HI.VIII.A.S9

From the FAA library

• Helicopter Flying Handbookp. 9-12
  Chapter 9: Basic Flight Maneuvers › Normal Takeoff from a Hover › Technique

  Normal Takeoff from a Hover A normal takeoff from a hover is an orderly transition to forward flight and is executed to increase altitude safely and expeditiously. Before initiating a takeoff, the pilot should ensure that the proper checklist ... been completed and the helicopter systems are within normal limits. During the takeoff, fly a profile that avoids the cross-hatched or shaded areas of the height/velocity diagram. Technique Refer to Figure 9-12 (position 1). Bring the helicopter…

• Helicopter Flying Handbookp. 9-2
  Chapter 9: Basic Flight Maneuvers › The Four Fundamentals › Guidelines

  Good practices to follow during maneuvering flight include: 1. Move the cyclic only as fast as trim, torque, and rotor speed can be maintained. When entering a maneuver and the trim, rotor, or torque reacts quicker than anticipated, pilot limitations ... have been exceeded. If continued, an aircraft limitation will be exceeded. Perform the maneuver with less intensity until all aspects of the machine can be controlled. The pilot must be aware of the sensitivity of the flight controls…

• Pilot's Handbook of Aeronautical Knowledgep. 5-44
  Chapter 5: Aerodynamics of Flight › High Speed Flight › Subsonic Versus Supersonic Flow

  Compressibility (and to a lesser extent viscosity) is of paramount importance at speeds approaching the speed of sound. In these speed ranges, compressibility causes a change in the density of the air around an aircraft. During flight, a wing produces ... lift by accelerating the airflow over the upper surface. This accelerated air can, and does, reach sonic speeds even though the aircraft itself may be flying subsonic. At some extreme AOAs, in some aircraft, the speed of the air over…

• Helicopter Flying Handbookp. 2-15
  Chapter 2: Aerodynamics of Flight › Hovering Flight › Translating Tendency (Drift)

  Translating Tendency (Drift) During hovering flight, a single main rotor helicopter tends to move in the direction of tail rotor thrust. This lateral (or sideward) movement is called translating tendency. [Figure 2-27] To counteract this tendency, one or more ... following features may be used. All examples are for a counterclockwise rotating main rotor disk. Figure 2-27. A tail rotor is designed to produce thrust in a direction opposite torque. The thrust produced by the tail rotor is sufficient…

• Helicopter Flying Handbookp. 2-25
  Chapter 2: Aerodynamics of Flight › Turning Flight

  Figure 2-45. Forces acting on the helicopter during turning flight. Autorotation is the state of flight where the main rotor disk of a helicopter is being turned by the action of air moving up through the rotor rather than ... engine power driving the rotor. In normal, powered flight, air is drawn into the main rotor disk from above and exhausted downward, but during autorotation, air moves up into the rotor disk from below as the helicopter descends. Autorotation…

• 14 CFR Part 1 — Definitions and AbbreviationsOpen
  14 CFR § 1.2 Abbreviations and symbols.

  Abbreviations and symbols. VS means the stalling speed or the minimum steady flight speed at which the airplane is controllable. VS0 means the stalling speed or the minimum steady flight speed in the landing configuration. VS1 means the stalling speed ... minimum steady flight speed obtained in a specific configuration. VSR means reference stall speed. VSRO means reference stall speed in the landing configuration. VSR1 means reference stall speed in a specific configuration. VSW means speed at which onset of natural…