Golf ball with improved flight performance
AssigneeAcushnet Company
InventorsLaurent C. Bissonnette, Jeffrey L. Dalton, Steven Aoyama
Life of this patent
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Abstract
A golf ball with aerodynamic coefficient magnitude and aerodynamic force angle, resulting in improved flight performance, such as increased carry and flight consistency regardless of ball orientation. In particular, the present invention is directed to a golf ball having increased flight distance as defined by a set of aerodynamic requirements, at particular spin ratios and Reynolds Numbers. The invention is also directed toward golf balls with dimple diameters of greater than 6.5 percent of the ball diameter and dimples with a profile defined by a catenary curve.
Claims47
A golf ball with a plurality of dimples having an aerodynamic coefficient magnitude defined by Cmag=(CL2+CD2) and an aerodynamic force angle defined by Angle=tan−1(CL/CD), wherein CL is a lift coefficient and CD is a drag coefficient, wherein the golf ball comprises:
- a first aerodynamic coefficient magnitude from about 0.24 to about 0.27 and a first aerodynamic force angle of about 31 degrees to about 35 degrees at a Reynolds Number of about 230000 and a spin ratio of about 0.085;
- and
- a second aerodynamic coefficient magnitude from about 0.25 to about 0.28 and a second aerodynamic force angle of about 34 degrees to about 38 degrees at a Reynolds Number of about 207000 and a spin ratio of about 0.095.
A golf ball with a plurality of dimples having an aerodynamic coefficient magnitude defined by Cmag=(CL2+CD2) and an aerodynamic force angle defined by Angle=tan−1(CL/CD), wherein CL is a lift coefficient and CD is a drag coefficient, wherein the golf ball comprises:
- a first aerodynamic coefficient magnitude from about 0.40 to about 0.45 and a first aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 69000 and a spin ratio of about 0.284;
- and
- a second aerodynamic coefficient magnitude from about 0.36 to about 0.40 and a second aerodynamic force angle of about 41 degrees to about 45 degrees at a Reynolds Number of about 92000 and a spin ratio of about 0.213.
A golf ball with a plurality of dimples having an aerodynamic coefficient magnitude defined by Cmag=(CL2+CD2) and an aerodynamic force angle defined by Angle=tan−1(CL/CD), wherein CL is a lift coefficient and CD is a drag coefficient, wherein the golf ball comprises:
- a first aerodynamic coefficient magnitude from about 0.40 to about 0.45 and a first aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 69000 and a spin ratio of about 0.284 for a ball weight W of 1.62 ounces and a diameter D of 1.68 inches;
- and
- a second aerodynamic coefficient magnitude from about 0.36 to about 0.40 and a second aerodynamic force angle of about 41 degrees to about 45 degrees at a Reynolds Number of about 92000 and a spin ratio of about 0.213 for a ball weight of 1.62 ounces and a diameter of 1.68 inches,
- wherein the aerodynamic coefficient magnitudes and force angles are adjusted for ball weight and diameter in the following manner:
- Adjusted Cmag=Cmag(sin(Angle)*(W/1.62)*(1.68/D)2)2+(cos(Angle))2)
- Adjusted Angle=tan−1(tan(Angle)*(W/1.62)*(1.68/D)2).
A golf ball with a plurality of dimples having an aerodynamic coefficient magnitude defined by Cmag=(CL2+CD2) and an aerodynamic force angle defined by Angle=tan−1(CL/CD), wherein CL is a lift coefficient and CD is a drag coefficient, wherein the golf ball comprises:
- a first aerodynamic coefficient magnitude from about 0.40 to about 0.44 and a first aerodynamic force angle of about 40 degrees to about 42 degrees at a Reynolds Number of about 69000 and a spin ratio of about 0.284;
- and
- a second aerodynamic coefficient magnitude from about 0.36 to about 0.39 and a second aerodynamic force angle of about 41 degrees to about 43 degrees at a Reynolds Number of about 92000 and a spin ratio of about 0.213.
Dependencies are inferred from the claim text.