Dimple patterns for golf balls

A golf ball having a spherical outer surface consisting of a first hemisphere and a second hemisphere separated by an equator, the first hemisphere consisting of a plurality of first hemisphere dimples disposed on the surface thereof and the second hemisphere consisting of a plurality of second hemisphere dimples disposed on the surface thereof, wherein each dimple is considered to be located in the hemisphere in which its center is positioned and no dimple has a center positioned on the equator, and wherein:

• the outer surface of the golf ball does not contain a great circle which is free of dimples;
• the plurality of first hemisphere dimples are arranged in a first dimple pattern, wherein the first dimple pattern is rotationally symmetric about a polar axis, the plurality of second hemisphere dimples are arranged in a second dimple pattern, wherein the second dimple pattern is rotationally symmetric about the polar axis, and the first dimple pattern and the second dimple pattern are not identical;
• each of the first dimple pattern and the second dimple pattern has a first aerodynamic coefficient magnitude and a first aerodynamic force angle at a Reynolds number of 230,000 and a spin ratio of 0.085, each of the first dimple pattern and the second dimple pattern has a second aerodynamic coefficient magnitude and a second aerodynamic force angle at a Reynolds number of 170,000 and a spin ratio of 0.110, and:
• (i) the absolute difference between the first aerodynamic coefficient magnitude of the first dimple pattern and the first aerodynamic coefficient magnitude of the second dimple pattern is no more than 0.005;
• (ii) the absolute difference between the first aerodynamic force angle of the first dimple pattern and the first aerodynamic force angle of the second dimple pattern is no more than 0.5°;
• (iii) the absolute difference between the second aerodynamic coefficient magnitude of the first dimple pattern and the second aerodynamic coefficient magnitude of the second dimple pattern is no more than 0.005;
• and
• (iv) the absolute difference between the second aerodynamic force angle of the first dimple pattern and the second aerodynamic force angle of the second dimple pattern is no more than 0.5°;
• and
• the first dimple pattern is different from the second dimple pattern such that one or more of the following is true:
• (i) a majority of the first hemisphere dimples have a first plan shape, a majority of the second hemisphere dimples have a second plan shape, and the first plan shape and the second plan shape are different;
• (ii) a majority of the first hemisphere dimples have a first profile shape, a majority of the second hemisphere dimples have a second profile shape, and the first profile shape and the second profile shape are different;
• (iii) the number of different dimple diameters of the first hemisphere dimples is not equal to the number of different dimple diameters of the second hemisphere dimples;
• (iv) the total number of dimples located in the first hemisphere is not equal to the total number of dimples located in the second hemisphere;
• (v) the absolute difference between the overall dimple surface coverage of the first hemisphere and the overall dimple surface coverage of the second hemisphere is 1.0 percentage points or greater;
• or
• (vi) the absolute difference between the dimple volume of the first hemisphere and the dimple volume of the second hemisphere is 5.0×10−4 in3 or greater.