spring tab

spring tab

A small auxiliary tab, set into the trailing edge of a primary control surface on a high-speed airplane. The control surface is attached to the control horn through a torsion rod. Under normal flight loads, the spring tab remains fixed to the control surface and serves no purpose. But, when the air loads are high and a large amount of force is needed to move the control surface, the torsion rod twists, and the control rod moves the spring tab in a direction opposite to that of the surface on which it is mounted. It then acts as a servo tab and aids the pilot in moving the control surface.

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Part of Speech: noun
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Industry/Domain: Aviation
Category: Aeronautics
Company: Aviation Supplies & Academics
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