GOLF CLUB ASSEMBLY AND GOLF CLUB WITH AERODYNAMIC FEATURES

1 . A golf club head comprising:

a body member having a ball striking face, a crown, a toe, a heel, a sole and a back,

wherein the body member is configured for attachment to a shaft having a longitudinal axis, the body member including an apex point located on the leading edge of the heel;

the body member having a first cross-section oriented generally parallel to a front face of the club head, the first cross-section including the apex point and an x 1 -axis extending from the apex point at a predetermined angle relative to the ground surface, the first cross-section having a first quasi-parabolic crown-side surface defined relative to the x 1 -axis;

the body member having a second cross-section oriented at an angle rearwardly from the first cross-section, the second cross-section including the apex point and an x 2 -axis extending from the apex point at the same predetermined angle as the x 1 -axis, the second cross-section having a second quasi-parabolic crown-side surface defined relative to the x 2 -axis,

wherein the second quasi-parabolic crown-side surface is flatter than the first quasi-parabolic crown-side surface in the heel region.

2 . The golf club head of claim 1 ,

wherein the first cross-section has a first quasi-parabolic sole-side surface defined relative to the x 1 -axis, and

wherein the first quasi-parabolic crown-side surface is flatter than the first quasi-parabolic sole-side surface in the heel region.

3 . The golf club head of claim 1 ,

wherein the second cross-section has a second quasi-parabolic sole-side surface defined relative to the x 2 -axis, and

wherein the second quasi-parabolic crown-side surface is flatter than the second quasi-parabolic sole-side surface in the heel region.

4 . The golf club head of claim 1 ,

wherein the first cross-section has a first quasi-parabolic sole-side surface defined relative to the x 1 -axis,

wherein the second cross-section has a second quasi-parabolic sole-side surface defined relative to the x 2 -axis, and

wherein the second quasi-parabolic sole-side surface is smaller than the first quasi-parabolic sole-side surface in the heel region.

5 . The golf club head of claim 4 ,

wherein the coordinate values of the second quasi-parabolic sole-side surface are within 10% of the coordinate values of the first quasi-parabolic sole-side surface in the heel region.

6 . The golf club head of claim 1 ,

wherein the first cross-section has a first quasi-parabolic sole-side surface defined relative to the x 1 -axis,

wherein the second cross-section has a second quasi-parabolic sole-side surface defined relative to the x 2 -axis, and

wherein the first quasi-parabolic crown-side surface is flatter than the first quasi-parabolic sole-side surface in the heel region, and

wherein the second quasi-parabolic crown-side surface is flatter than the second quasi-parabolic sole-side surface in the heel region.

7 . The golf club head of 1 , wherein the second quasi-parabolic crown-side surface is flatter than the first quasi-parabolic crown-side surface within the first 24 mm from the apex point.

8 . The golf club head of claim 1 ,

wherein the body member has a third cross-section oriented at an angle rearwardly from the second cross-section, the third cross-section including the apex point and an x 3 -axis extending from the apex point at the same predetermined angle as the x 1 -axis, the third cross-section having a third quasi-parabolic crown-side surface defined relative to the x 3 -axis,

wherein the third quasi-parabolic crown-side surface is flatter than the second quasi-parabolic crown-side surface in the heel region.

9 . The golf club head of claim 1 , wherein the apex point is located approximately 10 mm to approximately 30 mm from the longitudinal axis of the shaft.

10 . The golf club head of claim 1 , wherein the body member further includes a groove extending at least partially along a horizontal length of the toe and extending at least partially along a horizontal length of the back.

11 . The golf club head of claim 1 , wherein the first cross-section has a first concave-shaped surface opposed to the leading edge in the heel.

12 . The golf club head of claim 1 , wherein the sole includes a recess extending across the sole in a generally heel-to-toe direction at an angle that ranges from approximately 10° to approximately 80° from the centerline.

13 . The golf club head of claim 1 , wherein the club head has a volume of 420 cc or greater, a club breadth-to-face length ratio of 0.92 or greater, and a face height of 53 mm or greater.

14 . A golf club comprising:

a shaft; and

the golf club head according claim 1 , wherein the golf club head is secured to a first end of the shaft.

15 . A golf club head comprising:

a body member having a ball striking face, a crown, a toe, a heel, a sole and a back,

wherein the body member is configured for attachment to a shaft having a longitudinal axis, the body member including an apex point located on a leading edge of the heel;

the body member having a first cross-section oriented at approximately 90° from a centerline of the club head, wherein the first cross-section has a first airfoil-shaped curvature in the heel, wherein the first cross-section includes the apex point located in the heel, a first crown-side surface curve extending from the apex point and a first sole-side surface curve extending from the apex point, and wherein the apex point represents an origin of a first x 1 - and z 1 -coordinate system oriented in the plane of the first cross-section at a roll angle of approximately 15°;

the body member having a second cross-section oriented at approximately 70° from the centerline of the club head, wherein the second cross-section has a second airfoil-shaped curvature in the heel, wherein the second cross-section includes the apex point located in the heel, a second crown-side surface curve extending from the apex point and a second sole-side surface curve extending from the apex point, and wherein the apex point represents an origin of a second x 2 - and z 2 -coordinate system oriented in the plane of the second cross-section at a roll angle of approximately 15°, and

wherein the second crown-side surface is flatter than the first crown-side surface over the x 1 - and x 2 -coordinate ranges of 0 mm to 48 mm.

16 . The golf club head of claim 15 , wherein the first crown-side surface z 1 -coordinates over the x 1 -coordinate range of 0 mm to 24 mm, are greater than or equal to the second crown-side surface z 2 -coordinates over the x 2 -coordinate range of 0 mm to 24 mm.

17 . The golf club head of claim 15 , wherein the first crown-side surface z 1 -coordinates over the x 1 -coordinate range of 0 mm to 24 mm are within approximately 10% of the second crown-side surface z 2 -coordinates over the x 2 -coordinate range of 0 mm to 24 mm.

18 . The golf club head of claim 15 , wherein the first crown-side surface is flatter than the first sole-side surface over the x 1 -coordinate range of 0 mm to 48 mm.

19 . The golf club head of claim 15 , wherein the second sole-side surface is flatter than the first crown-side surface over the x 1 - and x 2 -coordinate ranges of 0 mm to 48 mm.

20 . The golf club head of claim 15 , wherein the second crown-side surface is flatter than the second sole-side surface over the x 2 -coordinate range of 0 mm to 48 mm.

21 . The golf club head of claim 15 ,

wherein the body member has a third cross-section oriented at approximately 45° from a centerline of the club head, wherein the third cross-section has a third airfoil-shaped curvature in the heel, wherein the third cross-section includes the apex point located in the heel, a third crown-side surface curve extending from the apex point and a third sole-side surface curve extending from the apex point, and wherein the apex point represents an origin of a third x 3 - and z 3 -coordinate system oriented in the plane of the third cross-section at a roll angle of approximately 15°,

wherein the third crown-side surface is flatter than the third sole-side surface over the x 3 -coordinate range of 0 mm to 48 mm.

22 . The golf club head of claim 21 ,

wherein the third crown-side surface is flatter than the first crown-side surface over the x 1 - and x 3 -coordinate ranges of 0 mm to 48 mm, and

wherein the third sole-side surface is flatter than the first crown-side surface over the x 1 - and x 3 -coordinate ranges of 0 mm to 48 mm.

23 . The golf club head of claim 15 , wherein the first sole-side surface z 1 -coordinates over the x 1 -coordinate range of 0 mm to 24 mm are greater than or equal to the second sole-side surface z 2 -coordinates over the x 2 -coordinate range of 0 mm to 24 mm.

24 . The golf club head of claim 15 , wherein the first sole-side surface z 1 -coordinates over the x 1 -coordinate range of 0 mm to 24 mm are within approximately 10% of the second sole-side surface z 2 -coordinates over the x 2 -coordinate range of 0 mm to 24 mm.

25 . The golf club head of claim 15 ,

wherein the body member is configured for attachment to a shaft having a longitudinal axis, and

wherein the apex point is located approximately 10 mm to approximately 30 mm from the longitudinal axis of the shaft.

26 . The golf club head of claim 15 , wherein the body member further includes a groove extending at least partially along a horizontal length of the toe and extending at least partially along a horizontal length of the back.

27 . The golf club head of claim 15 , wherein the first cross-section has a first concave-shaped surface opposed to the first airfoil-shaped curvature in the heel.

28 . The golf club head of claim 15 , wherein the sole includes a recess extending across the sole in a generally heel-to-toe direction at an angle that ranges from approximately 10° to approximately 80° from the centerline.

29 . A golf club comprising:

a shaft; and

the golf club head according to claim 15 , wherein the golf club head is secured to a first end of the shaft.