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Will any shape work for an airfoil?
No. The air flow path across the top of the airfoil must be longer than the path below.
Why do flow separates over an airfoil?
Because of a change in the angle of attack. When you exceed the critical angle of attack there is not enough wind passing over the airfoil and therefore disrupting lift, the airfoil stalls.
What happens to the airfoil section when it stalls?
The airfoil section remains the same, what happens is the airflow around it becomes separated from the surface. When airspeed becomes very small or the angle of attack of the airfoil is very large, the air flowing over the wing does not flow smoothly and becomes separated, leaving a high pressure regions. This causes immediate loss of lift production.
What is the difference how a helacopter creates lift and an airplane?
They both utilize airflow over an airfoil. The helicopter moves the airfoil (blade) by spinning them, as air passes around the blade it creates lift. An airplane uses thrust from the engines to push the airfoil (wings) forward through the air, the air then flowing over(lower pressure) and under them (higher pressure) produces lift.
The wing covering of the bird?
The covering to the wing consists of skin (the skin is light to help it fly) and feathers that allow air flow, and a layer on top has non air flow feathers to keep the airfoil going.
Did the Wright brothers invention work and why?
Their aircraft? Yep. It was a biplane, and it produced lift by moving air over an airfoil. The effect of an airfoil is described in part by the Bernoulli Principle.
Why wings are shaped like airfoil?
Wings are airfoils. The purpose of the airfoil it to accelerate air over the top of the wing and create an area of low pressure, which produces lift.
What is trailing edge?
A Craft Edge of a Wing. Air however passes over this portion of airfoil
What is a trailing edge?
A Craft Edge of a Wing. Air however passes over this portion of airfoil
What is important about a bird's wing's shape?
A bird's wing is shape like an airfoil. (See the related link Diagram of an airfoil below.) The airfoil is curved more on top, so the air flowing over the top of the airfoil moves faster that the air underneath. This creates more pressure underneath the wing, pushing up and generating a force called lift. This force keeps the birds in the air. (This is also how the wings of an airplane work.)
What is the factor described by Bernoulli's principle that allows airplanes?
Air over the upper surface of the airfoil is induced to move faster than that under its lower surface thus, according to Bernoull's principle, creating a region of lower pressure above the airfoil and a net lift on the airfoil.
How is Bernoulli's principle involved with the flight of a kite?
A kite acts as an airfoil - that's how it flys. (Faster flow over the top = lower pressure, etc).
