The control surfaces include an all flying tail fitted with an anti-servo tab and full-span ailerons of very short chord that act as faired to reduce drag.
22.
On many aircraft, the tailplane assembly consists of a fixed surface fitted with a hinged aft all-moving stabilizers, anti-servo tabs are used to increase these forces.
23.
The Lockheed design office was justifiably upset, but their design engineers could only conclude that servo tabs were " not " the solution for loss of control in a dive.
24.
The new model incorporated changes to the aircraft's control surfaces, including enlarged and balanced ailerons, the addition of a rudder anti-servo tab, and a stabilator bobweight.
25.
The pilot moves the wheel which moves the servo tab and then the servo tab, using its mechanical advantage, moves the elevator or aileron, which is otherwise free-floating.
26.
The pilot moves the wheel which moves the servo tab and then the servo tab, using its mechanical advantage, moves the elevator or aileron, which is otherwise free-floating.
27.
In the case of some large aircraft the servo tab is the only control that is connected to the pilot's stick or wheel, as in the Bristol Britannia and its Canadian derivatives.
28.
An overly flexible, involuntarily twisting wing can cause involuntary rolling, but even worse, it can convert attempts at correction, either from wing warping or ailerons, into a counteracting " servo tab " effect.
29.
The first solution tried was the fitting of spring-loaded servo tabs on the elevator trailing edge designed to aid the pilot when control yoke forces rose over, as would be expected in a high-speed dive.
30.
To provide this resistance, stabilators on small aircraft contain an anti-servo tab ( usually acting also as a trim tab ) that deflects in the same direction as the stabilator, thus providing an aerodynamic force resisting the pilot's input.
