What is the advantage of using stabilators instead of a conventional tailplane?

Using stabilators offers distinct advantages, especially when considering control surfaces in aircraft design. A stabilator is a horizontal tail surface that combines the functions of both the stabilizer and the elevator into a single unit. This design allows for more effective control of the aircraft's pitch attitude.

The ability to combine the stabilizer and elevator into one surface results in enhanced control authority, particularly during high-speed flight and in situations where quick pitch changes are necessary. This integration improves the responsiveness of the aircraft to pilot input, leading to better handling qualities and increased stability.

Additionally, the nature of a stabilator can contribute to reduced drag compared to traditional configurations, as it provides lift and control simultaneously. This can improve overall aerodynamic efficiency. However, the primary advantage lies in the enhanced control capabilities that are provided, making the design particularly popular in modern aircraft.

Other options mentioned, such as increased aerodynamic drag, reduced weight, or ease of maintenance, do not capture the key benefit associated with this design approach. The combination of the stabilizer and elevator for enhanced control is what fundamentally distinguishes stabilators and makes them beneficial in aircraft design.