GOLF BALL
Golf balls disclosed herein have a combination of aerodynamic properties and construction parameters providing a desired set of performance characteristics.
1 . A golf ball comprising at least a core and a cover,
the cover comprising a plurality of dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that:
C D1 ≤0.230 at a Reynolds number of 220,000 and a spin ratio of 0.070,
C D2 ≤0.230 at a Reynolds number of 160,000 and a spin ratio of 0.095, and
C D3 ≤0.230 at a Reynolds number of 120,000 and a spin ratio of 0.100;
the dimple pattern having an integrated drag area (DA) defined by:
DA
=
∫
160
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
000
225
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
000
C
D
(
Re
)
dRe
where C D (Re) is established at a launch condition of a golf ball speed of 182.0 mph, a launch angle of 10.0 degrees, and a spin rate of 2,700 rpm, such that DA≤14,000;
the golf ball having a weight of 1.600 ounces-1.620 ounces and a diameter of 1.680 inches-1.700 inches, the core having a weight (W core ) of at least 1.245 ounces and a diameter (D core ) of at least 1.525 inches; and
wherein:
(i) the golf ball has a compression that is less than 60, and the golf ball coefficient of restitution (COR ball ) is less than 0.785;
(ii) the golf ball has a compression of at least 60 and less than 80, and the golf ball coefficient of restitution (COR ball ) is less than 0.775;
(iii) the golf ball has a compression of at least 80 and less than 100, and the golf ball coefficient of restitution (COR ball ) is less than 0.755; or
(iv) the golf ball has a compression that is at least 100, and the golf ball coefficient of restitution (COR ball ) is less than 0.725.
2 . The golf ball according to claim 1 , wherein:
C D1 ≤0.225 at a Reynolds number of 220,000 and a spin ratio of 0.070,
C D2 ≤0.225 at a Reynolds number of 160,000 and a spin ratio of 0.095, and
C D3 ≤0.225 at a Reynolds number of 120,000 and a spin ratio of 0.100.
3 . The golf ball according to claim 1 , wherein the golf ball has a Speed Factor(S) defined by the following equation:
S
=
90
2
.
6
7
+
8
1
4
.
6
3
(
COR
ball
)
-
5.44
IV
ball
where (COR ball ) is the golf ball coefficient of restitution, and (IV ball ) is the golf ball initial velocity (feet/second), and
wherein the Speed Factor(S) is less than 177.
4 . The golf ball according to claim 3 , wherein the Speed Factor is less than 176.
5 . The golf ball according to claim 3 , wherein the Speed Factor is less than 175.
6 . The golf ball according to claim 1 , wherein the core weight (W core ) is at least 1.260 ounces and the core diameter (D core ) is at least 1.530 inches.
7 . The golf ball according to claim 1 , wherein the core weight (W core ) is at least 1.275 ounces and the core diameter (D core ) is at least 1.545 inches.
8 . The golf ball according to claim 1 , wherein the core weight (W core ) is at least 1.300 ounces and the core diameter (D core ) is at least 1.545 inches.
9 . The golf ball according to claim 1 , wherein the golf ball has a Flight Factor (F) defined by the following equation:
F
=
DA
×
W
core
×
D
core
×
(
C
D
1
+
C
D
2
+
C
D
3
)
IV
ball
×
COR
ball
×
COR
core
,
where (IV ball ) is the golf ball initial velocity (feet/second) and (COR core ) is the core coefficient of restitution, wherein the Flight Factor (F) is at least 120.
10 . The golf ball according claim 1 , wherein the integrated drag area (DA) is defined such that: DA≤13,750.
11 . The golf ball according claim 1 , wherein the integrated drag area (DA) is defined such that: DA≤13,500.
12 . The golf ball according claim 1 , wherein the integrated drag area (DA) is defined such that: DA≤13,250.
13 . The golf ball according to claim 1 , wherein a coefficient of restitution (COR) of the core is no greater than 0.740.
14 . The golf ball according to claim 1 , wherein a coefficient of restitution (COR) of the core is no greater than 0.700.
15 . The golf ball according to claim 1 , wherein a coefficient of restitution (COR) of the core is no greater than 0.670.
16 . The golf ball according to claim 1 , wherein the golf ball compression is less than 60, and the golf ball coefficient of restitution (COR ball ) is less than 0.785.
17 . The golf ball according to claim 1 , wherein the golf ball compression is at least 60 and less than 80, and the golf ball coefficient of restitution (COR ball ) is less than 0.775.
18 . The golf ball according to claim 1 , wherein the golf ball compression is at least 80 and less than 100, and the golf ball coefficient of restitution (COR ball ) is less than 0.755.
19 . The golf ball according to claim 1 , wherein the golf ball compression is at least 100, and the golf ball coefficient of restitution (COR ball ) is less than 0.725.
20 . The golf ball according to claim 1 , wherein the drag coefficient (C D ) and the lift coefficient (C L ) at a Reynolds number of 225,000, and spin ratio of 0.070 have the following relationship: 1.350≤C D /C L <1.550.
21 . The golf ball according to claim 1 , wherein the drag coefficient (C D ) and the lift coefficient (C L ) at a Reynolds number of 225,000, and spin ratio of 0.070 have the following relationship: 1.550≤C D /C L <1.750.
22 . The golf ball according to claim 1 , wherein the drag coefficient (C D ) and the lift coefficient (C L ) at a Reynolds number of 225,000, and spin ratio of 0.070 have the following relationship: 1.750≤C D /C L ≤1.950.
23 . A golf ball comprising at least a core and a cover,
the cover comprising a plurality of dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that:
C D1 ≤0.230 at a Reynolds number of 220,000 and a spin ratio of 0.070,
C D2 ≤0.230 at a Reynolds number of 160,000 and a spin ratio of 0.095, and
C D3 ≤0.230 at a Reynolds number of 120,000 and a spin ratio of 0.100;
the dimple pattern having an integrated drag area (DA) defined by:
DA
=
∫
160
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
000
225
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
000
C
D
(
Re
)
dRe
where C D (Re) is established at a launch condition of a golf ball speed of 182.0 mph, a launch angle of 10.0 degrees, and a spin rate of 2,700 rpm, such that DA≤14,000;
the golf ball having a weight of 1.600 ounces-1.620 ounces and a diameter of 1.680 inches-1.700 inches;
the core having a weight of at least 1.245 ounces and a diameter of at least 1.525 inches;
wherein the golf ball has a compression (Co) that is greater than 40, and the golf ball has a coefficient of restitution (COR), such that:
-
9
.
7
1
×
1
0
-
6
C
0
2
+
5
.
4
6
×
1
0
-
4
C
0
+
0
.
7
6
5
>
COR
.