le mindmap~

le mindmap~

1. 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

2. Where are Aerofoils present?

   • Helicopter blades
   • Turbo machinery
   • Wings
     • Space shuttles
     • Passenger jets
       • Jumbo jets
     • Military aircraft
       • Fighter jets
       • Cargo aircraft
   • Recreational aircraft
     • Hang gliders
     • Gliders
   • Hydrofoils
   • Sails
   • Racing cars
   • Wind turbines
   • Nature
     • Wings
       • Birds
       • Insects
     • Plants
       • Seeds
     • Sea animals
       • Flippers
       • Sessile organisms
       • Bodies of fish

3. 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

4. Forces of Flight

   • Lift
   • Drag
   • Weight
   • Thrust

5. What are some Principles or Theories that explain Lift

   • Coanda effect
   • Bernoulli's principle
   • Newton's 3rd law
   • Equal transit theory
   • Action - Reaction theory
   • Kutta-Joukowski theorem
   • Venturi theory

6. What is an Aerofoil?

   • Cross section of a wing or blade
   • A body that produces lift when moving through a fluid
   • Physical attributes
     • Rounded leading edge
       • Forward edge
     • Sharp trailing edge
       • Aft edge
     • Camber line
       • Denotes the amount of curvature of the wing
     • Point of maximum thickness
       • Thickest part of the aerofoil
         • Expressed as a percentage of the chord
     • 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
     • Symmetric aerofoils
       • Aerofoils with no camber
   • Also called an Airfoil

7. Capabilities

8. Sources

Bilder und Dateien der Mindmap