[Mike O]

Been in the incubator for a while. Lurking around on diff tgm sites and talking to other AI´s. Could it be explained as follows?

The Alternate Target Line is the line that the Sweetspot covers, also referred to as the Right Forearm Angle of Approach.

This "Angle of Approach" would be just that for Hitters but for Swingers it becomes an "Arc of Approach" because of the pivot rotation. If no rotation - Hitting - then it's Angle of Approach.


Thanks in advance

Some good information posted here but let's look at your post and clarfiy a few things that may not be obvious in regards to the way you worded your post - probably created by Mr. Kelley's poorly written work.

"The Alternate Target Line is the line that the Sweetspot covers"
No, strictly speaking the Alternate Target Line wouldn't apply to an Arc of an Approach. Per 2-J-3, the Alternate Target Line is the straight line connecting the impact point and low point. The Alternate Target Line is the straight line Angle of Approach of the Clubhead when the Clubhead would be approaching the plane line - in a straight line and not an arc - as viewed by the player. Certainly you did get the "Sweetspot covers" correct, I would just say not in all circumstances would that directly apply to the "Alternate Target Line", i.e. It doesn't reference the "Arc of Approach".

"The Alternate Target Line is the line that the Sweetspot covers, also referred to as the Right Forearm Angle of Approach."
No, the Alternate Target Line refers to the Straight Line Impact points as viewed by the player - for the straight line angle of approach of the clubhead i.e. sweetspot, as stated above. It doesn't strictly speaking have anything to do with the Right Forearm Angle of Approach- see 7-2.

This "Angle of Approach" would be just that for Hitters but for Swingers it becomes an "Arc of Approach" because of the pivot rotation.
I would go a little deeper and consider this a more complete thought: "but for Swingers it becomes an "Arc of Approach" because of the automatic greater pivot rotation caused by the method of acceleration- centrifugal force, compared to a right arm thrust hitting procedure.


"If no rotation - Hitting - then it's Angle of Approach."
You're implying that in Hitting with an Angle of Approach there would be no pivot rotation- nothing could be further from the truth. Sure, less rotation for Hitting than Swinging for any given player, but there is still plenty of rotation compared to no rotation.

I hope there is something in my reply that may help you. I do know that if one were to think that the alternate target line was the angle of approach of the clubhead, the arc of approach of the clubhead, the angle of approach of the right forearm - things would get seriously confusing. Also, if one thought that the primary cause for an arc or angle of approach was pivot rotation - things would get seriously confusing.