Golf Club Head Sliding Weights for Low CG and High MOI
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Solution Overview
Problem
Conventional golf club heads face a trade-off between high moments of inertia for forgiveness and low center-of-gravity, with traditional fairway woods suffering from low mass moments of inertia and poor forgiveness, and drivers having high CG, leading to inconsistent performance across different playing conditions.
Innovation Solution
A golf club head design featuring a sliding weight track with adjustable weight members, composite inserts, and a coefficient of restitution (COR) feature, allowing for adjustable CG and MOI to enhance forgiveness and performance across various impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the center of gravity is positioned lower in the golf club head, then launch angle and flight trajectory are improved, but the moment of inertia decreases reducing forgiveness
Solution Approach 1:
The weight system is divided into multiple adjustable weight members that can be independently positioned within separate weight tracks, allowing the designer to segment the mass distribution to simultaneously achieve low CG and high MOI by placing weights in specific locations along the tracks
Solution Approach 2:
The weight members are made adjustable and movable within the weight tracks, allowing the center of gravity and moment of inertia to be dynamically repositioned based on playing conditions, enabling the club to adapt between low CG for launch and high MOI for forgiveness
2Stability of the object's composition
If the club head height is increased to achieve higher moment of inertia, then forgiveness is improved, but the center of gravity position rises affecting launch angle
Solution Approach 1:
The weight tracks are positioned in the sole region of the club head, utilizing the horizontal dimension along the sole rather than vertical positioning, which allows the CG to be positioned low vertically while maintaining high MOI through lateral weight distribution in the weight tracks
3Speed
If the golf club head is designed for tee shots with higher CG, then ball speed is improved, but performance on turf shots deteriorates
Solution Approach 1:
The adjustable weight members allow the golfer to reposition the center of gravity between forward positions for tee shots (optimizing ball speed) and backward positions for turf shots (optimizing launch and forgiveness), enabling the same club to adapt to different playing conditions
Solution Approach 2:
The weight members can be repositioned along the weight tracks to change the center of gravity location, allowing parameter adjustment between forward CG for maximum ball speed on tee shots and rearward CG for optimal turf shot performance
Data Source
AI summary
Disclosed herein is a golf club head comprising at least one crown opening and at least one crown insert attached to the body and covering the at least one crown opening. The golf club head further comprises at least one sole opening and at least one sole insert attached to the body and covering the at least one sole opening. The golf club head additionally includes at least one weight member configured to clamp first and second ledges at selected locations along a sliding weight track. The golf club head also comprise a coefficient of restitution (COR) feature located on the sole of the golf club head. The at least one crown insert is formed from a composite material having a density between 1 g/cc and 2 g/cc. The at least one sole insert is formed from a composite material having a density between 1 g/cc and 2 g/cc.