| Servo Tab |
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| aircraft controls | |
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Servo tabs are small flaps installed on aircraft control surfaces to assist the movement of the control surface. Servo tabs move in the opposite direction of the control surface. The tab has a leverage advantage, being located closer to the Trailing Edge of the surface and thus can lever the control surface in the opposite direction. This has the effect of reducing the control force required by the pilot to move the controls. An anti-servo tab works in the opposite way. It deploys in the same direction as the control surface, making the movement of the control surface more difficult and requires more force applied to the controls by the pilot. This may seem counter-productive, but it is commonly used on aircraft where the controls are too light or the aircraft requires additional Stability in that axis of movement. The anti-servo tab serves to artificially increase stability and also make the controls heavier in feel to the pilot. |
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