivel rotates the shaft around the sweetspot with the lower portion of the arm independent of the hinge action...When you come down ...I'll show you...


Hinge Action - Clubface...
Swivel - Shaft Rotation around Sweetspot

AS

No offense Annikan but the fact that the Shaft rotates around the Longitudinal Center of Gravity or as you said the Sweetspot (see Glossary) is completely separate from Swivel (independent forearm rotation- compared to clubface closing as a result of the turning body or orbiting arms i.e. hinge action). Take swinging- the longitudinal center of gravity- that line from the grip through the sweetspot- is the line of pull- the shaft is completely subservient and helpless - and therefore rotates around that line of pull.

In addition, for further clarification- the shaft rotates around that longitudinal center of gravity, not the sweetspot. The sweetspot just happens to be that point on the clubface that the longitudinal center of gravity passes through the clubhead.

Mike O.