Golf clubs, of putter and wood-type especially, each include an attachment
between shaft and club head which is of a compliance to allow the club
head to behave more closely as a `free-body` in providing vertical
gear-effect when striking the ball. The compliance is related to freeing
the club head for rotation about an axis 35 which extends through the
center of mass 31 with an orientation perpendicular to the shaft axis 37
in a plane parallel to the shaft axis 37 and containing the heel-toe axis
34 through the center of mass 31. In this regard, the compliance about
axis 35 is not less than the force-couple bending compliance of a length
of 1000/K, or 3000/K, or more preferably 10000/K, millimeters of the
shaft measured from the tip-end. The rotational axis 35 is spaced by less
than 0.33K millimeters, or not more than 4,25 or less than 2 millimeters,
from the shaft axis 37. The center of mass 31 is located not less than 10
millimeters, and preferably not less than 15 millimeters, behind the
impact face, and is not more than 13 millimeters, and preferably not more
than 10 millimeters, above the sole of the club. The spacing DD between
the shaft-attachment 38 and the rotational axis 35 is less than 2K
millimeters or preferably less than K millimeters.