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, a casing layer, 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 of at least 1.245 ounces and a diameter of at least 1.525 inches;
the cover comprising a plurality of dimples comprised of 280-320 dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that:
0.226≤C D1 ≤0.230 at a Reynolds number of 220,000 and a spin ratio of 0.070,
0.228≤C D2 ≤0.234 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;
wherein the dimple pattern has 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: 14,100≤DA≤14,500;
wherein C L ≥0.130 at a Reynolds number of 240,000 and a spin ratio of 0.060;
wherein the drag coefficient and the lift coefficient at a Reynolds number of 225,000 and a spin ratio of 0.070 have the following relationship: 1.600≤C D /C L ≤1.615, and
wherein:
(i) the golf ball has a compression that is less than 60, and the golf ball has a coefficient of restitution (COR) of 0.785-0.815;
(ii) the golf ball has a compression of at least 60 and less than 80, and the golf ball has a COR of 0.770-0.815;
(iii) the golf ball has a compression of at least 80 and less than 100, and the golf ball has a COR of 0.740-0.810; or
(iv) the golf ball has a compression of at least 100, and the golf ball has a COR of 0.710-0.780.
2 . 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
.
4
4
(
IV
ball
)
,
where COR ball is the golf ball coefficient of restitution and IV ball is the golf ball initial velocity (in feet/second), and wherein the Speed Factor is at least 177 and no greater than 181.
3 . The golf ball according to claim 1 , wherein the dimple pattern is comprised of at least eight different dimple diameters.
4 . The golf ball according to claim 1 , wherein a volume of the plurality of dimples is 0.0400 in 3 -0.0420 in 3 .
5 . The golf ball according to claim 1 , wherein the dimple pattern has 290-302 dimples.
6 . The golf ball according to claim 1 , wherein the average dimple diameter is 0.170 inches-0.185 inches.
7 . The golf ball according to claim 1 , wherein the dimple pattern has a surface coverage of 82.5%-84.5%.
8 . The golf ball according to claim 1 , wherein a minimum dimple diameter disparity is 0.001 inches-0.010 inches, and a maximum dimple diameter disparity is 0.015 inches-0.025 inches.
9 . The golf ball according to claim 1 , wherein C L ≤0.175 at a Reynolds number of 185,000 and a spin ratio of 0.105.
10 . The golf ball according to claim 1 , wherein the golf ball is a four-layer golf ball, and the core is a dual layer core.
11 . The golf ball according to claim 1 , wherein the golf ball compression is at least 90.
12 . The golf ball according to claim 1 , wherein the golf ball coefficient of restitution is no greater than 0.790.
13 . The golf ball according to claim 1 , wherein the casing has a thickness of 0.030 inches-0.055 inches.
14 . The golf ball according to claim 1 , wherein the cover has a thickness of 0.020 inches-0.035 inches.
15 . The golf ball according to claim 1 , wherein the core has a weight of at least 1.295 ounces.
16 . The golf ball according to claim 1 , wherein the core has a diameter of at least 1.545 inches.
17 . The golf ball according to claim 1 , wherein the core has a coefficient of restitution of no greater than 0.780.
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 casing has a thickness of 0.045 inches-0.055 inches.
20 . The golf ball according to claim 1 , wherein the cover has a thickness of 0.020 inches-0.030 inches.
21 . The golf ball according to claim 1 , wherein the golf ball compression is less than 60, and the golf ball COR is 0.785-0.815.
22 . The golf ball according to claim 1 , wherein the golf ball compression is at least 60 and less than 80, and the golf ball COR is 0.770-0.815.
23 . The golf ball according to claim 1 , wherein the golf ball compression is at least 80 and less than 100, and the golf ball COR is 0.740-0.810.
24 . The golf ball according to claim 1 , wherein the golf ball compression is at least 100, and the golf ball COR is 0.710-0.780.
25 . A golf ball comprising at least a core, a casing layer, 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 of at least 1.245 ounces and a diameter of at least 1.525 inches;
the cover comprising a plurality of dimples comprised of 280-320 dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that:
0.226≤C D 1≤0.230 at a Reynolds number of 220,000 and a spin ratio of 0.070,
0.228≤C D 2≤0.234 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;
wherein the dimple pattern has 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: 14,100≤DA≤14,500;
wherein C L ≥0.130 at a Reynolds number of 240,000 and a spin ratio of 0.060;
wherein the drag coefficient (C D ) and the lift coefficient (C L ) at a Reynolds number of 225,000 and a spin ratio of 0.070 have the following relationship: 1.600≤C D /C L ≤1.615, and
wherein the golf ball has a compression (C 0 ) that is greater than 40, and the golf ball has a coefficient of restitution (COR), such that:
-
9.71
×
1
0
-
6
C
0
2
+
5
.
4
6
×
1
0
-
4
C
0
+
0
.
7
6
5
≤
COR
;
(
i
)
and
COR
≤
-
8
.
1
4
×
1
0
-
6
C
0
2
+
7
.
2
4
×
1
0
-
4
C
0
+
0
.
8
0
9
.
(
ii
)