Which term describes the distance from the leading edge to the trailing edge of an airfoil?

The term that describes the distance from the leading edge to the trailing edge of an airfoil is known as the chord. This measurement is essential in aerodynamics as it helps define the shape and characteristics of the airfoil, which directly affects lift and drag. The chord line is an imaginary straight line connecting the leading and trailing edges, and understanding this concept is crucial for helicopter pilots because it impacts how the rotor blades generate lift and how they interact with the airflow.

Being familiar with the chord of an airfoil allows pilots to better comprehend performance aspects, such as how changes in blade design or configuration can influence flight characteristics. This knowledge is fundamental when conducting calculations for performance charts or understanding aerodynamic principles during flight operations.