This key design feature is shared in both SIM and SIM Max. What was the fix?Īlthough seemingly simple, the answer was rotating the Inertia Generator the match the direction of airflow at this pivotal moment. In aerodynamic testing during the prototype phase, our team discovered that for all the positives of the Inertia Generator, it actually hindered airflow across the bottom of the club during the most critical phase of the downswing – the three feet prior to impact, also known as the speed generation zone. Engineers counteracted that effect by placing the heavy Inertia Generator at the rear of the club – bringing CG projection down to center face while simultaneously increasing MOI (forgiveness). They work in unison to form the new shape (hence the name: Shape In Motion) that makes SIM a feat of geometric engineering.Īs discussed in our previous post, the raised crown and sole promote an aerodynamic clubhead shape but high CG projection – resulting in less than ideal launch conditions. The most critical feature of both drivers is the Inertia Generator and the asymmetric sole design. However, there are discernible differences that make each driver more playable for certain golfers. The new SIM and SIM Max drivers have a lot of similarities, as you would expect.
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