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What principles affect aerofoils to produce lift, and why are there differing opinions on which principle is correct?
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Mind Map by
, updated more than 1 year ago
over 8 years ago
What is Lift?
Lift is the force that holds an airplane in the air
A mechanical force
One of the four forces affecting things that fly
Where are Aerofoils present?
Bodies of fish
How is Lift generated?
A fluid flowing past the surface of a body, exerting force
When a moving flow of gas turns an object
Air flow is deflected down, and the wing is pushed up
Low pressure on the upper surface of a wing and high pressure on the bottom
Air speeds up when the pressure is lower and vice versa
The pressure and speed difference results in lift
Forces of Flight
What are some Principles or Theories that explain Lift
Newton's 3rd law
Equal transit theory
Action - Reaction theory
What is an Aerofoil?
Cross section of a wing or blade
A body that produces lift when moving through a fluid
Rounded leading edge
Sharp trailing edge
Denotes the amount of curvature of the wing
Point of maximum thickness
Thickest part of the aerofoil
Expressed as a percentage of the chord
Imaginary straight line connecting the leading and trailing edge
Angle of attack
Angle between the aerofoil and oncoming air
Larger angles result in more lift
Exceeding a critical angle of attack (approx 15 degrees) causes stalling
Stall is a sudden reduction of lift
Aerofoils with no camber
Also called an Airfoil
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