What term describes the rearward, retarding force due to disruption of airflow by the rotor, fuselage, and other protruding objects?

• A. Drag
• B. Profile
• C. Lift
• D. Induced Drag

Answer: (A)

Drag is the rearward force that resists motion through the air. It arises when the airflow is disrupted by the rotor blades, fuselage, and other protruding parts, creating a wake with pressure differences and turbulence that oppose the forward velocity. This total aerodynamic resistance is what the description is referring to. Lift is a vertical force, not a retarding force; induced drag is a component of drag tied to producing lift, and profile drag is the drag due to the shape of moving parts. The statement describes the overall aerodynamic resistance, which is drag.