IRON GOLD CLUB SET AND IRON GOLF CLUB HEAD SET

摘要

PROBLEM TO BE SOLVED: To improve a driving distance for the numbers of the clubs. SOLUTION: This iron golf club set is formed in a set of three or more numbers (i=1-q) of golf clubs from the golf club of the lowest number having the minimum loft angle to the golf club of the highest number (i=q) having the maximum loft angle. This set is mutually equal in the coefficient of friction of the face of a club head and has a high friction face being the maximum within the set from the lowest number (i=1) to number m (m is a natural number to satisfy 1mq). In addition, in the case where the coefficient of friction of the face of the golf club whose number is i-number (i=1-q) is set as i, the golf club having the number from i=m+1 to q will satisfy the condition of i=(i+1).