Скачать или смотреть Golf driver testing: What made Rory's and Scottie's drivers non-conforming at the PGA?

In golf, there is a 100-page manual that outlines the rules around what makes golf clubs and equipment conforming (or legal) in the eyes of the USGA and the R&A. There are a lot of specific rules about drivers, including how much energy can be transferred in a swing to the golf ball -- measured by something known as the coefficient of restitution and tested by something called characteristic time. I explain what those terms mean in this video, as well as how a driver can become illegal over time by thinning out the face and making it more flexible. Also, you'll be stunned to know just how little time the golf club makes impact with the ball!

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