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In generic terms, a stick pusher is known as a stall identification device or stall identification system. [73] A stick shaker is a mechanical device that shakes the pilot's controls to warn of the onset of stall. A stall warning is an electronic or mechanical device that sounds an audible warning as the stall speed is approached. The majority ...
The effect of airfoil geometry on dynamic stall is quite intricate. As is shown in the figure, for a cambered airfoil, the lift stall is delayed and the maximum nose-down pitch moment is significantly reduced. On the other hand, the inception of stall is more abrupt for a sharp leading-edge airfoil. [8] More information is available here. [13]
Example: Volkswagen has registered a patent for an "acoustically decoupled underbody for a motor vehicle.". [4] Another example: Western Digital has registered a patent for an "acoustic vibration decoupler for a disk drive pivot bearing assembly.". [5] Preventing stalls: Whenever a machine undergoes an aerodynamic stall, it will abruptly vibrate.
A stick shaker is a mechanical device designed to rapidly and noisily vibrate the control yoke (the "stick") of an aircraft, warning the flight crew that an imminent aerodynamic stall has been detected. It is typically present on the majority of large civil jet aircraft, as well as most large military planes.
Anti-stall (aeroplane controls), a flight envelope protection system designed to prevent an aircraft for stalling, for example by pushing the nose down; Anti-stall strakes, leading-edge slots or extensions, and stall strips; in fluid and aerodynamics, extensions that generates a vortex on a wing surface to postpone aerodynamic stall
The plane violently oscillated up and down and the "stick pusher” activated, the report said, meaning the onboard computer thought the plane was in danger of an aerodynamic stall.
Also, an aerodynamic force is imposed by the relative vertical positions of the fuselage and the wings, creating a roll-in leverage if the fuselage is above the wings, as in a low wing configuration; or roll-out if below, as in a high-wing configuration. A propeller rotating under power will influence the airflow passing it.
The incident was found to have happened after their EV-97 EuroStar light aircraft experienced an aerodynamic stall after descending too steeply.