Which of the following are the two types of drag?

The two types of drag relevant to aircraft performance are parasitic drag and induced drag. Parasitic drag is made up of form drag and skin friction drag, which arise from the aircraft's shape and surface texture and increase with airspeed. It becomes significant at higher speeds and affects the overall aerodynamic efficiency of the aircraft.

Induced drag, on the other hand, is a product of lift generation and is particularly relevant at slower speeds and higher angles of attack. This type of drag is associated with the creation of lift and increases as the angle of attack increases. In flight, these two types of drag interact, and understanding both is essential for managing flight performance and efficiency. This knowledge is critical for pilots, especially when considering takeoff, climbing, cruising, and descending phases of flight, where drag plays a significant role in fuel consumption and overall aircraft handling.