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The forgiveness of golf putters is traditionally achieved through weight distribution. Higher MOI (moment of inertia) putters will show less ball speed loss on impacts away from the sweet spot. A very large MOI putter, however, may not be desired by a golfer due to weight or appearance. The relationship between ball speed and impact location is aff...
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Citations
... Efforts have been made by manufacturers to exploit this to improve ball speed consistency, with varying success. Other approaches to normalize ball speed have been considered as well, including a flexible impact surface [7] and a variable milling pattern [8]. ...
... However, there are limits to ball speed normalization via progressive face properties. This generally appears to be around 20 mm horizontally from the sweet spot, depending on the MOI of the specific putter [7,8]. In addition, progressive face properties may be limited or avoided altogether based on feel preferences. ...
The forgiveness of golf putters is traditionally achieved through weight distribution. Putters are often designed with large footprints, which help to increase the moment of inertia (MOI), but consequently move the center of gravity (CG) farther behind the face. The use of higher MOI putters will result in less ball speed loss on impacts away from the sweet spot (i.e., more forgiveness). It has been shown that certain face properties, such as milling patterns, grooves, or soft inserts, can be leveraged to have a similar effect. This paper explores the relationships between impact location, MOI, CG depth, discretionary mass placement, and launch direction for these putters. A novel design strategy is proposed. Minimizing CG depth for putters with ball speed normalizing face properties, even at the expense of MOI, can result in more consistent launch direction and distance control for the average player.
