FAA Part 107 Drone Practice Test

The correct answer highlights that increased altitude leads to a decrease in lift for unmanned aircraft (UA). This phenomenon occurs mainly due to the reduction in air density as altitude increases. Lift is generated by the movement of air over the wings of an aircraft, and this movement is more effective in denser air. As the altitude increases, the air becomes thinner, which means there are fewer air molecules for the wings to generate lift. Consequently, the ability of the UA to maintain or gain altitude becomes more challenging as it ascends into thinner air. Pilots and operators must be aware of this relationship between altitude and lift, as it can significantly impact the performance, stability, and control of the drone during flight, particularly in high-altitude operations. Understanding this concept is critical for drone operators, as it informs decisions related to flight planning, load capacity, and safety protocols at different altitudes.