Lift and Drag. By David Levin and Dan Hart; Posted 09.30.10; NOVA; Without the aerodynamic forces of lift and drag, aircraft would be unable to fly, wind turbines would not spin, and countless ...

Because of the shape the airflow at the boundry layer would be turbulent, leading to increased drag and less efficiency. A second effect is that most airfoils, will create a pressure difference ...

What separates an airfoil from a flat sheet of paper or balsa wood is the shape of its nose. Once a flat sheet’s angle of attack exceeds a few degrees, it stalls.

Whether the flow is viscous-drag dominated or pressure-drag dominated depends entirely on the shape of the body. A streamlined body looks like a fish, or an airfoil at small angles of attack, whereas ...