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About KevinRyan

  • Birthday 12/28/1941

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  • Location
    Melbourne Australia
  • Interests
    Golf swing physics
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  1. KevinRyan


  2. 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
  3. 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
  4. 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
  5. 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
  6. 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.
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. Severtheties, I am glad you think it is cool. When I first saw it on the computer model my eyes poped out. I am finishing off a book. I have been doing many experiments with my own swing to develop a teaching method so that it should be possible to learn how to do it. Because it is an effect of physics, not muscle, it feels a bit wierd. The clubhead releases so fast with very little effeort. As I get better at doing the RYKE effect I still get a surprise at how the ball flies. It is for this reason I want to find out what other golfers feel when release happens. Kevin Ryan
  13. I became interested in how the golf swing works about 15 years ago when I retired. I started with books, then started downloading videos of pro swings and then Research papers from University academics from all over the world. What I discovered was that nobody in the world, including the manufacturers of golf clubs knows how the swing works. There are millions of opinions, but very few provable facts. What this means is that the whole Golf Industry is based on uncertainty and some philosophers may say that is a good thing. I am a golfer who wants to know how it works even if I can't do it. I would like to know why I am not as good as the pro who hits the ball 300 yards. What does he have that I don't and what does he know that I should be able to learn. I started using computer modelling techniques 7 or 8 years ago as a way of understanding the swing, because I knew the answer must be in physics, not in individual opinions. Using these modelling techniques I believe I have discovered a number of new mechanisms that start the process of understanding what happens in the 250 milliseconds when a pro can accelerate the clubhead from zero to 120 mph. If we understand what happens, then I believe all golfers should be able to learn how to do it, or why they can't do it. The "BIG PICTURE" is that in the last 100 years the handicap profile of golfers has not changed. All the hype about equipment has had no influence on the handicap profile of golfers. I am aware that a model is only as good as the assumptions that go into building the model. What I need to assess now is whether the model is telling me a truth about the swing. Today I am introducing the RYKE effect which is what I believe happens at release. It is a piece of physics that has not previously been understood or described, which I believe is fundamental to understanding why pros play a different game to most of us. You can help me to assess if the RYKE effect is what happens when you release during the golf swing. To introduce the RYKE effect I would ask you to watch these two videos: This is a presentation that I gave to the World Science Congress of Golf in September last year. It takes about 15 minutes. This is a short video that repeats the RYKE effect many times so that you can see what is happening. The questions I have are: "Can this piece of physics be applied to release in the golf swing?". "What do you feel or experience at release?" . "Does knowledge of the RYKE effect help explain release?" I look forward to any comments or questions you may have. Kevin Ryan
  14. Good to see a number of other Aussies in the field. Thanks for the welcome from all of you. I feel comfortable already. I am hoping to post tomorrow. A couple of small details to fix. Kevin Ryan
  15. I am an obsessed golfer. When I retired as a Consulting Engineer about 15 years ago I started playing 3 times a week. I was able to get to a 9 handicap after a few years and then my obsession was redirected to the physics of the swing and why professionals can hit the ball so far and so accurately. This led me to building a computer model of the golf swing which I have been using to understand how and why the swing works. After 7 or 8 years, I believe I have found a number of new physics effects that can fully explain how the swing works and, among other things, why golf robots do not test clubs correctly. I am currently writing a new book, which I expect to finish in a few months. I am also rebuilding my own swing to comply with the physics I have learned. Just as mygolfspy is passionate about honesty in golf equipment marketing, I am passionate about ensuring I get the physics correct and that biomechanics can execute the physics. There is so much instructional advice on the web that we don't know what is correct and what is not. I want to help change these perceptions by understanding the fundamental physics. Before I finish and release the book, I would like to see some discussion about the first and most important of these physics actions. I have called it the RYKE effect. I looked at the other golf forums and it was obvious that mygolfspy was the right place to get honest and open discussion from real golfers I will post a new forum topic called "The RYKE effect" in a few days. I hope the mygolfspy community can help me to describe the physics so that all golfers can understand these new concepts. Kevin Ryan
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