Which event occurs at approximately 0.8 AOA?

Which event occurs at approximately 0.8 AOA?

• A. Shaker activation
• B. Pusher engagement
• C. Spoiler deployment
• D. Flap extension

Answer: (A)

As a ship’s angle of attack climbs toward the stall point, the flight control systems use a tactile warning to alert you early. The shaker is the mechanism that vibrates the control column when the angle of attack reaches a preset threshold near stall. In this scenario, that threshold is about 0.8 AOA, so the shaker activates to give you a heads-up before the stall develops. This is an anticipatory warning rather than a response to flap, spoiler, or pusher actions. Spoilers and flaps respond to different inputs: spoilers deploy as lift devices or speed brakes in specific configurations or during landing, and flap extension occurs when you select a flap setting to change lift characteristics. The pusher engages as part of stall protection logic after the stall warning if the aircraft continues to stall, not at the initial 0.8 AOA warning.

As a ship’s angle of attack climbs toward the stall point, the flight control systems use a tactile warning to alert you early. The shaker is the mechanism that vibrates the control column when the angle of attack reaches a preset threshold near stall. In this scenario, that threshold is about 0.8 AOA, so the shaker activates to give you a heads-up before the stall develops. This is an anticipatory warning rather than a response to flap, spoiler, or pusher actions.

Spoilers and flaps respond to different inputs: spoilers deploy as lift devices or speed brakes in specific configurations or during landing, and flap extension occurs when you select a flap setting to change lift characteristics. The pusher engages as part of stall protection logic after the stall warning if the aircraft continues to stall, not at the initial 0.8 AOA warning.