Ground effect definition

Ground effect means the change in aerodynamic characteristics due to modification of the air flow past the aircraft caused by the presence of the ground.
Ground effect means a condition of improved performance (lift) due to the interference of the
Ground effect means a condition of improved performance (lift) due to the interference of the surface with the airflow pattern of the rotor system when a helicopter or other VTOL aircraft is operating near the ground. Rotor efficiency is increased by ground effect to a height of about one rotor diameter for most helicopters. (in definition of ‘air-taxiing’, GM2 to AMC13 ATS.TR.210(a)(3));

Examples of Ground effect in a sentence

  • Ground effect machines (GEMS), including surface effect machines and air cushion vehicles, ‘‘specially designed’’ for use by a military.

  • GPA reserves the right to change the projected Performance Improvement Plan project schedule prior to Phase Two Proposal submittals.

  • Ground effect machines (hovercraft), convertiplanes, or aircraft that hover by means of propeller slipstream(s) deflected downward are not considered to be helicopters.

  • Ground effect machines (GEMS), including surface effect machines and air cushion vehicles, “specially designed” for use by a military.

  • Controlled opening equipment or automatic piloting systems, designed for parachuted loads.j. Ground effect machines (GEMS), including surface effect machines and air cushion vehicles, “specially designed” for use by a military.k. through s.

  • Ground effect is the interference of sound reflected by the ground interfering with the sound propagating directly from source to receiver.

  • At low Altitude, Ground effect can lead to unexpected wake vortex behavior.

  • Theory of flight — rotary wing aerodynamics 1 2 — Terminology; Effects of gyroscopic precession; Torque reaction and directional control; Dissymmetry of lift, blade tip stall; Translating tendency and its correction; Coriolis effect and compensation; Vortex ring state, power settling, overpitching; Auto-rotation; Ground effect.

  • Controlled opening equipment or automatic piloting systems, designed for parachutedloads.j. Ground effect machines (GEMS), including surface effect machines and air cushion vehicles, “specially designed” for use by a military.k. through s.

  • LWA [dB(A) re 1 pW] Figure 15 - Ground effect calculated for different sound prediction methods.

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