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stall angle
- Sinônimos - Inglês
- stalling angle
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Circular 191: aircraft accident digest n.29 1982. Montreal, 1985. (Cir. 191-AN/116)
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual of aircraft accident and incident investigation. Part III: investigation. 1st ed. Montreal, 2011. (Doc. 9756)
- Contexto
- Most air carrier aircraft are equipped with a stickshaker or some other type of alarm to alert the pilot that his aircraft is approaching the stall angle of attack. In the B-737, the stickshaker is activated when a fuselage-mounted vane aligns itself with the airflow and reaches a preset angle of attack which is less than the stall angle of attack.
- The formation of structural ice on lifting surfaces can adversely affect aircraft stability, the most dramatic effect of which is the stall of the horizontal tail. Lift generated by the horizontal tail (which is in the downward direction) balances the weight of the airplane whose centre of gravity is located forward of the wing’s centre of lift. If the horizontal tail’s angle of attack exceeds its stall angle of attack, the horizontal tail will stall, the balance is upset and nose will pitch down. If the nose down pitching is not arrested, the airplane’s attitude can quickly reach vertical. If the tail stall occurs while the airplane is making its approach to landing, collision with the ground at an extremely nose-low attitude and at a speed well above stall speed is likely.
- Français
- angle de décrochage