Method for designing a golf club
First Claim
1. A method of determining club parameters for at least one golf club, belonging to a set of golf clubs for a specific golfer, having arbitrary club length Lk,n, each golf club having a shaft with an upper end and a lower end, a grip section on the upper end of the shaft, a head with a ball-striking surface mounted on the lower end of the shaft, a balance point BP wherein a balance point length LBP,n is defined from the distal end of the grip section to the balance point BP, a club weight mk,n, and a club head weight mkh,n with a centre of gravity CG arranged in a CG plane perpendicular to a first direction along the centre of the shaft, the club length Lk,n is defined as a first distance from the distal end of the grip section to the CG plane along the first direction, the method comprising:
- A) selecting club length Lref,I of a first reference golf club,B) varying at least one club parameter belonging to the group consisting of;
club weight, club head weight, CG length and balance point length of the first reference golf club to identify an interval for each varied club parameter of the first reference golf club for the golfer,B1) the golfer hits a ball repeatedly,C) selecting a club parameter within each identified interval, whereby the golfer is able to repeatedly hit a ball with a limited spread in at least one parameter belonging to the group consisting of;
launch angle, spin, carry distance, swing tempo, spread angle, ball impact position on ball striking surface, ball speed at impact, and club speed at impact,D) selecting club length Lref,II of a second reference golf club being different than the club length Lref,I of the first reference golf club,E) repeating B, B1 and C for the second reference golf club, andF) calculating at least one torsional moment (PCF, ICF, HCF, GCF) based on the selected at least one club parameter for the first reference golf club and the second reference golf club,G) determining a relationship of each torsional moment (PCF, ICF, HCF, GCF) as a function of club length based on each corresponding calculated torsional moment in F, andH) selecting club length Lk,1 for a first golf club belonging to the set of golf clubs and determining club parameters for the first golf club based on each determined relationship in G.
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Abstract
The present invention relates to a method for determining club parameters for at least one golf club, belonging to a set of golf clubs for a specific golfer, having arbitrary club length Lk,n. The method comprises: selecting club length of a first reference golf club and a second reference club; varying at least one club parameter belong to the group: club weight, club head weight, CG position and weight distribution of the first reference golf club and the second reference golf club; selecting a club parameter value for each selected club parameter. At least one torsional moment PCF, ICF, HCF, GCF is calculated and a relationship is determined as a function of club length. A club length for a first golf club belonging to the set of golf clubs is selected and club parameters for the first golf club is determined based on each determined relationship.
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Citations
15 Claims
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1. A method of determining club parameters for at least one golf club, belonging to a set of golf clubs for a specific golfer, having arbitrary club length Lk,n, each golf club having a shaft with an upper end and a lower end, a grip section on the upper end of the shaft, a head with a ball-striking surface mounted on the lower end of the shaft, a balance point BP wherein a balance point length LBP,n is defined from the distal end of the grip section to the balance point BP, a club weight mk,n, and a club head weight mkh,n with a centre of gravity CG arranged in a CG plane perpendicular to a first direction along the centre of the shaft, the club length Lk,n is defined as a first distance from the distal end of the grip section to the CG plane along the first direction, the method comprising:
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A) selecting club length Lref,I of a first reference golf club, B) varying at least one club parameter belonging to the group consisting of;
club weight, club head weight, CG length and balance point length of the first reference golf club to identify an interval for each varied club parameter of the first reference golf club for the golfer,B1) the golfer hits a ball repeatedly, C) selecting a club parameter within each identified interval, whereby the golfer is able to repeatedly hit a ball with a limited spread in at least one parameter belonging to the group consisting of;
launch angle, spin, carry distance, swing tempo, spread angle, ball impact position on ball striking surface, ball speed at impact, and club speed at impact,D) selecting club length Lref,II of a second reference golf club being different than the club length Lref,I of the first reference golf club, E) repeating B, B1 and C for the second reference golf club, and F) calculating at least one torsional moment (PCF, ICF, HCF, GCF) based on the selected at least one club parameter for the first reference golf club and the second reference golf club, G) determining a relationship of each torsional moment (PCF, ICF, HCF, GCF) as a function of club length based on each corresponding calculated torsional moment in F, and H) selecting club length Lk,1 for a first golf club belonging to the set of golf clubs and determining club parameters for the first golf club based on each determined relationship in G. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification