Angle of Attack
Sean Fong
Burnaby North Secondary
Floor Location : J 120 P

Angle of AttackrnScience 8/9 HonoursrnBlock H, Ms. WeishauptrnSean FongrnrnI have always been interested in World War II airplanes, so I have chosen to investigate the aerodynamics of the Clark-Y airfoil design. I also wanted to determine the relationship between the amounts of lift created at different angles of attack at three different wind speeds. To answer this, I built a wing and attached it to a stand in a way that I could adjust the wing angle. I attached the wing stand to an electronic balance scale so that I could measure the amount of lift generated at each angular increment from distances of 3, 4, and 5 feet which were equivalent to wind speeds of High, Medium, and Low respectively. I found that for all three wind speeds, a wing angle of 30 degrees produced the most lift than all the other wing increments. Although as you further increased the angle of attack from 30 degrees, the amount of lift produced started to slowly decrease. However, I believe that if I eliminated all the hidden variables and used smaller angular increments, I would be able to receive more detailed results. So I would like to conduct further testing. My results suggest that angles from 50 to 10 degrees had produced the largest amount of lift for this wing. I may also conclude that bigger angles of attack do not necessarily mean larger amounts of lift produced. To conduct further testing, I would construct the wing using the proper tool, test a bigger range of angles used, and test different airfoil designs to determine the exact point for the critical angle of attack and when lift was no longer generated.rn