Private Pilot Private Exam

What is the function of the flaps in an aircraft?

1. To increase engine power

2. To improve aerodynamic efficiency

3. To enhance lift and control at lower speeds

4. To assist in navigation

The correct answer is: To enhance lift and control at lower speeds

The function of flaps in an aircraft is primarily to enhance lift and control at lower speeds. When flaps are extended, they increase the curvature of the wing and the surface area exposed to the airflow. This modification increases the lift coefficient of the wing, allowing the aircraft to fly safely at slower speeds during critical phases of flight such as takeoff and landing. By being able to fly at lower speeds without stalling, pilots can maintain better control of the aircraft during these phases, which is essential for safe operations in and around airport environments. Additionally, using flaps allows for a steeper angle of descent without increasing speed, which can be beneficial for landing approaches. The other options do not accurately reflect the function of flaps. For instance, flaps do not increase engine power, nor are they primarily designed to improve aerodynamic efficiency overall; they specifically enhance performance in lower speed regimes. While they do have an indirect effect on drag, their main purpose is to increase lift. Lastly, flaps are not involved in navigation, as their purpose is related to the aircraft's aerodynamic characteristics rather than its direction or path during flight.