Collision!
Few golfers are aware of what really happens when a clubhead collides with a golf ball at high speed, not to mention how much an off-center collision can effect the flight of the ball. My hope is that this article and the accompanying video footage will give each of you a much better understanding of the importance of solid contact.
I would encourage you to watch the following PGATour.com video a few times…
As you can see a strike away from the center of gravity of the clubhead will lead to twisting of the clubhead. While most of the twisting occurs after impact, a portion of it does occur during the impact interval. It is this twisting during impact that leads to gear effect which can greatly alter the flight of a shot.
An off-center collision will twist the clubface in any direction.
A hit high on the face will tilt the face upward and reduce the amount of spin on the ball, while a low strike point will deloft the face and increase spin rate. A strike towards the toe will open the clubface and increase draw or reduce fade and a strike towards the heel will close the face and increase fade or reduce draw. Interestingly, the clubface will tilt vertically (top/bottom) almost as much as it will horizontally (toe/heel).
There are seven shots in the video and if each of them had a neutral club face and club path during impact, the results of each shot due to gear effect would have been as follows:
Shot 1 – A strike above the “equator” of the clubface and slightly towards the toe. Ideal if you would like to hit high launching, low spinning, draws that go a long way.
Shot 2 – A more pronounced high, toe side strike. This strike point is too far from aligning with the center of gravity of the clubhead to be beneficial. This flight due to gear effect would have been fairly high launching, low spinning and would not have faded as much as it might have appeared.
Shot 3 – Another extreme high, toe side strike along with a heavy descending blow – not good. High and right, but a fairly straight flight.
Shot 4 – A severely off-center hit where the collision is with a very low portion of the face and in the heel. Believe it or not this ball gets airborne and will almost always be an unimpressive high spinning, low fade with very little distance.
Shot 5 – Charley Hoffman: I have seen numerous clips of high speed driver footage like this and I don’t think I have ever seen one where I cannot detect any twisting at all. A slight downward attack angle. Appears to be very close to a perfect center of gravity strike – a truly rare event! Very straight.
Shot 6 – Matt Kuchar: A neutral attack angle along with a high, toe side strike. High launch, lower spin and a slight draw – boom!
Shot 7 – Luke Donald: About as solid as Charley Hoffman’s shot, but the interesting thing about this clip is the attack angle – quite severely down. Solid and straight, but not optimal for maximum distance.
It is interesting to note that today’s larger clubheads will resist twisting due to having a higher moment of inertia. MOI is a measure of a body’s resistance to angular acceleration or twisting. MOI really comes into play when the ball and the clubface meet someplace other than the sweet spot. The MOI of a club is higher for heel/toe mishits than it is for high/low mishits and therefore tends to be more forgiving on heel/toe mishits. However, golfers tend to mishit a shot further towards the heel/toe than they do high/low so the clubheads’ resistance to twisting tends to even out.
Please know that physics is not selective and any golfer, pro or amateur, can hit any shot solidly or severely off-center. Also – no golfer can “stabilize” the clubface during or after impact due to an off-center strike.
This article shows you which part of the clubface is best.
I love this video footage and from here on out it will be required viewing for all my long term and golf school students. Would love to hear your thoughts….
Ball Flight – What You Need to Know
There is so much complex information out there regarding the Ball Flight Laws – a ten second Google search yields enough confusion to get my head spinning for a month. The “old” or “new” ball flight laws, Dr. Wiren, TrackMan…..who or what should you believe?
In light of Dr. Einstein‘s insightful quote I am going to give this touchy topic my best shot and try to keep it as simple as possible. Please don’t check out! This is important information for any golfer to comprehend, so bear with me and you’ll gain a far better understanding of why your golf ball reacts the way it does.
There are only four factors that influence ball flight when clean (not necessarily solid) contact is made between a golfball and a clubface.
They are:
Club Speed
The faster the clubhead travels the further and higher the ball will travel – generally with more spin. Compare a chip (slow speed) with a pitching wedge vs. a full swing (faster speed) with a pitching wedge…simple enough.
Clubface Orientation
Orientation is a fancy term that refers to where the clubface is angled. Keep in mind that the face angles both left or right or up or down – left or right being an open or closed face and the up/down variable (although hopefully never down) referring to the loft imparted at impact (dynamic loft). The face angle largely determines where the ball launches – left or right of the target and at what angle relative to the ground. A good general point to remember is clubface (for the most part) = launch.
Clubhead Direction
Once again the direction the clubhead travels relative to the target line at impact – left or right (clubpath) and up or down (attack angle) – plays a role in determining ball flight. A lesser role than the clubface, but a role nonetheless. A good general point to remember is clubpath (for the most part) = curve.
Centerdness of Contact
This is a big one and something the vast majority of teachers and golfers tend to underestimate. Most golfers strike the ball on the sweet spot far less frequently than they think . I often see golfers that swing for a draw, yet strike for a fade – in other words they have a clubpath that is in to out, yet hit the ball slightly out the heel which leads to a fade. An off center point of contact on the face leads to gear effect, which overrides or reduces the effect the face orientation and clubhead direction have on ball flight. This factor plays a bigger role than most realize – watch out for it. And the best way to do that – a spray of Dr. Scholl’s foot powder.
Read an earlier article on centerdness of contact and a great article on the TrackMan blog illustrating the importance of center contact.
Here are a few simple factors to understand and remember:
- The ball launches primarily in the direction of the face – varying degrees of up and either left or right.
- Given a centered hit, clubpath leads to curve. With the curve being away from the clubpath.
- Hitting down does not increase spin, and conversely, hitting up does not necessarily reduce spin.
- Heel hits encourage fades or reduce hooks and toe hits encourage draws or reduce slices.
- The more you hit down on the ball, the more you will swing in to out and the more you hit up on the ball the more you will swing out to in.
Now that you’re finished reading shoot back up to the top and read again. This is vital information to assist with your understanding of of how your golf club “communicates” to your golf ball.
If you’d like to try out your new understanding of the Ball Flight Laws in southwest Florida check out this Fort Myers Golf Guide for a great course to play.
Thanks for reading and feel free to fire away with any questions you may have…..
The Hot Drivers and Shafts for 2013
It’s always nice to get an unbiased opinion from an expert. As a result I recently spent some time with friend and clubfitting guru Ian Fraser from Modern Golf in Toronto Canada, discussing what he deemed to be the top driver and shaft options available for 2013. Ian has no affiliation with any one club or shaft manufacturer so I really value his opinions. Here are his selections for the top shafts available this year:
- higher launch and low spin
- stronger mid-section helps to increase ball speed
- BB – blue bullet
- designed to produce less spin with a lower launch
- designed with feedback from ENSO technology
- lower launching and lower spinning shaft
- excellent price point
I also wanted to hear Ian’s take on the new crop of drivers that have been on the market for a few months now and he had some interesting things to say. Here are his choices:
- improved design and ball speed over the 910 series
- D2 and D3 different in size, yet similar in spin rates
- massive adjustability with very high ball speed
- slightly heavier than the R11S
- highest MOI of any driver available and best paint job!
- slightly less spin and higher ball speed than the G20
I suppose my optimal driver would one that had the looks of the Titleist 913 D3, the stability and matte black finish of the Ping G25 along with the adjustability and ball speed of the TaylorMade R1….one can dream!
Please be aware that going out and simply purchasing and combining one of the above options might not be the best thing for you. I would recommend getting with a professional clubfitter who uses TrackMan technology to find the appropriate head and shaft match for your particular swing. You should be looking for the optimal launch and spin characteristics that match your swing speed.
Read THIS to know where you should be launching and spinning the ball based on your current club speed.
Adam Scott’s Driver and Notes
Last weekend we saw a tremendous back nine battle at Augusta National between Adam Scott and Angel Cabrera. There was so much to note, that little was made of the fact that Adam had a brand new driver in his bag – the Titleist 913 D3 (9.5 degree) with a Graphite Design Tour AD DI-8 shaft.
Adam has used this shaft for a few years now and only upgraded the clubhead to the latest Titleist model. His shaft is the only one of its kind – built especially for him. The shaft is built in the same manner and includes the same technology as all other Tour AD DI 8 X flex shafts, but he requested the color pattern and they agreed to build it, but just for him. Legend has it that even Tiger Woods, who uses the Tour AD DI 6 ( a lighter version), asked for the same color pattern and was turned down!
Adam’s driver shaft weighs in at a trimmed weight of just over 80 grams and measures out to a playing length of 44 3/4″. Here is Ian Fraser from Modern Golf sharing a few interesting notes on the club:
I also wanted to mention that I am honored to announce that I have been named a TrackMan University Partner.
From TrackMan:
TrackMan University Partners are highly respected members of the golf community and they share our enthusiasm for the TrackMan technology and data parameters. TrackMan University Partners will be invited as guest speakers at Users Conferences, Certification Workshops and / or other TrackMan events.
I am very excited and look forward to sharing my knowledge with you for many years to come.
I also wanted to let you know that my last day of teaching at Berkeley Hall before departing to Atlantic GC for the summer will be Saturday May 11th. I will start teaching at Atlantic on Saturday May 18th.
As always thanks for reading!
2013 Masters – Anybody Excited Yet?
Every golfer you know has thought about the Masters and Augusta National this week – more than once! What a great week to be a golfer. The excitement and thrill of 2013′s first major is here and I cannot wait for Thursday.
Masters talk invariably circles around to who you like this week. Who is your man? If I had to pick three golfers, one a favorite, another as a contender and another as an underdog – I would go with Rory McIlroy, Justin Rose and KJ Choi. I love the way Rory and KJ competed last week and I believe that with their history here this could be their week.
Here is the television guide for the week from geoffshackelford.com
Here is a list of all the Masters gear you cannot live without from Devil Ball Golf
Here is an article detailing Augusta National’s new hospitality venue Berckmans Place where apparently Condoleeza Rice, as a new member, was greeting patrons on Monday.
Here are the complete odds for every player in the field from golfodds.com. How about Rory vs. Tiger? Will Phil finish in the top 10? Will Tim Clark beat Freddie Couples?
If there was one player that I wish was competing this week it would be Seve Ballesteros. My favorite golfer growing up, I remember crying when he three putted the 10th green in a playoff with Mize and Norman and had to make the lonely haul up the hill to the clubhouse while the other two golfers continued on.
That’s really what the Masters is all about – the memories! Who can forget Bubba’s escape from the Magnolia’s, Phil’s jump on 18, Jack chasing the ball in on 17 – even the honorary starters on Thursday morning. What will remember from the 2013 edition? Whatever it is I know it’s going to be very, very good. Enjoy.
















