C17 - Ground Effect Flashcards
Define Ground Effect?
Reduction in Drag for the same amount of Lift.
When does Ground Effect happen?
When an Aircraft’s height above the surface is the same as it’s wingspan
Which type of Aircraft will feel greater Ground Effect?
Low-wing Aircraft.
What happens during Ground Effect?
The Aircraft has the tendency to float.
True or False. Ground Effect can also be felt during Take-off?
True. There’s an increase in Drag.
Name two reasons which cause Ground Effect?
- The Wing is close to the ground.
- Surface blocks tip vortices and downwash.
What increases as an Aircraft enters Ground Effect?
Coefficient of Lift.
What can ‘Ballooning’ become potentially dangerous?
Ballooning can increase the height of an Aircraft whilst decelerating and becoming closer to the Stalling Speed.
What happens to Induced Drag when entering Ground Effect?
Decreases.
What happens to Lift when entering Ground Effect?
Increases.
What happens to Stalling Angle of Attack when entering Ground Effect?
Decreases.
What happens to nose of Aircraft when entering Ground Effect?
Pitches Down.
What happens to ASI when entering Ground Effect?
Under reads.
What happens to Induced Drag when leaving Ground Effect?
Increases.
What happens to Lift when leaving Ground Effect?
Decreases.
