The moment arm from the lift to the trailing edge of an airfoil is the perpendicular distance between the point where the lift force is considered to act and the trailing edge of the airfoil. In aerodynamics, this moment arm is a fundamental parameter that influences the generation of moments (torques) around a specific point on the airfoil.Â
- is the moment arm from the lift to the trailing edge.
- is the chord length of the airfoil.
- is the angle of attack, which is the angle between the chord line of the airfoil and the direction of the oncoming airflow.