# Stall (fluid dynamics)

Reduction in the lift coefficient generated by a foil as angle of attack increases.

- Stall (fluid dynamics)

500 related topics

## Spin (aerodynamics)

In flight dynamics a spin is a special category of stall resulting in autorotation (uncommanded roll) about the aircraft's longitudinal axis and a shallow, rotating, downward path approximately centred on a vertical axis.

## Angle of attack

Angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is moving.

This is also called the "stall angle of attack".

## Flap (aeronautics)

A flap is a high-lift device used to reduce the stalling speed of an aircraft wing at a given weight.

## Camber (aerodynamics)

Asymmetry between the two acting surfaces of an airfoil, with the top surface of a wing commonly being more convex (positive camber).

This minimizes the stalling speed of aircraft using the airfoil.

## Lift coefficient

Dimensionless coefficient that relates the lift generated by a lifting body to the fluid density around the body, the fluid velocity and an associated reference area.

The angle at which maximum lift coefficient occurs is the stall angle of the airfoil, which is approximately 10 to 15 degrees on a typical airfoil.

## T-tail

Empennage configuration in which the tailplane is mounted to the top of the fin.

The aircraft may be prone to stalls at high angles of attack, when airflow over the tailplane and elevators is blanked by the wings The American McDonnell F-101 Voodoo jet fighter suffered from this problem.

## Canard (aeronautics)

Wing configuration in which a small forewing or foreplane is placed forward of the main wing of a fixed-wing aircraft or a weapon.

Rather than use the conventional tailplane configuration found on most aircraft, an aircraft designer may adopt the canard configuration to reduce the main wing loading, to better control the main wing airflow, or to increase the aircraft's maneuverability, especially at high angles of attack or during a stall.

## Atmospheric icing

Atmospheric icing occurs in the atmosphere when water droplets suspended in air freeze on objects they come in contact with.

Icing conditions can be particularly dangerous to aircraft, as the built-up ice changes the aerodynamics of the flight surfaces and airframe, which can increase the risk of a stall and potentially accidents.

## Aircraft flight control system

Aircraft's direction in flight.

It shakes the control column when the aircraft is approaching stall conditions.

## Airfoil

Cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine.

In the region of the ailerons and near a wingtip a symmetric airfoil can be used to increase the range of angles of attack to avoid spin–stall.

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