What are the four aerodynamic forces?

By Aerodynamics

The four aerodynamic forces are thrust, drag, lift, and weight.

How is lift created?

By Aerodynamics

Lift is created through the combination of Bernoulli’s principle and Newton’s 3rd law.

What is the lift formula or equation?

By Aerodynamics

The lift formula or equation is CL ½ p V2 S.

What is induced flow?

By Aerodynamics

Induced flow is the downward vertical movement of air through the rotor system due to the production of lift, often referred to as downwash.

What is relative wind?

By Aerodynamics

Relative wind is the angle of airflow as it impacts an airfoil.

What is rotational relative wind?

By Aerodynamics

Rotational relative wind is the relative wind produced by the rotation of the rotor blades.

What is resultant relative wind?

By Aerodynamics

Resultant relative wind is angle airflow at the rotor blades considering rotational relative wind and induced flow.

What is dissymmetry of lift?

By Aerodynamics

Dissymmetry of lift is the unequal rotor thrust, or lift, produced by the rotor disc due to forward flight or wind.

What is flapping?

By Aerodynamics

Flapping is the vertical movement of a blade up or down to increase or decrease lift in order to compensate for dissymmetry of lift.

What is coning?

By Aerodynamics

Coning is an upward sweeping angle of the rotor blades as a result of lift and centrifugal force.