A3 Aerodynamic force on spinning soccer ball in the wind tunnel

Abstract

Accurate method to measure aerodynamic force on spinning soccer ball is studied. To get smooth rotation of soccer ball in wind tunnel flow, rotation shaft was inserted in the ball after filled with a foaming urethane agent, to keep sphere shape of the ball. Static balance around rotation shaft is hold kept using some weight balances. But, dynamic balance around this shaft is not enough to continue wind tunnel experiment for aerodynamic force measurement.