HI.VII.B.K7

From the FAA library

• Helicopter Flying Handbookp. 2-19
  Chapter 2: Aerodynamics of Flight › Forward Flight › Airflow in Forward Flight

  blade continues to rotate, velocity of the airflow then increases to rotational velocity over the tail. It continues to increase until the blade is back at the 3 o’clock position. The advancing blade in Figure 2-35, position ... moves in the same direction as the helicopter. The velocity of the air meeting this blade equals rotational velocity of the blade plus wind velocity resulting from forward airspeed. The retreating blade (position C) moves in a flow…

• Aeronautical Information Manualp. 7-1-43
  Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-14. Reporting of Cloud Heights

  meter increments for products between 1,200 meters and 2,000 meters. 7-1-14. Reporting of Cloud Heights a. Ceiling, by definition in the CFRs and as used in aviation weather reports and forecasts, is the height above ground ... phenomenon that is reported as “broken,” “overcast,” or “obscuration,” e.g., an aerodrome forecast (TAF) which reads “BKN030” refers to height above ground level. An area forecast which reads “BKN030” indicates that the height is above mean sea level. b. Pilots…

• Helicopter Flying Handbookp. 7-3
  Chapter 7: Helicopter Performance › Performance Charts › Height/Velocity Diagram

  power loss resulting in an uncushioned landing would probably be survivable. As the airspeed increases without an increase in height, there comes a point at which the pilot’s reaction time would be insufficient to react with a flare ... response time of the helicopter flight controls at slow airspeeds and low altitudes. Even small increases in height give the pilot much greater time to react; therefore, the bottom right part of the H/V diagram is usually a shallow gradient…

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

  Figure 2-17. Induced flow. Figure 2-18. Normal induced flow velocities along the blade span during hovering flight. Downward velocity is highest at the blade tip where blade speed is highest. As blade speed decreases nearer the center ... 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 is inclined downward at some angle and opposite the effective…

• Helicopter Flying Handbookp. 9-7
  Chapter 9: Basic Flight Maneuvers › Hovering › Common Errors

  changes, which results in improper use of the controls. 4. Hovering too high, creating a hazardous flight condition. The height velocity chart should be referenced to determine the maximum skid height to hover and safely recover the helicopter should ... rollover accidents usually occur over a level surface. Hovering Turn A hovering turn is a maneuver performed at hovering height in which the nose of the helicopter is rotated either left or right while maintaining position over a reference point…