I believe the concept and supporting science regarding the need for the shaft to remain horizontal for a brief moment at the top is gold, but with a caveat...that it's performed at the right time, in transition at the exact moment of the pressure shift to the left foot. Performed any other time during the swing = disaster.
You cannot reasonably discuss the science of the golf swing without acknowledging Homer Kelley, and the golfing machine. Particularly when you hold a certification in that teaching discipline , Mr. Jacobs.
I’m not a physicist but I have worked on my swing for 20 years. I disagree with his trebuchet comparison. The most effective golf swing in both power and accuracy is a hub path perfect circle with a fix pivot/fulcrum(the body). The strike is a hockey strike. The best drill of all time is the split hand drill. If you swing your arms around your center in a perfect circle you will find that your hands(hub) specifically the lead hand is in front of the ball position and already on the way up while the trail hand is coming down to strike/impact. You need to keep that feeling when your hands a together. What you will find is the club is is parallel to the ground with the lead hand way in front of the ball position right before it releases. The perfect hub circle allows you to keep the club behind you (lag) so the when you get to impact the club is parallel to ground and release fiercely through impact just like a trebuchet. Manipulating that hand path for speed is a recipe for disaster. Can you do it? Sure. But it won’t produce a significant amount more of club head speed. Not to mention that you are also now timing smash factor (center of face contact) by whipping the club prematurely
The manipulation is not of the hub path but of the direction of acceleration that forms the hub path. The evidence shows that the hub path in the best players is consistently not a perfect circle and that the radius changes throughout the swing. What is a recipe for disaster is radial acceleration in either direction or, in their words, beta force, anywhere in the downswing to impact. What the evidence shows is that longitudinal acceleration is how the best players accelerate the club. Longitudinal acceleration produces the "throw-out reaction" of centripetal force at the bottom of the swing and utilizes the natural forces to keep the club on a consistent path with a minimum of torquing. I was taught that a constant radius, a straight left arm, creates the perfect circle of the hand path, but the best players, save a few, just don't do that, and the evidence in 3D imaging/mapping shows that's what happens. I thought the same way you do until I had a lesson with Lee Deitrick, GSEM, recently and began to study what these guys have been up to. I went out and tried it, I've been dinking around with the feel for years but didn't believe it, and it works really well as the forces on the club are more straight line. The ball flies very straight. Give it a shot, no pun intended.
Super presentation! makes ABG,F,T, E and hub path concepts crystal clear!
Brilliant book. I have just fining reading the book.
I believe the concept and supporting science regarding the need for the shaft to remain horizontal for a brief moment at the top is gold, but with a caveat...that it's performed at the right time, in transition at the exact moment of the pressure shift to the left foot. Performed any other time during the swing = disaster.
You cannot reasonably discuss the science of the golf swing without acknowledging Homer Kelley, and the golfing machine. Particularly when you hold a certification in that teaching discipline , Mr. Jacobs.
I’m not a physicist but I have worked on my swing for 20 years. I disagree with his trebuchet comparison. The most effective golf swing in both power and accuracy is a hub path perfect circle with a fix pivot/fulcrum(the body).
The strike is a hockey strike. The best drill of all time is the split hand drill. If you swing your arms around your center in a perfect circle you will find that your hands(hub) specifically the lead hand is in front of the ball position and already on the way up while the trail hand is coming down to strike/impact.
You need to keep that feeling when your hands a together. What you will find is the club is is parallel to the ground with the lead hand way in front of the ball position right before it releases.
The perfect hub circle allows you to keep the club behind you (lag) so the when you get to impact the club is parallel to ground and release fiercely through impact just like a trebuchet.
Manipulating that hand path for speed is a recipe for disaster. Can you do it? Sure. But it won’t produce a significant amount more of club head speed. Not to mention that you are also now timing smash factor (center of face contact) by whipping the club prematurely
The manipulation is not of the hub path but of the direction of acceleration that forms the hub path. The evidence shows that the hub path in the best players is consistently not a perfect circle and that the radius changes throughout the swing. What is a recipe for disaster is radial acceleration in either direction or, in their words, beta force, anywhere in the downswing to impact. What the evidence shows is that longitudinal acceleration is how the best players accelerate the club. Longitudinal acceleration produces the "throw-out reaction" of centripetal force at the bottom of the swing and utilizes the natural forces to keep the club on a consistent path with a minimum of torquing. I was taught that a constant radius, a straight left arm, creates the perfect circle of the hand path, but the best players, save a few, just don't do that, and the evidence in 3D imaging/mapping shows that's what happens. I thought the same way you do until I had a lesson with Lee Deitrick, GSEM, recently and began to study what these guys have been up to. I went out and tried it, I've been dinking around with the feel for years but didn't believe it, and it works really well as the forces on the club are more straight line. The ball flies very straight. Give it a shot, no pun intended.
Nesbit got this wrong, funny
How so ?