The Relationship Between MOI And Drivers

With the develpoment of golf clubs, especially golf drivers, MOI is being pursued by every brand golf manufacturers. It has been a important standard to judge a club. What is MOI? What is the effect?
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* Callaway Diablo Edge Irons
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* Callaway Golf Clubs

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July 25, 2011 - PRLog -- Callaway Golf Clubs use Fusion Technology, perfectly blending the titanium face, carbon composite body and tiny bismuth alloy weights together. This technology creates higher MOI than that of the traditional pure titanium driver.
From January 1st, 2008, R & A has used the same rule with the USGA standard on golf equipment restriction. One of the biggest differences is the maximum COR of clubs face was changed in accordance with USGA’s standard. COR has a uniform standard, and the head size is also the same. So every brand golf manufacturer began to develop towards any other directions. As a matter of fact, from 2006, golf clubs manufacturers began to pay attention to MOI of drivers’. This trends has been extended to the development of golf irons, golf fairway woods and even putters. Respective golf clubs manufacturers continue to introduce new changes on the aspects of how to upgrade MOI and how to attract customers. What’s the MOI? Why drivers with high MOI will be stable than common drivers?
What is the MOI
MOI is the abbreviation Moment Of Inertia. Factors affecting MOI are the weight of the quality element and the vertical distance. On the head, the factors refer to the weight the head back and the distance between these weight to the face. The heavier the weight is and the greater the distance is, the MOI will be higher. If you still feel a little confused,  you can see the description of various drivers, it says ‘We put more weight on the back of  the head, to make the center of gravity lower and deeper.’
The effects of MOI is the torsion capacity of head when touching the ball. At the moment, the ball gives the clubs face a counterforce, which generates the head rotate with the center of gravity. If the COG is farther from the force point, the MOI of rotation produced by counterforce will be smaller. So the club face is unlikely to reverse, resulting in the stable distance and direction. In fact, golf clubs manufacturers take pains to produce lower center of gravity, to upgrade this MOI. What is the benefit of high MOI drivers? The answer is to improve average driving distance. MOI can not help you increase your driving distance, but it can reduce the distance loss when you make misshots.

New Trend to Enhanced MOI
Golf equipment manufacturers have tried to put the center of gravity backward through a variety of different sizes, materials and design. However there is limit on golf clubs head size. Unless you are able to make a head as flat as a pancake, or the center of gravity is really hard to move backword. When most of the materials have been used, the trend has already begun to focus on the shape of clubs head.

Side Effects Of MOI
If you continue to pull back the head back and constantly change the shape, the umbriferous area is bound to increase, which may effect the players’ visual impact. Some golfers puff at such a large sizing head. Some players think that large size head bring them confidence when aiming the ball. Anyhow, this trend has been inevitable. Even if you are a supporters of small head drivers, I am sorry you have to find a five-year-ago driver from a warehouse. Callaway Diablo Edge driver and Callaway Diablo Edge Irons(available at are kinds of clubs with high MOI.
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