1.6: Ground Effect Flashcards
What effect can frost have on an airplane?
Frost on the wings of an airplane will effect take off performance by disrupting the smooth flow of air over the wing adversely effecting its lifting capability.
Additionally, frost may prevent an airplane from becoming airborne at normal takeoff speed.
What may result from “Ground effect” during landing?
Ground effect may cause an airplane to float on landings or permit it to become airborne with insufficient airspeed to stay in flight above the area of ground effect.
What may result from “Ground effect” during takeoff?
An airplane may settle back to the surface abruptly after flying through the ground effect if the pilot has not attained recommended takeoff airspeed.
When will ground effect most likely cause floating?
Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at less than the length of the wingspan above the surface.
What are the aerodynamic effects of ground effect?
The vertical component of the airflow around the wing is restricted, which alters the wing’s upwash, downwash, and wingtip vortices.
An aircraft leaving ground effect during takeoff will?
Experience an increase in induced drag and a decrease in performance.
What must a pilot be aware of as a result of ground effect?
Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.
Ground effect is most likely to result in which problem?
Becoming airborne before reaching the recommended takeoff speed.
What is ground effect?
A. The result of the interference of the surface of the Earth with the airflow patterns about an airplane.
B. The result of an alteration in airflow patterns increasing induced drag about the wings of an airplane.
C. The result of the disruption of the airflow patterns about the wings of an airplane to the point where the wings will no longer support the airplane in flight.
The result of the interference of the surface of the Earth with the airflow patterns about an airplane.
Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at
A. less than the length of the wingspan above the surface.
B. twice the length of the wingspan above the surface.
C. a higher-than-normal angle of attack.
less than the length of the wingspan above the surface.
What must a pilot be aware of as a result of ground effect?
A. Wingtip vortices increase creating wake turbulence problems for arriving and departing aircraft.
B. Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.
C. A full stall landing will require less up elevator deflection than would a full stall when done free of ground effect.
Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.
An aircraft leaving ground effect during takeoff will
A. experience a reduction in ground friction and require a slight power reduction.
B. experience an increase in induced drag and a decrease in performance.
C. require a lower angle of attack to maintain the same lift coefficient.
experience an increase in induced drag and a decrease in performance.
Ground effect is most likely to result in which problem?
A. Settling to the surface abruptly during landing.
B. Becoming airborne before reaching recommended takeoff speed.
C. Inability to get airborne even though airspeed is sufficient for normal takeoff needs.
Becoming airborne before reaching recommended takeoff speed.
