Different golf balls can affect the result of the shot. The different constructions of each ball can change the possible flight distances of the ball. Although different subjects may have different results with each ball, construction has an effect on the outcome. Dimples affect the airflow around the ball and different dimples have different effects. Golf balls haven't always had dimples. The balls used to play golf were once made of wood. They then evolved into plumage. A feather is a leather pouch filled with wet goose feathers. When the leather dried, the ball would shrink and harden. They worked well in good weather conditions, but when the feathers were wet they didn't work as well. Other types of golf balls were made after the creation of the Featherie. The guttie was a rubber ball that worked well in wet conditions, unlike the Featherie. As guts were used, players found that the dirty, battered balls with pieces removed worked better than the new, smooth balls. Ball makers began making molds with bumps and ridges so that balls would fly as smoothly as possible early in the game. After the discovery that balls that were not smooth flew better, dimples appeared in the world golf. The dimples are there to reduce the drag of the golf ball. They delay the separation of air particles from the balloon. In doing so, the dimples create less drag, allowing the ball to travel a greater distance. Drag occurs most quickly when air particles separate from the ball at a normal rate. This happens because there is a space between the ball and where the particles separate, which creates a vacuum effect (Smith, 2010). Every company makes golf balls differently. Some...... middle of paper ......om Subsonic to High Supersonic Velocities." (AIAA). Np, 2012. Web. Oct. 27, 2013. Depeux, Guillaume, Anne Le Goff, David Quéré, and Christophe Clanet. "The Spinning Ball Spiral - IOPscience." The Spinning Ball Spiral - IOPscience, September 2, 2010. Web October 27, 2013. Miller, Erik C. "Effects on the boundary layer caused by the inclusion of dimples. at different depths." (AIAA). Np, 2012. Web. October 27, 2013. Ou, Kui. "Computer sports aerodynamics of a moving sphere: simulation of a ping-pong ball in free flight." (AIAA Np, June 27 -30, 2011. Web. October 27, 2013. Smith, CE, N. Beratlis, E. Balaras, K. Squires, and M. Tsunoda. subcritical and supercritical regimes. "Numerical investigation of the flow over a golf ball in subcritical and supercritical regimes. Np, June 2010. Web. October 27. 2013.