What is the function of the throttle in an aircraft?

The throttle in an aircraft serves a crucial role in controlling engine power output, which directly affects both the speed and altitude of the aircraft. When the throttle is increased, more fuel and air are sent to the engine, resulting in greater engine power. This enhanced power allows the aircraft to climb or maintain altitude more effectively. Conversely, reducing the throttle decreases engine power, which can lead to descent or a decrease in airspeed.

By managing how much power the engine produces, the throttle directly influences the aircraft's performance in the air, making it integral to various phases of flight, including takeoff, climb, cruise, and descent. The throttle does not solely manage fuel flow, as that is just one of its contributing functions. It also does not control airspeed independently; rather, it affects airspeed through its impact on engine power output. Similarly, the throttle is not related to cabin pressure management, a function typically handled by other systems within the aircraft.