What are the two types of drag encountered by an unmanned aircraft?

The correct answer identifies the two primary types of drag that an unmanned aircraft experiences: parasitic drag and induced drag.

Parasitic drag is a combination of form drag and skin friction that occurs as the aircraft moves through the air. This type of drag increases with speed and can be influenced by the shape and size of the aircraft, as well as its surface texture. It's important to understand that this drag arises from the aircraft's interaction with the air, and minimizing parasitic drag is critical for enhancing flight efficiency.

Induced drag, on the other hand, is associated with the generation of lift. As an unmanned aircraft generates lift, it creates vortices at the wingtips, which cause a downward slant in the airflow around the wings. This results in an increase in induced drag, which is most significant at lower speeds and higher angles of attack. The relationship between lift and induced drag is vital in determining the aircraft’s performance, especially during takeoff, landing, and flight maneuvers.

Understanding these two types of drag is crucial for optimizing the design and operation of unmanned aircraft to ensure efficiency, performance, and overall flight safety.