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"The more I practice, the luckier I get"


BEN HOGAN
 
 

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31.03
Ny måte å måle "springbretteffekten på

Det har vært mye snakk om ulovlige køller og "springbretteffekten". Nå er det kommet et forslag til en enklere metode for å måle køllene:



Den nye COR-måleren

Her er forslaget på originalspråket:

New C.O.R. test proposed
Spring-like effect of driving clubs of 15 degrees or less would be updated utilizing a new method and a portable tester in 2004, according to a joint proposal by the U.S. Golf Association and Royal and Ancient Golf Club of St. Andrews. As stated last August, the two organizations had committed to finding a new and simpler test method as quickly as possible. The status of driving clubs previously ruled conforming wouldn't be changed using the new test. If adopted, the new test method would become effective Jan. 1, 2004. Comments from manufacturers are welcomed by the USGA until April 25. Golf's two rule-making bodies are proposing to test for spring-like effect in driving clubs with a patent-pending Pendulum Tester that will be easier to administer than the current method that can only be performed at the USGA's Research and Test Center. The new testing method--designed by USGA engineer Matt Pringle--would not require a club to be disassembled as the current test does, and would take only several minutes. "The test has some advantages over the method being used, primarily that it is non-intrusive," said David Fay, the USGA's executive director. "We don't have to take a club apart to test it. It's also portable, faster and more accurate." The new test will require only a low-speed strike to the clubface by a small weight on a pendulum. The device will measure the contact time of the collision — or characteristic time, as the term will be called--between the two objects. The spring-like effect will be based on a club's characteristic time. The limit in characteristic time very closely correlates to the current spring-like effect of .83 in the coefficient of restitution measurement.



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