Which definition best describes an airfoil?

Which definition best describes an airfoil?

• A. A wing cross-section designed to generate lift as air flows over it.
• B. A device used to measure air pressure.
• C. A type of propulsion used in drones.
• D. A structural component used for landing gear.

Answer: (A)

An airfoil is the wing’s cross-section designed to generate lift as air flows over it. The curved top and flatter bottom shape, along with the wing’s tilt to the incoming air, create a pressure difference that produces upward force. This lift results from the air being redirected as the wing moves, with the top surface speeding the flow and reducing pressure while the bottom maintains higher pressure. The other options describe measurement devices, propulsion systems, or landing gear components, which are not what an airfoil is.

An airfoil is the wing’s cross-section designed to generate lift as air flows over it. The curved top and flatter bottom shape, along with the wing’s tilt to the incoming air, create a pressure difference that produces upward force. This lift results from the air being redirected as the wing moves, with the top surface speeding the flow and reducing pressure while the bottom maintains higher pressure. The other options describe measurement devices, propulsion systems, or landing gear components, which are not what an airfoil is.