Private Pilot License (PPL) Aerodynamics Practice Exam

What is one of the main functions of wing flaps during approach and landing?

1. They decrease the aircraft's drag

2. They increase the angle of descent without increasing airspeed

3. They stabilize the aircraft in turbulence

4. They increase the stall speed

The correct answer is: They increase the angle of descent without increasing airspeed

Wing flaps play a crucial role during the approach and landing phases of flight, and one of their primary functions is to increase the angle of descent without significantly increasing airspeed. When extended, flaps alter the wing's camber and surface area, which generates more lift at lower speeds. This allows pilots to maintain controlled flight while descending steeply toward the runway, achieving a more manageable descent profile. By increasing lift at reduced speeds, flaps also contribute to better control during critical phases of flight, especially during landing where pilots may desire a steeper descent to align with the runway approach. This capability allows pilots to land safely in shorter distances and helps manage the aircraft's approach more effectively, creating a versatile tool for handling various landing scenarios. While options like decreasing drag or stabilizing the aircraft are relevant in certain contexts, they do not encapsulate the primary function of flaps during this specific phase of flight. Instead, the design and purpose of flaps are primarily centered around enhancing lift and control at lower speeds, which is fundamental to executing a safe touchdown.