In what way does a stabilator differ from a traditional elevator?

A stabilator differs from a traditional elevator primarily because it is a single-piece horizontal tail surface that combines the functions of both the stabilizer and the elevator. In a conventional elevator system, the horizontal stabilizer is a fixed structure, and the elevator is a separate movable surface attached to the rear of the stabilizer. The stabilator, however, can pivot as a whole, which enhances aerodynamic efficiency and responsiveness.

This design allows for more effective pitch control since the entire surface can adjust its angle to manage changes in airflow, thereby providing improved stability and control at various speeds and flight conditions. Such a mechanism can be particularly beneficial in high-speed flight, where traditional elevators might experience limitations.

The other options do not accurately describe the fundamental characteristics of a stabilator. A stabilator is not simply hinge-controlled; it is more about the pivoting motion of the whole surface. It does not move only in response to airspeed since it operates based on pilot input through control surfaces. Furthermore, a stabilator does not function solely for yaw control; its primary purpose is to adjust pitch, although changes in pitch can incidentally affect yaw as well.