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 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;
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:
0.225≤C D1 ≤0.235 at a Reynolds number of 220,000 and a spin ratio of 0.070,
0.225≤C D2 ≤0.235 at a Reynolds number of 160,000 and a spin ratio of 0.095, and
0.225≤C D3 ≤0.235 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
=
∫
1
6
0
,
0
0
0
2
2
5
,
0
0
0
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: 13,750≤DA≤14,750, and
wherein:
(i) the golf ball has a compression that is less than 60, and a golf ball coefficient of restitution (COR ball ) is 0.785-0.815;
(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 0.770-0.815;
(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 0.740-0.810; or
(iv) the golf ball has a compression of at least 100, and the golf ball coefficient of restitution (COR ball ) is 0.710-0.780.
2 . 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 0.785-0.815.
3 . 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 0.770-0.815.
4 . 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 0.740-0.810.
5 . 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 0.710-0.780.
6 . The golf ball according to claim 1 , wherein the golf ball has a Flight Factor (F) defined by the following equation:
F
=
D
A
×
W
c
o
r
e
×
D
c
o
r
e
×
(
C
D
1
+
C
D
2
+
C
D
3
)
IV
ball
×
COR
ball
×
COR
c
o
r
e
,
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.
7 . The golf ball according to claim 6 , wherein the Flight Factor (F) is at least 130.
8 . The golf ball according to claim 6 , wherein the Flight Factor (F) is at least 140.
9 . The golf ball according to claim 6 , wherein the Flight Factor (F) is at least 150.
10 . 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:
1.375
≤
C
D
/
C
L
<
1
.
5
7
5
.
11 . 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:
1.575
≤
C
D
/
C
L
<
1
.
7
7
5
.
12 . 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:
1.775
≤
C
D
/
C
L
≤
1
.
9
7
5
.
13 . The golf ball according to claim 1 , wherein the golf ball coefficient of restitution (COR ball ) is no greater than 0.800.
14 . The golf ball according to claim 1 , wherein the golf ball coefficient of restitution (COR ball ) is no greater than 0.780.
15 . The golf ball according to claim 1 , wherein the core coefficient of restitution (COR core) is no greater than 0.770.
16 . The golf ball according to claim 1 , wherein the core coefficient of restitution (COR core) is no greater than 0.750.
17 . The golf ball according to claim 1 , wherein the golf ball is a two-layer golf ball.
18 . The golf ball according to claim 1 , wherein the golf ball is a three-layer golf ball.
19 . The golf ball according to claim 1 , wherein the golf ball is a four-layer golf ball.
20 . The golf ball according to claim 1 , wherein the core has a weight of at least 1.260 ounces and a diameter of at least 1.530 inches.
21 . The golf ball according to claim 1 , wherein the core has a weight of at least 1.300 ounces and a diameter of at least 1.545 inches.
22 . The golf ball according to claim 1 , wherein the golf ball has a Speed Factor(S) defined by the following equation:
S
=
9
0
2
.
6
7
+
8
1
4
.
6
3
(
COR
ball
)
-
5.44
IV
ball
,
where (IV ball ) is the golf ball initial velocity (feet/second), and
wherein 177≤S≤181.
23 . The golf ball according to claim 1 , wherein:
0.230≤C D1 ≤0.235 at a Reynolds number of 220,000 and a spin ratio of 0.070;
0.230≤C D2 ≤0.235 at a Reynolds number of 160,000 and a spin ratio of 0.095; and
0.230≤C D3 ≤0.235 at a Reynolds number of 120,000 and a spin ratio of 0.100.
24 . The golf ball according to claim 1 , wherein:
0.225≤C D1 ≤0.230 at a Reynolds number of 220,000 and a spin ratio of 0.070;
0.225≤C D2 ≤0.230 at a Reynolds number of 160,000 and a spin ratio of 0.095; and
0.225≤C D3 ≤0.230 at a Reynolds number of 120,000 and a spin ratio of 0.100.
25 . The golf ball according to claim 1 , wherein the integrated drag area is defined such that: 14,000≤DA≤14,750.
26 . The golf ball according to claim 1 , wherein the integrated drag area is defined such that: 14,000≤DA≤14,500.
27 . The golf ball according to claim 1 , wherein the integrated drag area is defined such that: 13,750≤DA≤14,500.
28 . The golf ball according to claim 1 , wherein the integrated drag area is defined such that: 14,250≤DA≤14,750.
29 . A golf ball comprising at least a core and a cover,
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;
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:
0.225≤C D1 ≤0.235 at a Reynolds number of 220,000 and a spin ratio of 0.070,
0.225≤C D2 ≤0.235 at a Reynolds number of 160,000 and a spin ratio of 0.095, and
0.225≤C D3 ≤0.235 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
=
∫
1
6
0
,
0
0
0
2
2
5
,
0
0
0
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: 13,750≤DA≤14,750,
wherein the golf ball has compression (C 0 ) that is greater than 40 and a coefficient of restitution (COR ball ), such that:
-
9.71
×
1
0
-
6
C
0
2
+
5
.
4
6
×
1
0
-
4
C
0
+
0
.
7
6
5
≤
COR
ball
;
(
i
)
and
COR
ball
≤
-
8
.
1
4
×
1
0
-
6
C
0
2
+
7
.
2
4
×
1
0
-
4
C
0
+
0
.
8
0
9
.
(
ii
)
30 . The golf ball according to claim 29 , wherein the golf ball has a Flight Factor (F) defined by the following equation:
F
=
D
A
×
W
c
o
r
e
×
D
c
o
r
e
×
(
C
D
1
+
C
D
2
+
C
D
3
)
IV
ball
×
COR
ball
×
COR
c
o
r
e
,
where (IV ball ) is the golf ball initial velocity (feet/second) and (COR core ) is the core coefficient of restitution, and
wherein the Flight Factor (F) is at least 130.