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The wing twist angle is introduced to prevent stall from occurring at the wing tip before than the wing root. Usually wings are 'washout' twisted, resulting in a decreasing angle of attack starting from the root and towards the tip. Precisely, the twist angle is the angle between the zero-lift line of the profile in the current section and the zero-lift line of the root profile. As the twist angle increases along the span, the lower is the local angle of attack and the lower is the lift generated. By this we prevent the wing tip from generating as much lift as the wing root, which may cause the stall to occur at the worst place we'd like it to occur, the ailerons. By washout twist, we obtain to make stall occur at the wing root, without lost of ailerons control.
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∙ 15y ago
Changing the wing twist angle can affect the aerodynamic performance of the aircraft. Increasing the twist angle can improve stall characteristics by ensuring that the wing root stalls before the tip, providing better lift distribution. However, excessive twist can increase induced drag and reduce overall efficiency. Conversely, decreasing the twist angle can improve cruise efficiency but may lead to a less forgiving stall behavior.
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Why is there a twist in a propeller blade?
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What will be the pressure below the surface of the wing of the plane flying in the air?
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