What is the purpose of spring tabs or servo tabs in aircraft?

The purpose of spring tabs or servo tabs in aircraft is primarily to assist the pilot in moving control surfaces. These tabs function as small auxiliary surfaces that are connected to primary control surfaces such as ailerons, rudders, or elevators. When the pilot applies force to the control stick or yoke, the spring or servo tabs help to reduce the amount of control force required to move these larger surfaces. This is particularly beneficial in larger aircraft where control surfaces can be heavy and require significant effort to manipulate. By using spring or servo tabs, the pilot can achieve greater responsiveness and ease of control, enhancing overall flight safety and handling characteristics.

Other options, while relevant to aircraft design and functionality, do not accurately describe the specific role of spring tabs or servo tabs. For instance, while increasing drag or stabilizing an aircraft are important considerations in aircraft performance, these are not the primary functions of spring tabs. Similarly, the reduction of weight is an important goal in aircraft design but does not directly relate to the functionality of spring tabs as control assistance mechanisms.