HI.VII.C.K8

From the FAA library

• Helicopter Flying Handbookp. 2-9
  Chapter 2: Aerodynamics of Flight › Airflow and Reactions in the Rotor Disk › Rotational Relative Wind (Tip-Path Plane)

  Airflow and Reactions in the Rotor Disk Relative Wind Knowledge of relative wind is essential for an understanding of aerodynamics and its practical flight application for the pilot. Relative wind is airflow relative to an airfoil. Movement of an airfoil ... through the air creates relative wind. Relative wind moves in a direction parallel to but opposite of the movement of the airfoil. [Figure 2-15] There are two parts to wind passing a rotor blade: • Horizontal part—caused…

• Helicopter Flying Handbookp. 2-10
  Chapter 2: Aerodynamics of Flight › Airflow and Reactions in the Rotor Disk › Resultant Relative Wind

  highest. As blade speed decreases nearer the center of the disk, downward velocity is less. Figure 2-19. Rotational relative wind. Resultant Relative Wind The resultant relative wind at a hover is rotational relative wind modified by induced flow. This ... inclined downward at some angle and opposite the effective flightpath of the airfoil, rather than the physical flightpath (rotational relative wind). The resultant relative wind also serves as the reference plane for development of lift, drag, and total aerodynamic force…

• Aviation Instructor's Handbookp. 3-34
  Chapter 3: The Learning Process › Errors › Learning from Error

  Error Recovery Given that the occasional error is inevitable, it is a worthwhile exercise to practice recovering from commonly made errors, or those that pose serious consequences. All flight learners need to learn and practice a lost procedure to ensure ... which they have lost their way. It is useful to devote the same sort of preparation to other common learner errors. Learning from Error Error can be a valuable learning resource. Learners naturally make errors, which instructors can utilize…

• Pilot's Handbook of Aeronautical Knowledgep. 12-13
  Chapter 12: Weather Theory › Atmospheric Stability › Temperature/Dew Point Relationship

  Relative Humidity Humidity refers to the amount of water vapor present in the atmosphere at a given time. Relative humidity is the actual amount of moisture in the air compared to the total amount of moisture the air could hold ... that temperature. For example, if the current relative humidity is 65 percent, the air is holding 65 percent of the total amount of moisture that it is capable of holding at that temperature and pressure. While much of the western…

• Aeronautical Information Manualp. 7-2-1
  Chapter 7. Safety of Flight › Section 2. Barometric Altimeter Errors and Setting Procedures › 7-2-2. Barometric Pressure Altimeter Errors

  Section 2. Barometric Altimeter Errors and Setting Procedures Procedures 7-2-1. General a. Aircraft altimeters are subject to the following errors and weather factors: 1. Instrument error. 2. Position error from aircraft static pressure systems. 3. Nonstandard atmospheric pressure ... Nonstandard temperatures. b. The standard altimeter 29.92 inches Mercury (“Hg.) setting at the higher altitudes eliminates station barometer errors, some altimeter instrument errors, and errors caused by altimeter settings derived from different geographical sources. 7-2-2. Barometric Pressure Altimeter…

• Risk Management Handbookp. 6-1
  Chapter 6: Threat and Error Management › Causes of Errors › Insufficient Training & Experience

  Chapter 6: Threat and Error Management Introduction Threats What is an Error? Causes of Errors Insufficient Training & Experience Introduction Pilots use risk management as described in earlier chapters to analyze the likelihood and potential severity of an incident or accident ... encounter unforeseen hazards or threats. In addition, a pilot may respond inappropriately to a given condition, thus making an error. This chapter provides strategies pilots may use once flight begins. Threats Threats have the following characteristics: • Threats occur outside…