HI.XI.J.R1

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• Pilot's Handbook of Aeronautical Knowledgep. 5-11
  Chapter 5: Aerodynamics of Flight › Ground Effect

  Figure 5-16. Ground effect changes airflow. Ground effect also alters the thrust required versus velocity. Since induced drag predominates at low speeds, the reduction of induced drag due to ground effect will cause a significant reduction of thrust required ... parasite plus induced drag) at low speeds. Due to the change in upwash, downwash, and wingtip vortices, there may be a change in position (installation) error of the airspeed system associated with ground effect. In the majority of cases, ground…

• Helicopter Flying Handbookp. 11-11
  Chapter 11: Helicopter Emergencies and Hazards › Ground Resonance

  Ground Resonance Helicopters with articulating rotors (usually designs with three or more main rotor blades) are subject to ground resonance, a destructive vibration phenomenon that occurs at certain rotor speeds when the helicopter is on the ground. Ground resonance ... balance rotor. The unbalanced rotor disk vibrates at the same frequency (or multiple thereof) of the airframe’s resonant frequency, and the harmonic oscillation increases because the engine is adding power to the system, increasing the magnitude (amplitude…

• Aviation Instructor's Handbookp. 9-1
  Chapter 9: Techniques of Flight Instruction › Integrating Instruction Techniques › Ground Instruction

  Integrating Instruction Techniques A flight instructor uses many instructional techniques during ground instruction, when using simulation, and during hands-on aircraft training. Since flight training costs are high and new aircraft are more complex than in the past, the total ... time without sacrificing the quality of the end product. This section looks at teaching techniques in greater detail. Ground Instruction Ground instruction can be highly effective if it follows an overall plan designed to prepare the learner for flight…

• Pilot's Handbook of Aeronautical Knowledgep. 5-36
  Chapter 5: Aerodynamics of Flight › Load Factors › Load Factors and Flight Maneuvers

  Spins Load Factors and Flight Maneuvers Critical load factors apply to all flight maneuvers except unaccelerated straight flight where a load factor of 1 G is always present. Certain maneuvers considered in this section are known to involve relatively high ... load factors. Full application of pitch, roll, or yaw controls should be confined to speeds below the maneuvering speed. Avoid rapid and large alternating control inputs, especially in combination with large changes in pitch, roll, or yaw (e.g., large sideslip…

• 14 CFR Part 141 — Pilot SchoolsOpen
  14 CFR Part 141, Appendix H to Part 141—Ground Instructor Certification Course

  Part 141, Appendix H to Part 141—Ground Instructor Certification Course 1. Applicability. This appendix prescribes the minimum curriculum for a ground instructor certification course and an additional ground instructor rating course, required under this part, for the following ratings ... Ground Instructor—Basic. (b) Ground Instructor—Advanced. (c) Ground Instructor—Instrument. 2. Aeronautical knowledge training. (a) Each approved course must include at least the following ground training on the knowledge areas listed in paragraphs…

• Airplane Flying Handbookp. 7-4
  Chapter 7: Ground Reference Maneuvers › Drift and Ground Track Control › Constant Radius During Turning Flight

  With some experience, pilots may notice how wind direction affects the time needed for various segments of ground-referenced turns. To demonstrate the effect that wind has on turns, the pilot should select a straight-line ground reference, such ... road or railroad track. [Figure 7-3] Choosing a straight-line ground reference that is parallel to the wind, the airplane would be flown into the wind and directly over the selected straight-line ground reference. Once a straight-line…