Aerodynamics Effects On Baseball

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Register to read the introduction… If the axis is vertical, the lift force is horizontal and the ball can be made to curve to one side. If the axis is horizontal, the lift force is vertical and the ball can be made to dive or rise depending on the direction of rotation.
A baseball in flight is neither smooth nor symmetric because of the stitches. So the center of pressure for a baseball moves slightly about the center of the ball with time, depending on the orientation of the stitches. The lift coefficient - Cl for the baseball was finely determined by high speed photography of the flight of a pitched ball in many laboratories.
The motion of the ball through the air depends on the relative strength and direction of the forces. We will look at the pitching of a curve ball. The curve ball problem involves all three forces with an additional force called the Magnus force. This force is a lift force generated from the spinning of the baseball produces the side force that causes the ball to curve. However the magnitude of this lift force that is generated by big league pitchers cannot generate enough lift force to overcome the weight of the ball. There are no rising fast balls, yet.
The Magnus
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For a spinning fastball the speed of the ball is relative to the air and the Speed or pressure is different on opposite sides of the ball. The lower side of the ball has a larger speed (pressure) compared to the air than the upper side. This results in a larger drag force acting on the lower surface of the ball than on the upper surface. If we think of drag forces as exerting a sort of pressure on the ball then we can understand that when the unequal drag forces acting on the ball's upper and lower surfaces are added together there is a resultant force acting upwards. This force--which is known as the Magnus force, after the German physicist Heinrich Magnus, who first described it in 1853--is the dominant spin-dependent force acting on baseballs. Magnus force can make a baseball do many different things. Depending on how the pitcher holds and the type of release he has. The ball with its rotation and don’t forget the stitches will cause different forces to act on the ball some pitchers have even been known to make the ball

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