AP.IV.E.K2

From the FAA library

• Pilot's Handbook of Aeronautical Knowledgep. 5-34
  Chapter 5: Aerodynamics of Flight › Load Factors › Load Factors and Stalling Speeds

  Load Factors and Stalling Speeds Any aircraft, within the limits of its structure, may be stalled at any airspeed. When a sufficiently high AOA is imposed, the smooth flow of air over an airfoil breaks up and separates, producing ... abrupt change of flight characteristics and a sudden loss of lift, which results in a stall. A study of this effect has revealed that an aircraft’s stalling speed increases in proportion to the square root of the load factor…

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

  stated above, it does not completely stop producing lift. In most straight-wing aircraft, the wing is designed to stall the wing root first. The wing root reaches its critical AOA first making the stall progress outward toward the wingtip ... having the wing root stall first, aileron effectiveness is maintained at the wingtips, maintaining controllability of the aircraft. Various design methods are used to achieve the stalling of the wing root first. In one design, the wing is “twisted…

• Pilot's Handbook of Aeronautical Knowledgep. 7-23
  Chapter 7: Aircraft Systems › Turbine Engines › Compressor Stalls

  Compressor Stalls Compressor blades are small airfoils and are subject to the same aerodynamic principles that apply to any airfoil. A compressor blade has an AOA that is a result of inlet air velocity and the compressor’s rotational velocity ... combine to form a vector, which defines the airfoil’s actual AOA to the approaching inlet air. A compressor stall is an imbalance between the two vector quantities, inlet velocity, and compressor rotational speed. Compressor stalls occur when the compressor…

• Pilot's Handbook of Aeronautical Knowledgep. 5-26
  Chapter 5: Aerodynamics of Flight › Angle of Attack Indicators

  those accidents, half involve stall/spin scenarios. Technology such as AOA indicators can have a tremendous impact on reversing this trend and are increasingly affordable for general aviation airplanes. [Figure 5-41] The purpose of an AOA indicator is to give ... pilot better situation awareness pertaining to the aerodynamic health of the airfoil. This can also be referred to as stall margin awareness. More simply explained, it is the margin that exists between the current AOA that the airfoil is operating…

• Pilot's Handbook of Aeronautical Knowledgep. 5-36
  Chapter 5: Aerodynamics of Flight › Load Factors › Stalls

  Stalls The normal stall entered from straight-and-level flight, or an unaccelerated straight climb, does not produce added load factors beyond the 1 G of straight-and-level flight. As the stall occurs, however, this load factor ... load on the wings and raise the pilot from the seat) may be produced. During the pull up following stall recovery, significant load factors are sometimes induced. These may be further increased inadvertently during excessive diving (and consequently high airspeed…

• Pilot's Handbook of Aeronautical Knowledgep. 5-48
  Chapter 5: Aerodynamics of Flight › Boundary Layer Separation › Sweepback

  words, the use of sweepback “softens” the force divergence. A disadvantage of swept wings is that they tend to stall at the wingtips rather than at the wing roots. [Figure 5-69] This is because the boundary layer tends ... tips of a swept wing are on the aft part of the wing (behind the CL), a wingtip stall causes the CL to move forward on the wing, forcing the nose to rise further. The tendency for tip stall…