and normal to trajectory) and gyro spin (spin axis parallel to trajectory) orientations. Balls
were propelled through still air in a laboratory setting at 36 m/s and spin ranging from 1250
rpm to 1750 rpm. Balls were projected with backspin and gyro spin in the two-and four-seam
orientations. Speed and position sensors measured the speed and location of the balls at
three locations from which the coefficient of drag and lift were found. Drag was observed to …