Stick Shaker/ Pusher

This Safety System Operates Behind the Scenes in Large Aircraft to Prevent the Onset of an Aerodynamic Stall

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Think of the stick shaker/pusher found in transport-category aircraft as a bit of a lazy pilot’s angle of attack indicator. Should the flying pilot become distracted enough that they fail to notice an increasing angle of attack, to a point where the wing is about to cease producing sufficient lift, an airplane equipped with a shaker/pusher system will jump in to try to save the day by reducing the angle of attack. More precisely, the stick shaker acts as a stall-warning device, while the stick pusher’s job is one of stall avoidance.