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stall
Definição1
An aerodynamic condition in which the angle of attack, the angle at which the relative wind strikes the airfoil, becomes so steep the air can no longer flow smoothly over the airfoil. When an airfoil stalls, it stops producing lift.
Fonte1
CRANE, Dale (ed.). Dictionary of aeronautical terms. 2nd ed. Renton: ASA, 1991.
Fonte2
ARAÚJO, João Richard Barcelos. Inglês técnico: técnicos em manutenção de aeronaves. [S.l]: [s.n.], [200-]. 100 p.
Fonte3
FAA FLIGHT SAFETY BRIEFING. Washington, DC: FAA, mai.-jun. 2015.
Contexto
Central to the problem of the prevention of unintentional stalls is a general misunderstanding of how and why an aircraft will stall. Too often, we hear discussed the aircraft’s stall speed; in fact, the aircraft stalls if, and only if, the wing exceeds the critical angle of attack. That this will occur at a particular speed is only true given a closely-defined set of conditions.
Subárea1
Piloting
Related Term
approach to stall
artificial stall warning
blade stall
natural stall warning
power stall
stall recovery
stall warning
tail slide
Português
estol
Imagem

 A Schweizer SGS 1-36 being used for deep stall research by NASA over the Mojave Desert in 1983.

A Schweizer SGS 1-36 being used for deep stall research by NASA over the Mojave Desert in 1983.

Fonte: http://en.wikipedia.org/wiki/File:Schweizer_1-36_NASA.jpg

 The deep stall affects aircraft with a T-tail configuration.

The deep stall affects aircraft with a T-tail configuration.

Fonte: https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Deep_stall.svg/300px-Deep_stall.svg.png