Posts Tagged ‘swing plane’
My good friends Tim and Simon Cooke from GolfPrep on Hilton Head Island recently brought their new Flightscope X2 out to Berkeley Hall. Our objective was to learn more about the numbers that TrackMan and Flightscope are putting out and we wanted to get a sense of how well one machine performed relative to the other.
I have pondered the best way in which to convey my findings and have finally committed to just simply jotting down my thoughts. My intent is certainly not to create controversy or confrontation – these are simply my own honest impressions from the day. Please also keep in mind that I am a TrackMan owner and supporter and no matter how I attempt to remove my bias I doubt whether I am able to remove all of it…
- Prior to the test I had been having trouble with my TM unit giving unusual spin numbers every 30-40 shots, something it had never done before. As a result I had contacted TM support and was informed that I more than likely had a bad USB cable. I was also informed that the classic indicator of a bad cable would be a “double” or “half” spin. Sure enough during the test TM gave out three spin numbers from the 60 shots we hit that were right around double what the FS reported. I have since replaced the cable and have yet to see a spin rate that seems odd.
- As you peruse the following thoughts keep in mind that good players , which all three of the test subjects were, are very good at controlling the direction the clubhead travels (angle of attack and club path) from shot to shot. The direction may not be ideal, but better players are consistent with clubhead direction. That means that dramatic changes in either of those categories, along with sizable changes from shot to shot in club speed, were going to draw my attention and raise a red flag.
- Since running the tests I have spoken to many “in the biz” people about radar interference. It was mentioned that the machines, when set up side by side as we had them, will occasionally give corrupted data due to the influence of the outside radar. I have not run enough tests to ascertain if this is or is not the case, but during the testing the FS seemed to give a few numbers that were incorrect and this could be due to the TM being directly alongside the unit. The TM did not do anything different to what it normally does as it seemed to be unaffected by the additional radar.
- If a shot off turf has a decent size divot TM will only provide ball data and no club data, whereas FS reported both ball and club data for just about every shot hit off the ground. On the occasions that FS reported club data and TM did not the numbers did not look correct – meaning the attack angle and/or club path seemed to be too far from what the subject would normally generate. We hit numerous 50 yard pitch shots and TM did not offer any club data while FS reported for most of these shots. The problem was that the club path was said to be almost 15 degrees from in to out along with a spin rate of 14,000 rpm – just not happening! I actually preferred that TM did not provide club data as I would rather have no information than have to explain away improper information. That being said I would love a radar that provided correct club data on all shots.
- With both units unplugged and PC’s powered down the TM (2:05) was aligned and ready to roll in about half the time of the FS (4:16). I was told that with an iPad the FS can be aligned and operational in far less time.
- We noticed that both machines reported different Swing Plane numbers when they were moved (flipped positions) relative to the same golfer. I have tested this before and the changes in data are due to the hardware in the TM II. Each machine appeared to provide better data when the golfer is hitting shots aligned with the center of the unit – something that was not possible when running two machines.
- We tested the ability of each unit to report gear effect, by logging the point of contact on certain drives and then comparing each units Face to Path and Spin Axis numbers. The TM reported gear effect as I would have anticipated and most of the time FS reported along similar lines. However the first shot we examined, a big heel hit, was actually reported by FS as being a slight toe side hit. TM reported a Face to Path of -9.3 and a Spin Axis of -5.4 while FS reported a Face to Path of -2.2 and a Spin Axis of -11.0
- I was amazed at how closely aligned the Spin Rate numbers were for each machine. Unless there were dramatic differences the spin rates were almost always within 100 rpm’s.
- There seemed to be quite a few instances during the testing where the attack angles were not even in the same ball park. I had nothing to help me determine which machine was correct, other than the aforementioned fact that better players tend to be very consistent, and all too often it was FS reporting wide ranges of variation from the player.
Keep in mind that my intent is merely to report what I observed and not to offend anybody or any entity. I could tell that Tim and Simon were a little concerned with the results and they went home and performed additional tests. I am happy to report that the FS performed much better without the influence of additional radar and when shots are hit from the center of the unit. Tim’s follow up comment to me was:
I believe that side by side testing, although seeming to be a good idea, does not work. Clearly there was some radar interference at work as the inconsistent numbers were not reproduced in stand alone tests. Maybe the only way you can really compare the units is with extreme high speed cameras with the units working independently of one another.
I would have to agree with Tim’s sentiments and I have started to make plans to have each unit test the same golfer on the same day, but without the potential interference of outside radar.
You know I’ll report back on that one….
When I tested my old college driver a few weeks ago my interest was piqued by how close my swing speed with the 43.5 inch club was to my current 45 inch driver. I have heard that altering the shaft length of your driver by an inch can/should alter the club speed by up to 4 mph. This called for a test…..
Using TrackMan my idea was to test the same golfer, clubhead and golf ball, but change the shaft length. I took my current driver, which is the Titleist D3 8.5 degree (B1) with a 45″ Motore F3 70 gram stiff shaft and tested it alongside the same head (B1) with a 43″ Project X 82 gram stiff shaft. Essentially a driver shaft versus a 3 wood shaft. I had recently came across a 42.5″ well kept old Wilson Staff JP persimmon driver with a steel shaft and decided to include that in the testing.
I hit 11 shots with each club and eliminated the data for the poorest shot with each club. I was using fresh Titleist NXT Tour golf balls and it was a perfect 80 degree day with little wind. The results were astounding!
With all three clubs my tendency was to hit up on the ball with a slight in to out club path. My swing plane was very consistent from shot to shot (which surprised me a little actually) and the clubface was almost always slightly open at impact. This path and face relationship led to an average shot shape of a slight draw. Here are the numbers:
45″ Driver Shaft
- Club Speed 101.3 mph
- Ball Speed 151.6 mph
- Spin Rate 2697 rpm
- Launch Angle 11.3 degrees
- Carry 245 yards
- Total 272.2 yards
- Height 76 feet
43″ Three Wood Shaft
- Club Speed 101.1 mph
- Ball Speed 150.0 mph
- Spin Rate 2100 rpm
- Launch Angle 14.0 degrees
- Carry 249 yards
- Total 278.7 yards
- Height 84.3 feet
42.5″ Persimmon Driver with Steel Shaft
- Club Speed 93.4 mph
- Ball Speed 141.2 mph
- Spin Rate 2115 rpm
- Launch Angle 10.3 degrees
- Carry 206.4 yards
- Total 246.4 yards
- Height 48 feet
I couldn’t believe it! I hit my driver with a 3 wood shaft further, higher, with less spin and above all else – straighter. Take a look at how much straighter: (yellow – driver shaft/purple – 3 wood shaft/ white – persimmon)
I also totaled the distance (after roll) the ten shots with each club finished from the center line:
- Persimmon – 182 feet (average 18″ off line)
- Three wood shaft – 234 feet (average 23″ feet off line)
- Driver shaft – 315 feet (average 31″ off line)
On my Andrew Rice Golf Facebook page I asked readers if they had any experience with shortening the shaft of their driver and here are a few of their responses:
“I just went to a 44″ and am loving it! Longer then my 45.5″ and straighter too!” GT
“Went to 44″ and more consistent with no loss in distance” AvS
“44″ Callaway…more fairways AND more distance!!!” CL
“Went to 44″ and I hit it more solid further and straighter” PW
“44″ this year. I agree it is far better. Middle of the face more often.” SF
“I found it made me less steep through attack so I have lowered my spin rate and launched it about a degree higher” AB
By the way – most of the above quotes are from full-time professional golf instructors. So what can we learn from this research?
Having tested a few golfers with shorter shafts it seems to me that each golfer has a ‘threshold’ length – an ideal length that gives them the optimal combination of speed and accuracy. For some that threshold could be 46″ while for others they perform best with a 42″ driver. The only way to find out is to get yourself with a teacher or fitter that has access to Trackman and various shafts.
Another point to note is that while the 3 wood shaft had a slightly slower club and ball speed the shots were longer…why? Notice how the launch angle was higher while the spin rate was lower. A perfect illustration of the term ‘high launch low spin‘. Launch the ball higher to get more out of your tee shots.
What can we learn from the ‘persimmon‘ data? While that shaft was even shorter than the 3 wood shaft it was substantially heavier. I believe the 3 wood graphite shaft was almost 50 grams lighter than it’s steel counterpart which would explain the almost 7 mph difference in club speed. The size, or lack there of, of the head was intimidating in the beginning, but as I went through the shots I became more comfortable. I believe that practicing with a smaller clubhead like this can only be beneficial in the long term for any serious golfer.
My feeling standing over the shorter club was better and almost every golfer I tested reported the same sense. The club feels easier to control and many golfers have reported a feel that they can ‘get through‘ the shot better. I really felt like I could smash it without it going off line – a nice feeling!
Physics says that longer shaft + lighter shaft = faster club speed = more distance. On paper that might be true, but when the human element is involved everything changes. The next time I tee it up it will be with a substantially shorter shaft in my driver…but that’s just me!
Around this time of the year I like to look back at the year and contemplate what I have learned as a teacher and coach that will make me better in the future. After much thought here is my list:
- Golfers too often lose sight of the fact that the game is all about scoring. It’s not about style, or aesthetics, or form – it’s about function. And scoring is function. If any golfer can go out and hit the ball the same as they always have and shoot five strokes lower they are very happy. No, this is not something new to me, but as I get older and hopefully wiser, I see way too many golfers who miss this point. They are searching for a swing, a technique, a “holy grail” that will upgrade their game. The answer lies in driving, wedging, putting and a hefty dose of hard work – period!
- Anybody can get better in twenty minutes. With the help of Trackman I have seen this time and time again. The challenge is taking “ownership” of the changes as this can only be done through practice. Through practice you get comfortable, you then begin to trust the changes, which in turn channel into confidence – the magic elixir of all sport.
- The driver works much better when it strikes the ball with an upward hit. If a golfer swings at 100mph and strikes the ball with a 5 degree downward hit, they will be 28 yards shorter than a golfer who hits the ball with the same swing, but a 5 degree upward hit! The launch angle goes up, the spin goes down and boom, you’re not even swinging any harder.
- With an on plane swing, when the clubhead moves towards the ground the club path travels in to out and when it moves away from the ground it travels out to in. I know you’re more than likely scratching your head over this one – watch the video and read the article and it’ll make a ton more sense. This has been a game changer for me and I so wish I had knowledge of this information thirty years ago.
- Modern golf technology can do wonders for your game. From the latest drivers to launch monitors to pressure plates – there is new technology that can help you make real changes to almost any part of your game. Seek it out and take advantage…
- It is possible for every golfer to get longer – yes, I said every golfer. Even you! Most of the gains can be made simply by learning how to deliver the driver to the ball more efficiently. If you could learn what it takes to hit the ball 15 yards further (which is about my average for male golfers after a TrackMan session!) you have now made the golf course you play 200 yards shorter. Where do I sign up for that….?
- The weight transfer in the backswing is due to the swinging motion of the arms. There should be no conscious shift or lateral motion with the body. See the 84 degree secret…
Thanks for reading – I hope you have all learned at least something from my musings during 2011. If you remember one thing remember this: Nothing will ever take the place of hard work and heart – not talent, not finances, and certainly not coaching.
Oh, and if you haven’t wrapped up your holiday shopping yet I have a smokin’ deal for you. Buy one copy of It’s All About Impact and I’ll send you four – one for each member of your foursome.
I have big plans for upgrading the information and look of the site in 2012 so stick around and watch this space…
Let’s start at address: In order to move your swing plane to facilitate an in-to-out path drop your back foot and shoulder inside the target line - basically set up with a slightly closed stance.
Tee the ball high and make sure it is not too far back in your stance. You should have a sense that you are behind the ball and are preparing to “swing uphill” as you get set.
In the swing you will need to feel that you are staying behind the ball with your upper body as you aggressively drive the hips and weight over onto the front foot. This is where the “uphill” sense comes from – as the hips drive the head stays back you create the body motion that allows for the clubhead to move up into the hit. I like to refer to this as body curve.
Believe it or not when you hit 5 degrees from the inside, coupled with 5 degrees up on the ball the clubhead is travelling straight at the target at impact (assuming you aligned correctly of course)! A fantastic recipe for long and efficient tee shots.
If you cannot seem to get the sense or feel for hitting up on the ball it could well be that your are working your body incorrectly through impact. It is very common for golfers with tight hips or general flexibility problems to overuse the upper body and try to muscle the hit with their arms. This will always result in a downward, spinny strike on the ball. You may also need to consult with a golf specific fitness trainer to help you become more physically able to get your body into the correct position.
There are important differences that occur at impact when a golfer hits either down or up on the ball (attack angle). I have always espoused that golfers hit down on all clubs, the driver included, but my research with Trackman has convinced me otherwise. The ball should be struck with a subtle downward blow with all shots off the ground (irons, hybrids and fairways), but the driver should ideally be hit with an upward strike for optimal trajectory and spin patterns. I will attempt to explain the differences in the direction the clubhead travels (relative to the target line) as it moves both down, and up, into the ball.
Firstly, it is important to understand the difference between swing plane (also referred to as swing direction) and club path, because too many golfers believe they are one and the same. Let’s view swing plane as the hula hoop in the pictures below - it is the angle upon which the arc of the swing travels. Club path is the direction the clubhead is travelling in, relative to the target line, at the moment of impact.
Hitting down on the Ball:
PGA Tour golfers hit down on a 7 iron with an average attack angle of slightly more than 4 degrees. You should be able to tell to what degree you hit down on the ball simply by analyzing your divots - too much dirt being moved and you’re more than likely 8 degrees down, no divots would mean a flat or neutral attack angle.
When a golfer hits down on the ball with a neutral swing plane (straight at the target) notice how the pencil (used to illustrate club path) points right of the target. The table’s edge indicates the target line.
This means that with a straight plane/swing direction, when the clubhead travels down, it is also travelling from in to out relative to the target line.
In order to neutralize the club path, the swing plane must actually be rotated to the left. Thus, with a descending attack angle, in order to create a straight club path, the swing plane must be rotated to the left of the target line (for right handers).
Hitting up on the Ball:
Better drivers of the ball tend to hit up on the ball – anywhere from 1-5 degrees up. This reduces the amount of spin on the ball and increases the launch angle – thus increasing both carry and roll distance.
When a golfer hits up on the ball with a neutral swing plane (straight at the target) notice how the pencil (club path) points left of the target.
In this example, with a straight plane/swing direction, when the clubhead travels upward, it is also travelling from out to in relative to the target line.
This out to in path can be neutralized by rotating the swing plane/direction to the right (for right handers). Notice how the pencil (club path) is now straight.
So if somebody ever asks you if the swing with the driver and the irons is the same, just smile and say, “No, not really!”
Any thoughts? Questions….