What is one advantage of a constant speed propeller over a fixed pitch propeller?

A constant speed propeller is designed to adjust its blade pitch automatically to maintain an optimal RPM throughout various flight phases, such as takeoff, climb, cruise, and descent. This ability to change the blade pitch in response to power demands allows the engine to operate more efficiently, maximizing performance and fuel efficiency. During takeoff, for example, the propeller can set to a lower pitch to provide maximum thrust, while in cruise, a higher pitch setting can reduce drag and optimize speed.

In contrast, a fixed pitch propeller is set to a single pitch angle that does not change during flight, which can lead to reduced efficiency during different phases of flight. While fixed-pitch propellers can be simpler and lighter, they do not adapt to changing operational needs in the way that constant speed propellers do, making the latter more versatile and efficient across a broader range of flight conditions.