altering systems

Question 1

what are the stall warning devices

Answer 1

mechanical stall warner
slot stall warner
pre-stall buffet

Question 2

how does the mechanical stall warner work

Answer 2

airflow lifts protruding flap

Question 3

how does the slot stall warner work

Answer 3

air sucked out of it when critical AoA reached, produces sound

Question 4

when does pre-stall buffet happen

Answer 4

when airflow starts to separate