08 Angle Of Attack

Question 1

What systems require an input of the AOA?

Answer 1

• Stall warning devices (stick shaker and pusher)
• Flight Envelope
• Air Data Computer (ADC)

Question 2

Describe the devices which can be used to sense the Angle of Attack

Answer 2

• Flapper Switch: uses the stagnation point movement
• Vane: rotates into the RAF
• Probe: compares the pressure in two pitot tubes
• Null Seeking Probe: Rotates to have equal pressure between two pitot tubes