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About KevinRyan

  • Birthday 12/28/1941

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    Melbourne Australia
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    Golf swing physics
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  1. Wildthing and Grasmere5, Let me answer both your posts with a macro observation. We have been led theoretically "by more experienced experts or golf scientists" for at least the last 30 years and as a result of their research, handicaps of ordinary golfers have not changed. I think we are now entitled to ask why: Are their fundamental models correct? Why hasn't their theories been able to be put into effect by the thousands of golf instructors who have been to their costly seminars. Can we find one instructor who has a record of long term improvement of most of their students by 5-10 shots. Maybe the age old system of peer review of academics by academics has not worked in understanding the fundamentals of the golf swing. Maybe it is time that totally new models are developed and properly evaluated by the "more experienced experts", instead of the reactions I have had in the past, "you only have an engineering degree, what could you possibly teach a professor with a PHD." My current research is very encouraging and when I am satisfied with my findings I will finish the book. Kevin Ryan
  2. Mygolfspy_TCB, Thank you for your comments. You have made some interesting observations in your post about observing Pro golfers. At this stage I am still working to understand Clubhead speed and while understanding the physics is very important, I am moving more and more to the biomechanics and observing the detailed angles that pros use. At this stage I will not provide advice to anyone until I can prove that I am correct. Keep up your observations. Kevin Ryan
  3. Wildthing, This was an analysis I was doing some 8 years ago. As with any analysis, there is an endpoint where you need to say "this has been useful in explaining a part of the problem, but we need to move on to understand other aspects of a very difficult problem. For example is there any relationship between Ground Reaction Forces and the swing or what role does weight shift have in the swing. The human body has been able to "invent" many different mechanisms to achieve its goal (the swing). Maybe the Double Pendulum model and anything related to that bit of physics is past it's used-by-date. I have moved on in my investigations and therefore going any further forensically with this topic will not be very useful. Kevin Ryan
  4. Grasmere5, Your observations about distance from a 15 year old girl is precisely the reason that for the last 20 years I have been obsessed in trying to understand the physics of how they achieve this Clubhead speed and why I am questioning all the physics fundamentals of the golf swing. Kevin Ryan
  5. Wild Thing, Interesting that you found a patent application of mine that tried to develop a club with a bent handle that would replicate the Ryke Effect. The patent was rejected because a prior patent had been granted ( I think for a putter). I built a few prototypes that were mildly successful but could not achieve the increase in clubhead speed that pros achieve. You suggest that the SMK passive club squaring torque is the same as the Ryke Effect, however they are very different. If you watch The full Ryke effect video you see that the RE is caused by an increasing torque around the lead arm that is caused by an active transverse force or torque on the lead arm that forces the hand path inside its starting path. At impact. this produces the Ryke Angle that we see in pro golfers. The SMK passive torque is produced because the club shaft is offset from the arm path. As the arm continues on its original path the passive torque reduces as the club shaft and arm shaft come into alignment at impact. There is no Ryke Angle at impact. This is a very weak Torque compared to the increasing torque of the Ryke Effect that both rotates the lead arm and the club along the shaft. I am not yet prepared to publish because I think the Ryke Effect is only part of the story of the swing. Until I can explain the Clubhead speed problem I will continue to investigate. Kevin Ryan
  6. Sheriff, I am no fan of the golfing machine. I want to use only Newtonian physics. I agree it is very difficult to learn. In my case I believed the physics was right and that enabled me to know what forces needed to be applied and when. Almost every swing thought I had had for 50 years had to be changed. I am getting better at it and in the process I am developing a few techniques to ensure the correct forces and timings are correct. I will release a book when I am confident those techniques work. Kevin Ryan
  7. Sheriff and Blade, Thanks for those comments. When I started this thread I was looking for these sort of comments. The feeling of effortless speed. When I first learnt how to do it, I would get a surprise. "What just happened." I think that is because it is a physics effect and not a muscle action (eg hitting with a hammer). Kevin ryan
  8. I will try to answer the last few posts with another short video. I have had trouble explaining this RYKE effect concept and it took me a long time to get my head around the concept. When I did get my head around it, I started to understand what the downswing does and that there needs to be a change of direction part way down in the swing. What you will see in the video is Steve Stricker's swing. He does not set his wrists and therefore they don't unhinge. He shows that you can achieve pro clubhead speeds without unhinging the wrists. He shows that in the first part of the downswing you can store energy using a small wrist angle which gets released rotationally as a conical pendulum, which very accurately straightens the clubface. http://youtu.be/L0h1N5Un_Fg Kevin Ryan
  9. Your comments that "wrists unhinging" and "That action is increasing club head speed dramatically" are certainly the common understanding of the golf swing. If you look along the bays of a driving range, that is what you see. Everybody is trying to "unhinge" faster. I have come to the conclusion that this is a very significant mindset problem that we have. I would like to encourage any handymen out there to build a model of the wrist. I built this model a few years ago to try to understand how the wrist works in the golf swing. The video forced me to rethink about "unhinging" and more about "forearm rotation" in the downswing and what you need to do to promote the forearm rotation rather than the unhinging of the wrist. Is the model correct? Biomechanics specialists may disagree and provide a different view of how the wrist works. I think this is the central question to be answered before we fully understand what happens in the downswing. Kevin Ryan
  10. The double pendulum model gives golfers the completely wrong impression of the golf swing. That is, that wrist release is used to hit the ball. The RYKEeffect is a three dimensional version of a more complicated double pendulum (two joints not one) that shows that if you get the forces timed correctly then it is forearm rotation that hits the ball, not wrist release. I think you are correct that good instructors understand the 3D nature of the swing, but to my knowledge the RYKEeffect model is the first science based attempt to show what happens in the downswing and for that reason it is important. Kevin Ryan.
  11. You are certainly understanding the point I am trying to make. It has long been considered by Golf Science that it requires muscular effort to shut the clubface for impact and we hear talk from instructors about controlling the clubface. The RYKEeffect model shows that by pushing a double pendulum off its plane, release is all about forearm pronotion and not wrist release. It is that fundamental to understanding how the swing works. Physics shuts the face: not muscle. If we can produce the sideways force, at the right timing, to push the double pendulum off its plane, then wrist release stops and forearm pronotion takes over and shuts the face. I am assuming pronation means forearm rotation with a firm left wrist and no collapse of the wrist. Like you, the more I learn how to feel the effect, the faster the clubhead speed with very little effort. I am also finding that you need to fully rotate your forearm -90° backwards in the backswing to ensure that it can release 180° in the downswing. Kevin Ryan
  12. Your wording of a "different take on what the swing truily is" best describes what I am finding and at the moment the physics and biomechanics can't yet describe what happens. So physics and biomechanics have to catch up with how pros swing. If we can do that then we can develop the methods to make it happen. Kevin Ryan
  13. The model uses the left arm so it is a right hand swing. When we build models we try to get down to the simpliest version of what is being modeled. If we assume that the left arm is straight during the swing then it is valid to only model one of the arms that are producing the forces on the club. If we then move the arm in a particular direction we can then determine where the forces or torques are coming from. So we can infer what the right arm is doing. I have currently identified at least four actions that the right hand and arm must do in order for the RYKE effect to happen. That is why it is so difficult to achieve, and why I am still working on developing the drills that are necessary to make it happen. Kevin Ryan
  14. jaxbeachpackerfan and Silver and Black,There is no simple secret to golf. Certainly holding hands low is part of the puzzle. As I was writing the section on the downswing it took 12 pages to explain my understanding of the physics mechanisms that are in play in the quarter of a second of the downswing. What I am trying to get golfers to understand with the RYKE effect is that one of the fundamental truths is that wrist release ( hammer action) is wrong and that forearm rotation with a RYKE angle is how the best golfers swing a club. That is the starting point. I hope to be able to contribute in a small way to develop techniques that everyone can use, but we have to understand what is happening first. Kevin Ryan
  15. PlaidJacket, Thanks for the complements. Your post shows that golf is a great game. I played today as I do 3 times a week. I love the small side bets. I love the uncertainty of not knowing what is going to happen next. I love the competative chit chat. I love the beer at the 19th. Everyone can take something from every round. But I also know that there is an Everest to be conquered. We know very little about how and why the swing works and why a 5 foot tall young girl can hit a ball further than you or I who have been playing for 40 or 50 years. At 72 years old today I hit a few drives that were longer and straighter than I ever hit when I was 30. I hope I am uncovering truths about the swing and not kidding myself. I get encouraged that I might be on the right track when I hit a few longer drives or chip and pitch shots that check and back up. That's why it is such a great game: we can all approach it in different ways. Kevin Ryan
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