Dissymmetry of Lift (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Dissymmetry of lift in rotorcraft aerodynamics refers to an uneven amount of lift on opposite sides of the rotor disc. It is a phenomenon that affects single-rotor helicopters in lateral flight, whether the direction of flight be forwards, sideways or in reverse. The dissymmetry is caused by differences in relative airspeed between the advancing blade and the retreating blade. The relative airflow parallel with the plane of the rotor disc determines the average relative speed of air passing over the rotor blades.