i think you mean 14.12 - yes, it's Rory and Bobby. Of the two, much though i'm a fan of Rory, i'd say Bobby was even better. i hadn't noticed the no divot irons, though - are you sure about that?? Ah, looking at it again, i see what you mean - but i'd say he's playing a long iron (maybe a 2 or 3), for which it's normal to not take a divot.
nice of you to say so, but actually there are some mistakes in the 5p model presented here - the arms don't swing as shown, they swing up and down, not side to side, and they are not the 4th pendulum in the kinetic chain either! the mistakes have been corrected in a new and improved 6p model th-cam.com/video/3E5ZHde_7rc/w-d-xo.html&ab_channel=djhbrown
Thanks to Ben Hogan and his Five Lessons I discovered lateral shift of the hips has the same effect on the rhythm and tempo as the metronomes on the coke cans at 2:30 in this video. Hogan suggested sitting down with stance wide enough to put support on the insteps of both feet when standing like an A. That allows rocking forward flat on the front foot as a “forward press” action to start the takeaway then back laterally just enough to put the back foot flat on the ground and raise the outside of the lead foot. The downswing is initiated by rocking back to a flat front foot with lateral shift of hips forward. That slight lateral movement of the hips mades a huge different in the rhythm of a golf swing. The goal in the takeaway is to let the club force do the work of pulling the club head mass and arms up effortlessly. Hogan’s wide sweeping outside the hands accomplishes that task effortlessly. On the way down one should not lose sight of the fact GRAVITY accelerates mass at the rate of 32 ft. per second, per second and that just letting gravity pull arms and club down to the point it can whip around the hands will produce more club head acceleration that trying to sweep it into the ball with an aggressive shoulder turn. The best ball strikers keep their back foot on the ground in the downswing which forces the hips to stop and lock at 45° open and the shoulders lagging hips by 45° to stop parallel to target. At that point they SIDE BEND with the the spine to keep the hands moving forward as club head whips around them into the ball, lifting the back heel to allow hips and shoulders to turn again just as the ball releases off the face of the club. In that swing style most of the acceleration of the club head comes from the whipping action around the hands not the rotation of shoulders and arms as most beginning golfers assume.
most of my fellow players (average age about 65) still throw themselves at the ball with steam coming out of their ears, and don't believe me when i say the slower i swing, the further the ball goes :) i prefer to think of the swing as a compound pendulum rather than a whip, to remind myself to not snatch or press at anything. Sam Snead says the lighter your grip, the easier it is for your wrists to flex, without your having to think about it. th-cam.com/video/RZ1b79epY1c/w-d-xo.html&ab_channel=djhbrown
It's a nice pragmatic explanation of the golf swing but unfortunately has been questioned by the research done by Brady C Anderson (2007) on 500 golfers (with a handicap of 5 or less). His results showed that there is no transfer of kinetic energy in a proximal to distal sequence. The research article is titled: Speed Generation In The Golf swing: An Analysis of Angular Kinematics, Kinetic Energy and Angular Momentum in Player Body Segments. But it is over 146 pages long so it takes a lot of reading and quite a bit of physics knowledge.
thanks for introducing me to Brady's work, which makes interesting reading even though his models and data are not quite right; eg his Figure 4.1.1 shows the hips rotating hardly at all and the arms rotating a lot in an imaginary swing plane - neither of which is true in a real swing of a good player.
You need to read section 3.5 about how the body segments is defined (confused me terribly at first). The Hips segment is not just the 'Hips' , because they contain the feet, lower legs, thighs and the pelvis.
I just read research articles with quantitative data about the golf swing rather than qualitative theories. Tedious stuff but it helps me get a better perception of what is happening in the golf swing from a physics standpoint.
it's certainly 3-dimensional, but my feeling is that it's more helical than conical. Viewed face-on, it does look as if it's narrower at the top than the bottom (whence a cone), but viewed down-the-line, it's narrower at the bottom than at the top. but it's not exactly helical, as it's radius does change due to cocking/uncocking of the wrists, which is not mirrored up and down - it's the last thing back, and the last thing forward, as illustrated in my new model.
I think that was Bobby Jones at 15:00. Just poetry in motion. Wooden clubs and no divot with irons!
i think you mean 14.12 - yes, it's Rory and Bobby. Of the two, much though i'm a fan of Rory, i'd say Bobby was even better. i hadn't noticed the no divot irons, though - are you sure about that?? Ah, looking at it again, i see what you mean - but i'd say he's playing a long iron (maybe a 2 or 3), for which it's normal to not take a divot.
Another gem.
nice of you to say so, but actually there are some mistakes in the 5p model presented here -
the arms don't swing as shown, they swing up and down, not side to side, and they are not the 4th pendulum in the kinetic chain either!
the mistakes have been corrected in a new and improved 6p model
th-cam.com/video/3E5ZHde_7rc/w-d-xo.html&ab_channel=djhbrown
@@Silly.Old.Sisyphus oy vey!!
Thanks to Ben Hogan and his Five Lessons I discovered lateral shift of the hips has the same effect on the rhythm and tempo as the metronomes on the coke cans at 2:30 in this video. Hogan suggested sitting down with stance wide enough to put support on the insteps of both feet when standing like an A. That allows rocking forward flat on the front foot as a “forward press” action to start the takeaway then back laterally just enough to put the back foot flat on the ground and raise the outside of the lead foot. The downswing is initiated by rocking back to a flat front foot with lateral shift of hips forward. That slight lateral movement of the hips mades a huge different in the rhythm of a golf swing.
The goal in the takeaway is to let the club force do the work of pulling the club head mass and arms up effortlessly. Hogan’s wide sweeping outside the hands accomplishes that task effortlessly. On the way down one should not lose sight of the fact GRAVITY accelerates mass at the rate of 32 ft. per second, per second and that just letting gravity pull arms and club down to the point it can whip around the hands will produce more club head acceleration that trying to sweep it into the ball with an aggressive shoulder turn.
The best ball strikers keep their back foot on the ground in the downswing which forces the hips to stop and lock at 45° open and the shoulders lagging hips by 45° to stop parallel to target. At that point they SIDE BEND with the the spine to keep the hands moving forward as club head whips around them into the ball, lifting the back heel to allow hips and shoulders to turn again just as the ball releases off the face of the club. In that swing style most of the acceleration of the club head comes from the whipping action around the hands not the rotation of shoulders and arms as most beginning golfers assume.
most of my fellow players (average age about 65) still throw themselves at the ball with steam coming out of their ears, and don't believe me when i say the slower i swing, the further the ball goes :)
i prefer to think of the swing as a compound pendulum rather than a whip, to remind myself to not snatch or press at anything.
Sam Snead says the lighter your grip, the easier it is for your wrists to flex, without your having to think about it.
th-cam.com/video/RZ1b79epY1c/w-d-xo.html&ab_channel=djhbrown
It's a nice pragmatic explanation of the golf swing but unfortunately has been questioned by the research done by Brady C Anderson (2007) on 500 golfers (with a handicap of 5 or less). His results showed that there is no transfer of kinetic energy in a proximal to distal sequence.
The research article is titled: Speed Generation In The Golf swing: An Analysis of Angular Kinematics, Kinetic Energy and Angular Momentum in Player Body Segments.
But it is over 146 pages long so it takes a lot of reading and quite a bit of physics knowledge.
thanks for introducing me to Brady's work, which makes interesting reading even though his models and data are not quite right; eg his Figure 4.1.1 shows the hips rotating hardly at all and the arms rotating a lot in an imaginary swing plane - neither of which is true in a real swing of a good player.
You need to read section 3.5 about how the body segments is defined (confused me terribly at first). The Hips segment is not just the 'Hips' , because they contain the feet, lower legs, thighs and the pelvis.
@@jackflash8756 are you Brady's dad? You seem keen to promote him :)
I just read research articles with quantitative data about the golf swing rather than qualitative theories. Tedious stuff but it helps me get a better perception of what is happening in the golf swing from a physics standpoint.
Arm and club form a conical pendulum.
it's certainly 3-dimensional, but my feeling is that it's more helical than conical. Viewed face-on, it does look as if it's narrower at the top than the bottom (whence a cone), but viewed down-the-line, it's narrower at the bottom than at the top.
but it's not exactly helical, as it's radius does change due to cocking/uncocking of the wrists, which is not mirrored up and down - it's the last thing back, and the last thing forward, as illustrated in my new model.
Thanks for the nice video!