SH.VIII.I.K1

From the FAA library

• 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 ... 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 effect causes an increase in the local pressure at the static source…

• 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…

• Helicopter Flying Handbookp. 12-6
  Chapter 12: Night Operations › Night Vision › Confusion with Ground Lights

  Relative-Motion Illusion Relative motion is the falsely perceived self-motion in relation to the motion of another object. The most common example is as follows. An individual in a car is stopped at a traffic light and another ... during flight in situations such as formation flight, hover taxi, or hovering over water or tall grass. Confusion with Ground Lights Confusion with ground lights occurs when a pilot mistakes ground lights for stars. The pilot can place the helicopter…

• 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…

• Aviation Maintenance Technician Handbook - Powerplantp. 4-65
  Chapter 4: Engine Ignition & Electrical Systems › Bonding & Grounding › General Bonding & Grounding Procedures

  Figure 4-115. Repairing broken wire by soldering and potting. Figure 4-116. Connecting terminals to terminal block. Bonding & Grounding Bonding is the electrical connecting of two or more conducting objects not otherwise connected adequately. Grounding is the electrical connecting ... return of current. Primary structure is the main frame, fuselage, or wing structure of the aircraft. Bonding and grounding connections are made in aircraft electrical systems to: 1. Protect aircraft and personnel against hazards from lightning discharge, Provide current return…