Patent ID: 7762911
Filing Date: 2010-07-27
Classification: A63B

Abstract:
1. A method for predicting velocity, launch angle and/or spin rate of a golf ball following an impact with a golf club or a slug comprising the steps of a. determining at least one pre-impact swing conditions; b. determining at least one property of the golf club; c. calculating a normal force of the impact in a normal direction; d. calculating a transverse force of the impact in a transverse direction; and e. predicting the velocity, launch angle and/or spin rate from steps a-d; wherein the force deformation equation based on Hertzian force deformation equations for step (c) is wherein ξ=ball deformation, wherein, the ratio of (ξ) to a is greater than ⅓ and the dampening constant, α, is calculated using the following equation: wherein V normal is the initial velocity of relative impact.