Golf club heads with similar c.g.-neutral axis distance

Abstract

A plurality of golf club heads wherein the difference in spin is minimized is disclosed herein. More specifically, the present invention discloses a plurality of fairway wood type golf club head with a volume of between about 110 cubic centimeters (cc) and about 250 cc, wherein the change in backspin between any two clubs within the plurality of metal wood type golf club heads is less than about 600 revolutions per minute (rpm). A plurality of golf clubs in accordance with the present invention may generally have all of its clubs maintain a center of gravity (CG) location that is less than about 8.0 mm away from a neutral axis of the golf club head regardless of the difference in loft of the specific golf club head within the plurality of golf club heads.

1 - 19 . (canceled) 
     
     
         20 . A plurality of golf club heads comprising:
 a first hollow golf club head having a first volume and comprising:
 a first striking face having a first loft angle and a first face center defining a first neutral axis normal to the first striking face and passing through the first face center; and 
 a first center of gravity located at a first CG location distance away from the first neutral axis; and 
   a second hollow golf club head having a second volume and comprising:
 a second striking face having a second loft angle greater than the first loft angle and having a second face center defining a second neutral axis normal to the second striking face and passing through the second face center; and 
 a second center of gravity located at a second CG location distance away from the second neutral axis; and 
   wherein a first volume to CG location distance ratio of the first hollow golf club head is greater than a second volume to CG location distance ratio of the second hollow golf club head,   wherein the volume to CG location distance ratio is defined as the volume of a club head divided by the distance between the center of gravity location of the club head and the neutral axis of the club head.   
     
     
         21 . The plurality of golf club heads of  claim 20 , wherein the first and second hollow golf club heads each have a volume of greater than about 110 cc and less than about 250 cc. 
     
     
         22 . The plurality of golf club heads of  claim 20 , wherein the volume of the first hollow golf club head is different than the volume of the second hollow golf club head. 
     
     
         23 . The plurality of golf club heads of  claim 22 , wherein the volume of the first hollow golf club head is greater than the volume of the second hollow golf club head. 
     
     
         24 . The plurality of golf club heads of  claim 20 , wherein a difference between the first volume to CG location distance ratio and the second volume to CG location distance ratio is less than about 50 cm 2 . 
     
     
         25 . The plurality of golf club heads of  claim 24 , wherein the difference between the first volume to CG location distance ratio and the second volume to CG location distance ratio is less than about 48 cm 2 . 
     
     
         26 . The plurality of golf club heads of  claim 25 , wherein the difference between the first volume to CG location distance ratio and the second volume to CG location distance ratio is less than about 46 cm 2 . 
     
     
         27 . The plurality of golf club heads of  claim 20 , wherein the first hollow golf club head has a volume to CG location distance ratio of greater than about 225 cm 2  and less than about 245 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of greater than about 202 cm 2  and less than about 222 cm 2 . 
     
     
         28 . The plurality of golf club heads of  claim 27 , wherein the first hollow golf club head has a volume to CG location distance ratio of about 235 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of about 212 cm 2 . 
     
     
         29 . The plurality of golf club heads of  claim 20 , wherein the first hollow golf club head has a volume to CG location distance ratio of greater than about 225 cm 2  and less than about 245 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of greater than about 184 cm 2  and less than about 204 cm 2 . 
     
     
         30 . The plurality of golf club heads of  claim 29 , wherein the first hollow golf club head has a volume to CG location distance ratio of about 235 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of about 194 cm 2 . 
     
     
         31 . The plurality of golf club heads of  claim 20 , wherein the first hollow golf club head has a volume to CG location distance ratio of greater than about 202 cm 2  and less than about 222 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of greater than about 184 cm 2  and less than about 204 cm 2 . 
     
     
         32 . The plurality of golf club heads of  claim 31 , wherein the first hollow golf club head has a volume to CG location distance ratio of about 212 cm 2  and the second hollow golf club head has a volume to CG location distance ratio of about 194 cm 2 . 
     
     
         33 . The plurality of golf club heads of  claim 20 , wherein a difference between the first CG location distance and the second CG location distance is less than about 1.00 mm. 
     
     
         34 . The plurality of golf club heads of  claim 33 , wherein a difference between the first CG location distance and the second CG location distance is less than about 0.75 mm. 
     
     
         35 . The plurality of golf club heads of  claim 20 , wherein the first CG location distance and the second CG location distance are each greater than about 5.0 mm and less than about 8.0 mm. 
     
     
         36 . The plurality of golf club heads of  claim 20 , wherein each of the first and second loft angles of the first and second striking faces are between about 14 degrees and about 24 degrees. 
     
     
         37 . The plurality of golf club heads of  claim 20 , wherein the first CG location distance is defined as the distance between the first center of gravity location and the first neutral axis of the first hollow golf club head as measured along a line that runs normal from the first neutral axis to the first center of gravity location. 
     
     
         38 . The plurality of golf club heads of  claim 20 , wherein the second CG location distance is defined as the distance between the second center of gravity location and the second neutral axis of the second hollow golf club head as measured along a line that runs normal from the second neutral axis to the second center of gravity location.