Mean aerodynamic chord (MAC)

Mean Aerodynamic Chord (MAC)

Mean Aerodynamic Chord (MAC) is the average distance measured from the leading edge to the trailing edge of an airplane’s wing. It represents a critical parameter in calculating various aerodynamic properties of an aircraft, such as the lift, drag, and stability.

The MAC is determined by dividing the wing into small sections of equal span and finding their individual chords- lines connecting the leading and trailing edges of each section. The lengths of each chord are then weighted by the section’s percentage of the total wing area, and the resulting product is summed up to obtain the MAC.

The MAC is an important factor in designing and managing the flight characteristics of an airplane. In particular, the positioning of the aircraft’s center of gravity relative to the MAC is vital for ensuring proper stability and handling. It also has a profound effect on the wing’s lift and drag characteristics, which can impact the plane’s efficiency, range, and speed.

Overall, the mean aerodynamic chord is an essential parameter that engineers, pilots, and designers use to ensure the safety and performance of aircraft. Its accurate determination and management are crucial for both the aircraft’s aerodynamic performance and its overall safety.