The 18" wide clubhead was obviously not intended to be a realistic design goal.
Thank God.
Originally Posted by Jeff
It was only created as an "idea" to get across certain concepts - that if Anthony Kim (or any other golfer) swings perfectly on-plane (per Homer's definition of an on-plane swing) and gets to the elbow plane by the 3rd parallel, then he is going to be staying on the elbow plane between the 3rd and 4th parallels.
Jeff, you're missing the whole point. Assuming the Elbow Plane through Impact, the Elbow is indeed 'in Plane', but . . . with what? The answer is: the Sweetspot, and not the Clubshaft. The Clubshaft (the visible) is a close enough representation of the Sweetspot's Centrifugal Line of Pull (the invisible), but it is not quite as precise as some demand. Knowing you were coming (but still didn't quite yet get it), Homer Kelley added this sentence to 2-F:
"So, there is a Clubshaft Plane, and a Sweetspot, or Swing Plane. But, herein, unless otherwise noted, Plane Angle and Plane Line always refer to the Center of Gravity [Sweetspot] application."
You would have the good Mr. Kim held hostage to the Shaft's original Angle of Inclination, yet you move the Sweetspot NINE inches outside the original Plane of Motion. That, sir, is not only bad science, it's downright goofy. Apologies in advance if you consider that last sentence an "ad hominem' attack.
Originally Posted by Jeff
I also think that he is going to have the "feeling" that the sweetspot rotates to the clubshaft plane post-impact (X rotates to B) and there will never be a "feeling" of the hosel leaving the elbow plane post-impact and rotating around the sweetspot.
Whatever. I make no claim as to what other golfers feel. But, I do know that when David slew Goliath, the sling got in line with the rock, not the other way around.
Originally Posted by Jeff
I am not at all convinced that a golfer who mentally thinks of an orbiting sweetspot, but still swings on-plane to the elbow plane by the 3rd parallel (like Anthony Kim), will generate a different clubshaft/clubhead arc of movement than Anthony Kim.
A question posed by yourself, considered by yourself, and answered by yourself. Yet you remain unconvinced. Why?
Originally Posted by Jeff
A question - the baseline of the sweetspot plane must exist outside the baseline of the clubshaft plane. During which part of the swing is the golfer tracing the sweetspot plane (aiming at the sweetspot plane)?
All parts. Per 1-L #6, "The [Sweetspot (which replaces the Clubshaft per 2-F)] always the points at the Plane Line except when they are parallel to each other". And what is the golfer's means of tracing the Sweetspot Plane Line? Lag Pressure. Ya gotta ditch this preoccupation with the Clubshaft, Jeff. It's killin' ya.
Originally Posted by Jeff
Can a golfer practice tracing a SPL with a dowel stick, which doesn't have a clubhead and a rotating sweetspot that is a finite distance away from the longitudinal axis of the shaft in the impact zone?
Of course: Just point the dowel at the Sweetspot Plane Line (normally, the Target Line).
You wrote-: "All parts. Per 1-L #6, "The [Sweetspot (which replaces the Clubshaft per 2-F)] always the points at the Plane Line except when they are parallel to each other".
From my perspective, the sweetspot and the clubshaft are on the same plane when the clubshaft is above waist level (above the third parallel). Therefore, during the early-mid downswing, the butt end of the clubshaft points at the ball-target line (as if the club is merely a dowel stick without a clubhead). Therefore, I "feel" as if it is the clubshaft that points at the ball-target in the early-mid downswing.
From the delivery position to impact, a golfer simply performs a release swivel action that squares the clubface. I do not believe that a golfer can change his on-plane condition after the golf club has passed the third parallel position without "steering". I believe that if I am not perfectly on-plane by the time my clubshaft reaches the third parallel position, then it is too late to alter my imperfect off-plane condition.
Also, the absolute difference between the base of the clubshaft hosel plane and the base of the sweetspot plane reaches a maximum value of about 2" at impact and decreases to zero at the 3rd parallel and 4th parallel conditions. That results in only a small angular difference in inclined plane between the clubshaft plane and sweetspot plane in the impact zone (and which only exists to a significant degree within a distance of about 12" behind/in front of the ball) and that very small difference is something my brain automatically computes on a subconscious level.
Here's a simple little experiment anyone can do (maybe not in the dead of winter though Next time you're cruising down the highway roll your window down. Stick your hand out holding it parallel to the highway. Now rotate it (slowly lest you break something) so your palm faces forward. Notice any difference? Of course you do.
In the golf swing with the club head goes from zero to 100+ (mph) in milliseconds. Do you realize what kind of drag an ordinary clubface experiences at 100+ mph? It ain't insignificant.
When its moving so darn fast why in the heck would the clubface want to turn into the wind? It wouldn't people... it would fall in line behind the shaft/hossel presenting the smallest possible frontal area to the wind (minimizing drag and maximizing entropy). Unfortunately (or fortunately depending on one's perspective) the club face has no choice in the matter. It does what the golfer's hands make it do.
BTW... frontal area is something to think about especially in these days of "game improvement" irons and mega-sized driver heads. Fine but you ain't gonna be able to swing-em as fast... because of drag (form and friction). That's just the way it is folks..
Last edited by no_mind_golfer : 01-25-2009 at 03:00 AM.
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