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The flight of a cricket ball after leaving the hand of a bowler is, for given atmospheric conditions, principally governed by the speed of the ball, the angle of the seam to the direction of flight, any rotational spin applied to the ball, and the state of its outer surface with regard to the degree of wear and roughness. This paper desuibes the design of a wind tunnel test rig to accurately measure the net W, drag and side (swing) forces on stationary and spinning cricket balls. Thefatcat:v4bb3ezoujcijkb3ccix4lmzhm