Thought I would add my response to a similar thread on Brian's site re: sweetspot and hosel rotation
Take a club and hold it in your thumb and forefinger at the very end of the grip.
Spin it around (or better, imagine you could spin it fast)
(as noted by shootin4par on Brian's site, you can hold it between your palms to do this)
Notice that because of the design of the club, the clubhead spinning in this way travels in a 'circle' - from the tip of the grip end where you are holding it - to the 'center' of the circle create when you spin the club in this way.
The 'center' of that circle is, in effect, the sweetspot
Now - imagine this same picture - but in a horizontal plane....
then in a golf motion....
The hosel (or if it helps to picture it, the shaft) rotates around that 'circle'
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For all the responses and I understand what has been said, BUT it is clear I am either missing a major factor here or ....
If the Clubshaft is to remain FLAT against the Inclined Plane having a Straight Plane Line and the Sweet Spot Plane Line is also straight you can if you rotate at the correct rate, one and only rate to maintain those relationships.
Since Hitters and Swingers 'Swivel' in the Back Stroke at different rates makes this impossible to maintain the above relationships UNLESS the back stroke speed of a hitter and swinger must be different, the hitter having the slower back stroke.
Also if we could easily quanitify this rotation rate per back stroke speed, we could provide a key for a golfer to remain On Plane,.
As for the Down Stroke, same problem exists.
And none of this accounts for LAG or Droop which will again affect the outcome.
One thing we all should be able to walk away from this discussion is that you DON'T want to monitor the Club Head, you DON'T want too focus on the Club Head. It has to be the HANDS else the uniqueness of the stroke will be very open to inconsistencies and create a number of TGM 'X' Components.
It would be an interesting study to see how different the time it takes to make a SWING vs. Hit is, and if there is a correlation. The Tour Tempo method for this might be good.
So when the hands are turned or rolled onto the plane the shaft should point at the ball, and when they aren't the shaft should point just inside the ball. Yes? No?
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