Abstract
The objective of this study is to simultaneously optimize the design of a discus and the skill with which it is thrown. The main question is whether the size of a discus depends on the wind such as the tail or head wind. In order to answer this question, the dependences of size and the angle of attack on the aerodynamic data are estimated by using CFD (computational fluid dynamics) technique. The optimization is carried out with the aid of a genetic algorithm. It was found that there was little deference of the size for tail or head wind.
