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Shaft Twisting Causes Hooks and Slice

shaft_twisting_256Swing variations and their resulting shaft twisting are subjects that are rarely addressed by the golf press. Therefore, the importance of these topics is not widely understood by golfers in general.

Up until now, most golfers have attributed hooks and slices to defects in their swing, grip, hip rotation and even the small sweet spot in club head. We do recognize the importance of a perfected swing. However, based on our experience in fitting golfers with the aid of instruments. A technically perfect swing is something that rarely happens.

The great majority of swings that we have observed were golf swings with an inherent 5-degree variation in either swing path or club head position. In layman's terms, this means that the club head is either 5 degrees open orclosed on impact, or the swing path is either 5 degrees inside out or outside in, or the combination of both.

The constant in a golf swing is variation itself. However, it is rather ironic that most golf companies publish performance statistics based upon center-hit data. When in fact a perfect center-hit is a phenomenon that rarely occurs.

Understanding the role of variations in a golf swing, we can now address the issue of its impact on shaft twisting. The physics behind shaft twisting is what engineers have called the "Circular Moment of Inertia". To put it simply, the bigger the club head, the more the shaft twists. From the perspective of the ball impact point, the further away from dead center the ball impacts, the more the shaft twists.

Ironically, the common solution to the issue of swing variations is a bigger club head with a larger sweet spot, while using shafts that twist excessively. This is most unfortunate, because the amount of shaft twisting will be further exaggerated with a bigger head. 280 cc driver heads dominated the market in 2000. Larger 360cc driver heads have become the industry standard for 2002. Based on player testing, we have estimated that a switch from a 280 cc driver to a 360 cc driver frequently generate the equivalent of one degree increase in torque particularly on off-center hits.

We have frequently asked golfers this question, " what is the percentage of time your drives are straight?" The answer is a historically low average of 15%. Based upon our survey, we cannot help but asking ourselves how this trend can be in the best interest of golfers.

Let there be no doubt that the shaft is the engine of a golf club. To make a club more forgiving, golfers need shafts that twist less, so that the 5 degree variations inherent in most golfersÕ swings will not be magnified to the extend of an out of bounds shot.

We take pride in producing the finest quality of shafts anywhere. It may cost you a little bit more, but we make shafts that twist less, providing increased accuracy and distance. At Harrison, we make shafts that make a difference.