Abstract: An improved geared tab configuration for a moveable airfoil, such as an elevator of an aircraft, is provided which comprises a tab pivotally connected to the airfoil, and linkage connecting the airfoil to the tab for simultaneous opposing pivotal movement of the tab relative to the airfoil to a maximum tab deflection at a determinable intermediate upward airfoil deflection beyond which the relative tab deflection reverses and fairs to the airfoil at a determinable maximum upward airfoil deflection.

Abstract: A system for reliably limiting the maximum positions to which the power control lever of an aircraft engine may be set in the thrust reversal mode corresponding to whether the aircraft is in the air or on the ground. A plurality of cable drums, one for each of the power control lines extending between the cockpit and the engines of a multi-engine aircraft, is associated with an adjustable stop mechanism which provides a first stop position for the cable drum when the aircraft is in the air with landing gear up and a second stop position permitting increased reverse thrust when the aircraft is on the ground. The system is coordinated with the landing gear position sensing system of the aircraft and works in conjunction with presently installed thrust reversing systems.