What is the function of the stabilator on an aircraft?

The stabilator serves as an all-moving tailplane that combines the functions of both a stabilizer and an elevator. Its primary role is to provide pitch control, allowing the pilot to raise or lower the aircraft's nose, which is crucial for both climbing and descending. The stabilator's design enhances the aircraft’s stall characteristics, making it more stable at low speeds, which is essential for safe handling during critical phases of flight such as takeoff and landing.

When the stabilator is used effectively, it can also improve the aircraft's responsiveness to pitch inputs, leading to more precise control. This function is particularly beneficial in high-performance aircraft where the potential for stalling is greater. The other options provided refer to functions that are more associated with different control surfaces or aspects of aircraft performance that the stabilator does not address directly.