Golf club with progressive tapered face thickness

A set of golf clubs comprising a plurality of golf clubs, each club having

• a selected loft angle different from that of each other club in the set;
• a face for striking a ball, comprising a front surface, a rear surface, a top portion and a bottom portion;
• and
• a taper angle defining the orientation of the rear surface of the face relative to the front surface of the face;
• wherein
• the maximum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=0.028(L)−1.9057;
• and
• the minimum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=−0.0008(L2)+0.1624(L)−10.126.

A method of manufacturing a set consisting of a plurality of golf club irons, comprising the steps of forming for each club in the set,

• a selected loft angle different from that of each other club in the set;
• a face for striking a ball, comprising a front surface, a rear surface, a top portion and a bottom portion;
• and
• a taper angle defining the orientation of the rear surface of the face relative to the front surface of the face;
• wherein
• the maximum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=−0.0028(L2)+0.3691(L)−3.9569;
• and
• the minimum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=0.02L−0.275;
• or
• the maximum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=0.0028(L)−1.9057;
• and
• the minimum taper angle t in degrees for any loft angle L in degrees is determined by the relationship t=−0.0008(L2)+0.1624(L)−10.126.