GOLF BALL
A golf ball is disclosed herein that has at least one modified aerodynamic characteristic or performance trait. More specifically, the golf ball disclosed herein can include a dimple pattern having a specific drag coefficient and/or specific integrated drag area.
1 . A golf ball comprising at least a core, a casing layer, and a cover formed from urethane,
the golf ball having a weight of 1.600 ounces-1.620 ounces, a diameter of 1.680 inches-1.700 inches, a compression of at least 90, a coefficient of restitution of at least 0.805, and an initial velocity of at least 250 feet/second;
the core having a weight of at least 1.245 ounces, a diameter of at least 1.525 inches, and a coefficient of restitution of at least 0.785;
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 0.235≤C D ≤0.245 at a Reynolds number of 220,000 and a spin ratio of 0.070, 0.235≤C D ≤0.245 at a Reynolds number of 160,000 and a spin ratio of 0.095, and 0.235≤C D ≤0.245 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
225
,
000
C
D
(
Re
)
d
Re
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 14,500≤DA≤15,150;
wherein C L ≥0.130 at a Reynolds number of 240,000 and a spin ratio of 0.060; and
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: 1.625≤C D /C L ≤1.700.
2 . The golf ball according to claim 1 , wherein the golf ball compression is at least 92.
3 . The golf ball according to claim 1 , wherein the golf ball compression is at least 100.
4 . The golf ball according to claim 1 , wherein the golf ball coefficient of restitution is at least 0.807.
5 . The golf ball according to claim 1 , wherein the casing has a thickness of 0.045 inches-0.055 inches.
6 . The golf ball according to claim 1 , wherein the casing has a thickness of 0.030 inches-0.040 inches.
7 . The golf ball according to claim 1 , wherein the casing has a thickness of 0.032 inches-0.038 inches.
8 . The golf ball according to claim 1 , wherein the cover has a thickness of 0.020 inches-0.030 inches.
9 . The golf ball according to claim 1 , wherein the cover has a thickness of 0.025 inches-0.035 inches.
10 . The golf ball according to claim 1 , wherein the cover has a thickness of 0.028 inches-0.032 inches.
11 . The golf ball according to claim 1 , wherein the core has a weight of at least 1.250 ounces.
12 . The golf ball according to claim 1 , wherein the core has a weight of at least 1.290 ounces.
13 . The golf ball according to claim 1 , wherein the core has a diameter of at least 1.530 inches.
14 . The golf ball according to claim 1 , wherein the core has a diameter of at least 1.545 inches.
15 . The golf ball according to claim 1 , wherein the core has a coefficient of restitution of 0.790-0.805.
16 . The golf ball according to claim 1 , wherein the core has a coefficient of restitution of 0.795-0.805.
17 . The golf ball according to claim 1 , wherein the golf ball is a three-layer golf ball.
18 . The golf ball according to claim 1 , wherein the golf ball is a four-layer golf ball.
19 . The golf ball according to claim 1 , wherein the core is a dual layer core.
20 . The golf ball according to claim 1 , wherein the dimple pattern has 250-290 dimples.
21 . The golf ball according to claim 1 , wherein a dimple volume is 0.0435 in 3 -0.0455 in 3 .
22 . The golf ball according to claim 1 , wherein the dimple pattern has a surface coverage of 79.0%-81.5%.
23 . The golf ball according to claim 1 , wherein the dimple pattern comprises at least four different dimple diameters.
24 . The golf ball according to claim 1 , wherein an average dimple diameter is 0.180 inches-0.190 inches.
25 . The golf ball according to claim 1 , wherein a minimum dimple diameter disparity is 0.005 inches-0.015 inches.
26 . The golf ball according to claim 1 , wherein a maximum dimple diameter disparity is 0.030 inches-0.045 inches.
27 . The golf ball according to claim 1 , wherein a minimum dimple diameter is 0.130 inches-0.145 inches.
28 . The golf ball according to claim 1 , wherein a maximum dimple diameter is 0.195 inches-0.215 inches.
29 . The golf ball according to claim 1 , wherein C L ≤0.185 at a Reynolds number of 185,000 and a spin ratio of 0.105.
30 . A three layer golf ball comprising a core, a casing layer, and a cover formed from urethane,
the golf ball having a weight of 1.600 ounces-1.620 ounces, a diameter of 1.680 inches-1.700 inches, a compression of at least 92, a coefficient of restitution of at least 0.805, and an initial velocity of at least 250 feet/second;
the core having a weight of at least 1.245 ounces, a diameter of at least 1.525 inches, and a coefficient of restitution of at least 0.790, and the casing having a thickness of 0.045 inches-0.055 inches;
the cover having a thickness of 0.020 inches-0.030 inches and comprising a plurality of dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that 0.235≤C D ≤0.245 at a Reynolds number of 220,000 and a spin ratio of 0.070, 0.235≤C D ≤0.245 at a Reynolds number of 160,000 and a spin ratio of 0.095, and 0.235≤C D ≤0.245 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
225
,
000
C
D
(
Re
)
d
Re
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 14,500≤DA≤15,150;
wherein C L ≥0.130 at a Reynolds number of 240,000 and a spin ratio of 0.060; and
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: 1.625≤C D /C L ≤1.700.
31 . A four layer golf ball comprising a dual layer core, a casing layer, and a cover formed from urethane,
the golf ball having a weight of 1.600 ounces-1.620 ounces, a diameter of 1.680 inches-1.700 inches, a compression of at least 100, a coefficient of restitution of at least 0.807, and an initial velocity of at least 250 feet/second;
the core having a weight of at least 1.290 ounces, a diameter of at least 1.545 inches, and a coefficient of restitution of at least 0.790, and the casing having a thickness of 0.030 inches-0.040 inches;
the cover having a thickness of 0.025 inches-0.035 inches and comprising a plurality of dimples arranged in a dimple pattern having a drag coefficient (C D ) and a lift coefficient (C L ), such that 0.235≤C D ≤0.245 at a Reynolds number of 220,000 and a spin ratio of 0.070, 0.235≤C D ≤0.245 at a Reynolds number of 160,000 and a spin ratio of 0.095, and 0.235≤C D ≤0.245 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
25
,
000
C
D
(
Re
)
d
Re
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 14,500≤DA≤15,150;
wherein C L ≥0.130 at a Reynolds number of 240,000 and a spin ratio of 0.060; and
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: 1.625≤C D /C L ≤1.700.