What is an airfoil?

What is an airfoil?

• A. A tail rotor component
• B. An aerodynamic surface that generates lift and helps control the helicopter's altitude and direction
• C. A landing gear component
• D. A type of engine

Answer: (B)

An airfoil is a shaped surface designed to generate lift as air flows around it. In helicopters, the rotor blades are airfoils, and as they spin through the air, their curved top and flatter bottom create a pressure difference that produces lift. This lift supports the helicopter’s weight and, when the blade pitch or rotor tilt is altered, helps control altitude and direction. So an airfoil refers to the aerodynamic shape responsible for lifting the aircraft, not mechanical parts like a tail rotor, landing gear, or an engine.

An airfoil is a shaped surface designed to generate lift as air flows around it. In helicopters, the rotor blades are airfoils, and as they spin through the air, their curved top and flatter bottom create a pressure difference that produces lift. This lift supports the helicopter’s weight and, when the blade pitch or rotor tilt is altered, helps control altitude and direction. So an airfoil refers to the aerodynamic shape responsible for lifting the aircraft, not mechanical parts like a tail rotor, landing gear, or an engine.