Camber refers to the curve shape of an aerofoil from its front edge to the back edge. It plays a crucial role in generating lift, which depends on factors like airspeed, angle of attack, and overall design of the aerofoil. The camber can change based on the intended speed and use of the aerofoil. Typically, the top surface of the aerofoil has a positive camber, while the bottom surface can have a positive, flat, or negative camber, depending on its specific application.
Aerofoils with identical camber on both the upper and lower surfaces are called symmetrical. This design is often used in aerobatic aircraft that perform inverted flight. On the other hand, supercritical aerofoils usually feature a negatively cambered lower surface. Designers may also adjust the camber along the wing’s length to enhance stall behavior and recovery. Understanding these variations in camber is vital for effective aerofoil design.