I sure miss the sound of persimmon. I was reading an article you have online that said when we use titanium we lose the gear effect that persimmon offered. Is that true?
Also, will the oversize wood heads provide any advantage? I am not a big hitter (230ish) so I would guess that the COR and other benefits of the new titanium drivers offer distance advantages. I play a titanium 450 cc driver and only 43.5″ shaft for control. Thanks for your book, Just Hit It.
I am pleased you enjoyed my first book “Just Hit It”. It was fun to write and allowed me to express some of my philosophical beliefs about our wonderful game. Our latest book is “The Fundamentals of Putting,” an instructional book which will walk you through the fundamental mechanics – based on scientific principles — allowing you to know why you are putting well — if you are — or to help you do so if you are not.
Reference persimmon vs. big titanium drivers; I too miss the sound of persimmon but I can tell you that the gear-effect is alive and well with the big titanium heads.
These large heads have a higher MOI (Moment of Inertia) than the smaller woodenheads and thus do not twist as much on off-centered impacts. It is this twisting of the drivers and even fairway woods, on off-centered impacts, that cause the gear-effect. It still happens, but not as severely with the big titanium heads
To explain the gear effect, imagine two meshed gearwheels (cogs) – a small one representing the ball, and a big one representing the driver head. If the centers of these two cogs are on the same line as the head path, then you will have sweet spot impact and there is no twisting of the head (big cog) during impact. If the small cog (the ball) is NOT on this line – e.g. a toed shot – then the big cog (the driver head) will twist in a clockwise direction making the small cog twist in a counterclockwise direction. This is the gear effect. In the case of an impact on the toe of a driver, the ball will have sidespin and the flight will be a slight draw. Similarly, an impact on the heel will result in a slight fade 🙂 – not a duck hook or a banana slice 😦
The same phenomenon works on impacts up or down the face taking away some backspin on high impact points, and adding backspin on low impact points. The difference in total backspin could be as much as 800 rpm or more depending on how high or low impact is on the face.
Let me assure you that as handsome as some persimmon heads are they deserve a place on your mantelshelf rather than in your bag.
The high MOI of the titanium driver heads and the higher COR (Coefficient of Restitution) will really help you. Because you are using a 43.5 inch driver you will improve your accuracy and in most cases, you will hit the ball farther taking advantage of sweet spot impacts. Some of the longer drivers — up to 47+ inches – should be sold with snakebite kits.
Please let us know how the new technology in titanium drivers has helped your game. Make a comment by replying below.