IL.II.D.K8

From the FAA library

• Pilot's Handbook of Aeronautical Knowledgep. 4-5
  Chapter 4: Principles of Flight › Theories in the Production of Lift › Newton’s Basic Laws of Motion

  Theories in the Production of Lift In order to achieve flight in a machine that is heavier than air, there are several obstacles we must overcome. One of those obstacles, discussed previously, is the resistance to movement called drag ... overcome in aviation, however, is the force of gravity. A wing moving through air generates the force called lift, also previously discussed. Lift from the wing that is greater than the force of gravity, directed opposite to the direction…

• Pilot's Handbook of Aeronautical Knowledgep. 5-23
  Chapter 5: Aerodynamics of Flight › Aerodynamic Forces in Flight Maneuvers › Forces in Climbs

  execute a standard-rate turn (3° per second). At this angle of bank, only about 79 percent of the lift of the aircraft comprises the vertical component of the lift. This causes a loss of altitude unless ... increased sufficiently to compensate for the loss of vertical lift. Forces in Climbs For all practical purposes, the wing’s lift in a steady state normal climb is the same as it is in a steady level flight…

• Pilot's Handbook of Aeronautical Knowledgep. 4-7
  Chapter 4: Principles of Flight › Airfoil Design

  wing is constructed in such form that it causes a lift force greater than the weight of the aircraft, the aircraft will fly. If all the lift required were obtained merely from the deflection of air by the lower surface ... wing, an aircraft would only need a flat wing like a kite. However, the balance of the lift needed to support the aircraft comes from the flow of air above the wing. Herein lies the key to flight…

• Pilot's Handbook of Aeronautical Knowledgep. 5-4
  Chapter 5: Aerodynamics of Flight › Lift

  Conversely, as the aircraft is slowed, the decreasing velocity requires increasing the AOA to maintain lift sufficient to maintain flight. There is, of course, a limit to how far the AOA can be increased, if a stall ... flight (true only if maintaining level flight). Since an airfoil always stalls at the same AOA, if increasing weight, lift must also be increased. The only method of increasing lift is by increasing velocity if the AOA is held constant…

• Pilot's Handbook of Aeronautical Knowledgep. 5-25
  Chapter 5: Aerodynamics of Flight › Stalls

  confuse a reduction in lift with the inability to generate sufficient lift to maintain level flight. The flight path is being manipulated with available thrust in reserve and with the elevator. To descend at the same airspeed as used ... flight path decreases as the angle of descent decreases. Stalls An aircraft stall results from a rapid decrease in lift caused by the separation of airflow from the wing’s surface brought on by exceeding the critical AOA. A stall…

• Aviation Maintenance Technician Handbook - Airframep. 2-23
  Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Forward Flight › Dissymmetry of Lift

  Dissymmetry of Lift Dissymmetry of lift is the differential (unequal) lift between advancing and retreating halves of the rotor disc caused by the different wind flow velocity across each half. This difference in lift would cause the helicopter…