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));