Golf club assembly and golf club with aerodynamic features

1. A golf club head for a metal wood type club, the club head comprising:

a body member having a ball striking face, a heel, a toe, a back, a crown, a sole, and a hosel region located at the intersection of the ball striking face, the heel and the crown;

the sole including a channel extending from the hosel region toward the toe; and

an insert received within the channel, the insert defining a recess in its exposed surface; and

means for detachably securing the insert to the channel.

2. The golf club head of claim 1 , wherein the length of the channel extending from the hosel region toward the toe is at least 80% of the length of the club head.

3. The golf club head of claim 1 , wherein the channel has a maximum width of greater than or equal to 20 mm.

4. The golf club head of claim 1 , wherein the channel has a maximum depth of less than or equal to 6 mm.

5. The golf club head of claim 1 , wherein the width of the channel decreases as it extends toward the toe.

6. The golf club head of claim 1 , wherein the channel extends into the toe such that it can be viewed from the toe side when the club head is in the 60° lie angle position.

7. The golf club head of claim 1 , wherein the length of the insert is at least 80% of the length of the club head.

8. The golf club head of claim 1 , wherein the thickness of at least a portion of the insert is less than the depth of the channel.

9. The golf club head of claim 1 , wherein the footprint of the insert is different than the footprint of the channel.

10. The golf club head of claim 1 , wherein the insert has a surface region with a surface roughness of greater than or equal to 1.00 μm.

11. The golf club head of claim 1 , wherein the recess forms an elongated feature extending generally in the heel-to-toe direction of the club head.

12. The golf club head of claim 1 , wherein the insert is made of injection molded plastic.

13. The golf club head of claim 1 , wherein the means for securing the insert to the channel includes at least one of threaded fastener, a snap fit mechanism, and a sliding mechanism.

14. The golf club head of claim 1 , wherein the means for securing the insert to the channel includes an adhesive.

15. The golf club head of claim 1 , wherein the body member has a height-to-length ratio of less than or equal to 0.50.

16. The golf club head of claim 1 , wherein the body member has a height-to-volume ratio less than or equal to 0.120.

17. The golf club head of claim 1 , wherein the body member has a breadth-to-volume ratio greater than or equal to 0.260.

18. The golf club head of claim 1 , wherein the body member has a volume of greater than or equal to 420 cc.

19. The golf club head of claim 1 , wherein the body member is teardrop shaped.

20. The golf club head of claim 19 , wherein an angle, defined between a first tangent to the club head taken where the club head length lead-line at the outermost point of the heel intersects the profile of the ball striking face and a second tangent to the club head taken where the club head length lead-line at the outermost point of the heel intersects the profile of the heel, as viewed from above, ranges from approximately 80 degrees to approximately 90 degrees.

21. A golf club head for a metal wood type club, the club head comprising:

a metal body member having a generally pear shape having a first round end and a second round end when viewed from above, the first rounded end being more narrow than the second rounded end, the body member defining a ball striking face, a heel, a toe forming at least a portion of the second rounded end, a back forming at least a portion of the second rounded end, a crown having a generally smooth convex surface, a sole, and a hosel region forming at least a portion of the first rounded end and located at the intersection of the ball striking face, the heel and the crown;

the sole including a channel extending from proximate the hosel region toward the toe, the channel defining a surface having one of a protrusion and a notch; and

a plastic injection-molded insert defining the other of the protrusion and the notch, the insert having a textured surface thereon and the insert being received within the channel, wherein the notch receives the protrusion to secure the insert to the channel.

22. The golf club head of claim 21 , wherein the insert is selected from a plurality of inserts.

23. The golf club head of claim 21 , wherein the channel has a width and wherein the channel width decreases from the hosel region towards the toe.

24. The golf club head of claim 21 , wherein the channel has a depth and wherein the channel depth is constant.

25. The golf club head of claim 21 , wherein the channel defines a pair of sidewalls, wherein the protrusion is located on the channel and comprises a plurality of protrusions located on the sidewalls, and wherein the notch is located on the insert and comprises a plurality of notches, the plurality of protrusions being received within the plurality of notches to secure the insert to the channel.

26. The golf club head of claim 25 , wherein the channel defines an end wall, the end wall having a receptacle, the insert further having a projection, wherein the projection is received in the receptacle.

27. The golf club head of claim 21 , wherein the insert is substantially trapezoidally-shaped.

28. The golf club head of claim 21 , wherein the channel has a width and a length and wherein the insert extends the entire width of the channel and extends a partial length of the channel.

29. The golf club head of claim 21 , wherein the channel has a depth and the insert has a step that extends outwardly from the channel.

30. The golf club head of claim 21 , wherein a diffuser is included on the sole proximate the back of the body member.