1. have a launch monitor
  2. have a golf club
  3. have golf balls
  4. hit a 90mph clubhead speed shot
  5. hit a 110mph clubhead speed shot
  6. hit a 120mph clubhead speed shot
how clubhead speed effects the spin and smash factor of a golf ball
clubhead speed spin rate smashfactor distance (yards)
90mph 1800rpm 1.23 230
110mph 2300rpm 1.4 280
120mph 2600rpm 1.50 310