Principles of flight_chapter_1
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Lift is generated when air flows over an airfoil such as a wing. The air traveling over the top of the wing must move faster than the air on the bottom, lowering the air pressure above and raising it below, which creates an upward force called lift. Several factors affect the amount of lift generated, including airspeed, angle of attack, air density, and wing shape and area. For an aircraft to fly, the lift must equal or exceed the aircraft's weight to allow it to climb, remain level, or descend depending on the balance between lift and weight.
Principles of flight_chapter_1
- 1. Principles of Flight Chapter 1 – Lift and Weight
- 2. Lift and Weight Issac Newton’s Law: Every Action has an equal and opposite reaction. How can air support an aircraft Air is a substance, so it exerts a force. Blow between two pieces of paper, they get sucked together not blown apart
- 3. Wind Tunnel Tests Air has to travel round the constriction (B) so it travels faster As it is travelling faster the air pressure drops Airspeed up and air pressure increases again at C
- 4. Lift Blowing over a piece of paper lifts it up. The pressure above is lower than below This lifts the paper up. The same applies for an aerofoil or wing.
- 5. Lift As the wing is tilted up at the front it produced downwash This adds to the lift Lift is not distributed evenly The most lift is generated at the most curved part.
- 6. How Lift Varies Several Factors effect Lift: A) Airspeed B) Angle of Attack C) Air Density D) Wing Shape and Area
- 7. Lift and Weight in Balance If Lift is greater that weight the aircraft climbs If Lift is less than Weight the aircraft drops If lift and weight are equal the aircraft stays level