As the desired position of a control surface changes (corresponding mainly to different speeds), an adjustable trim tab will allow the operator to reduce the manual force required to maintain that position-to zero, if used correctly. This is done by adjusting the angle of the tab relative to the larger surface.Ĭhanging the setting of a trim tab adjusts the neutral or resting position of a control surface (such as an elevator or rudder). to counteract hydro- or aerodynamic forces and stabilise the boat or aircraft in a particular desired attitude without the need for the operator to constantly apply a control force. Trim tabs are small surfaces connected to the trailing edge of a larger control surface on a boat or aircraft, used to control the trim of the controls, i.e. Aileron and rudder trim tabs are not very common on light training aircraft. Typical trim tabs on ailerons, rudder and elevator.
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February 2023
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