FH.IX.C.S2

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…

• Pilot's Handbook of Aeronautical Knowledgep. 8-26
  Chapter 8: Flight Instruments › Compass Systems › Magnetic Compass Induced Errors

  Figure 8-36. Northerly and southerly turning errors. Southerly Turning Errors When turning in a southerly direction, the forces are such that the compass float assembly lags rather than leads. The result is a false southerly turn indication. The compass ... float assembly, should be allowed to pass the desired heading prior to stopping the turn. As with the northerly error, this error is amplified with the proximity to either magnetic pole. To correct this lagging error, the aircraft should…

• 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. 9-15
  Chapter 9: Basic Flight Maneuvers › Common Errors › S-Turns

  Common Errors 1. Faulty entry technique. 2. Poor planning, orientation, and/or division of attention. 3. Uncoordinated flight control application. 4. Improper correction for wind drift. 5. Failure to maintain selected altitude and airspeed. 6. Selection of a ground reference with ... traffic pattern or square field). S-Turns Another training maneuver to use is the S-turn, which helps correct for wind drift in turns. This maneuver requires turns to the left and right. Technique Figure 9-16. S-turns across…

• Aviation Instructor's Handbookp. 9-12
  Chapter 9: Techniques of Flight Instruction › Assessment of Piloting Ability › Correction of Learner Errors

  Correction of Learner Errors Correction of learner errors does not include the practice of taking over from learners immediately when a mistake is made. Safety permitting, it is frequently better to let learners progress part of the way into ... aircraft. It is difficult for learners to learn a maneuver properly if they seldom have the opportunity to correct an error. On the other hand, learners may perform a procedure or maneuver correctly and not fully understand the principles…

• Helicopter Flying Handbookp. 11-5
  Chapter 11: Helicopter Emergencies and Hazards › Autorotation › Common Errors

  landing carriage, slowing the helicopter; however, this is dependent on the condition of the landing surface. One common error is the holding of the helicopter off the surface, versus cushioning it onto the surface during an autorotation. Holding the helicopter ... surface for a controlled, smooth landing instead of allowing the helicopter to drop the last few inches. Common Errors 1. Not understanding the importance of an immediate entry into autorotation upon powerplant or driveline failure. 2. Failing to use sufficient…