Which of the following airfoils is primarily responsible for lift during flight?

• A. Tails
• B. Spars
• C. Wings
• D. Ribs

Answer: (C)

The wings of an aircraft are primarily responsible for generating lift during flight. Wings are designed with an airfoil shape, which allows them to interact with the airflow in a way that produces lift. The airfoil's shape creates a difference in air pressure above and below the wing, resulting in an upward force that lifts the aircraft off the ground.

During flight, as the aircraft moves forward, air flows over and under the wings. The curvature of the upper surface of the wing causes the air to travel faster over the top, leading to lower pressure above the wing compared to the higher pressure underneath. This pressure differential is what generates lift.

In contrast, while the tails, spars, and ribs of an aircraft play important roles in the overall structural integrity and stability of the aircraft, they do not primarily generate lift. The tail, or empennage, helps maintain stability and control during flight, while spars are internal structural components that support the wings and fuselage. Ribs provide shape and structural support to the wings but do not contribute directly to lift generation. Thus, while all these components are critical to the aircraft's performance, the wings are the key elements responsible for producing lift.