HI.XI.G.S5

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…

• 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…

• 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…

• Helicopter Flying Handbookp. 11-7
  Chapter 11: Helicopter Emergencies and Hazards › Autorotation › Common Errors

  Common Errors The following common errors should be prevented: 1. Entering the maneuver at an improper altitude or airspeed. 2. Entering the maneuver without a level attitude (or not in coordinated flight). 3. Entering the maneuver and not correcting from ... descent on entry. 5. Improper use of anti-torque on entry. 6. Failure to establish the appropriate crosswind correction, allowing the aircraft to drift. Failure to maintain coordinated flight through the tum. Failure to maintain rotor rpm within…

• Helicopter Flying Handbookp. 11-6
  Chapter 11: Helicopter Emergencies and Hazards › Common Errors › Autorotation with Turns

  Upon reaching the course line, set the appropriate crosswind correction. If the collective pitch was increased to control the rpm, it may need to be lowered on rollout to prevent decay in rotor rpm. This maneuver should be aborted ... uncoordinated flight condition (trim-ball not centered) results in an increased sink rate, which may be unrecoverable if not corrected…

• Instrument Flying Handbookp. 7-24
  Chapter 7, Section I: Airplane Basic Flight Maneuvers › Turns › Steep Turns

  During training in steep turns, as in any other maneuver, attend to the most important tasks first. Keep the pitch attitude relatively constant, and more time can be devoted to cross-check and instrument interpretation. During recovery from steep turns ... released and power decreased. The common errors associated with steep turns are the same as those discussed later in this section. Remember, errors are more exaggerated, more difficult to correct, and more difficult to analyze unless rates of entry…