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What principles affect aerofoils to produce lift, and why are there differing opinions on which principle is correct?
hye.kwon
Mind Map by hye.kwon, updated more than 1 year ago
hye.kwon
Created by hye.kwon over 9 years ago
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le mindmap~
  1. What is Lift?
    1. Lift is the force that holds an airplane in the air
      1. A mechanical force
        1. One of the four forces affecting things that fly
        2. Where are Aerofoils present?
          1. Helicopter blades
            1. Turbo machinery
              1. Wings
                1. Space shuttles
                  1. Passenger jets
                    1. Jumbo jets
                    2. Military aircraft
                      1. Fighter jets
                        1. Cargo aircraft
                      2. Recreational aircraft
                        1. Hang gliders
                          1. Gliders
                          2. Hydrofoils
                            1. Sails
                              1. Racing cars
                                1. Wind turbines
                                  1. Nature
                                    1. Wings
                                      1. Birds
                                        1. Insects
                                        2. Plants
                                          1. Seeds
                                          2. Sea animals
                                            1. Flippers
                                              1. Sessile organisms
                                                1. Bodies of fish
                                            2. How is Lift generated?
                                              1. A fluid flowing past the surface of a body, exerting force
                                                1. When a moving flow of gas turns an object
                                                  1. Air flow is deflected down, and the wing is pushed up
                                                    1. Low pressure on the upper surface of a wing and high pressure on the bottom
                                                      1. Air speeds up when the pressure is lower and vice versa
                                                        1. The pressure and speed difference results in lift
                                                    2. Forces of Flight
                                                      1. Lift
                                                        1. Drag
                                                          1. Weight
                                                            1. Thrust
                                                            2. What are some Principles or Theories that explain Lift
                                                              1. Coanda effect
                                                                1. Bernoulli's principle
                                                                  1. Newton's 3rd law
                                                                    1. Equal transit theory
                                                                      1. Action - Reaction theory
                                                                        1. Kutta-Joukowski theorem
                                                                          1. Venturi theory
                                                                          2. What is an Aerofoil?
                                                                            1. Cross section of a wing or blade
                                                                              1. A body that produces lift when moving through a fluid
                                                                                1. Physical attributes
                                                                                  1. Rounded leading edge
                                                                                    1. Forward edge
                                                                                    2. Sharp trailing edge
                                                                                      1. Aft edge
                                                                                      2. Camber line
                                                                                        1. Denotes the amount of curvature of the wing
                                                                                        2. Point of maximum thickness
                                                                                          1. Thickest part of the aerofoil
                                                                                            1. Expressed as a percentage of the chord
                                                                                          2. Chord
                                                                                            1. Imaginary straight line connecting the leading and trailing edge
                                                                                            2. Angle of attack
                                                                                              1. Angle between the aerofoil and oncoming air
                                                                                                1. Larger angles result in more lift
                                                                                                  1. Exceeding a critical angle of attack (approx 15 degrees) causes stalling
                                                                                                    1. Stall is a sudden reduction of lift
                                                                                              2. Symmetric aerofoils
                                                                                                1. Aerofoils with no camber
                                                                                              3. Also called an Airfoil
                                                                                              4. Capabilities
                                                                                                1. Sources

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