Wake Turbulence Flashcards
What is Wake Turbulence?
Rotating air masses generated behind the wing tips of aircraft, or behind rotor tips of helicopters in forward motion.
What are rotating air masses generated behind the wing tips of aircraft, or behind rotor tips of helicopters in forward motion?
Wake Turbulence
What are Vortices?
- Circular patterns of air
- created by the movement of an airfoil
- through the air when generating lift.
- Rotating column of air;
- can be hazardous to aircraft.
What are Circular patterns of air created by the movement of an airfoil through the air when generating lift. Rotating column of air; can be hazardous to aircraft?
Vortices
What is Clean Configuration?
When an Aircraft is configured for flight with no flaps, gear retracted, and no other wing extensions, such as air brakes.
What is the configuration when an Aircraft is configured for flight with no flaps, gear retracted, and no other wing extensions, such as air brakes.
Clean Configuration
What is Dirty Configuration?
Aircraft is configured for flight with flaps, gear extended, and additional wing extensions, such as air brakes.
What is the configuration when the Aircraft is configured for flight with flaps, gear extended, and additional wing extensions, such as air brakes?
Dirty Configuration
What is Rollup Effect?
- Difference in pressure above/below an airfoil
- results in airflow twisting into
- counter-rotating cylindrical vortices.
What is the difference in pressure above or below an airfoil that results in airflow twisting into counter-rotating cylindrical vortices?
The Rollup Effect.
What is an Induced Roll?
Mechanical force a wake vortex has on an aircraft. Without counter action, causes an aircraft to roll/spin on its longitudinal axis.
What is the Mechanical force a wake vortex has on an aircraft called?
Induced Roll
What is Downwash?
- Wake turbulence generated from helicopters
- in a slow or stationary hover,
- pushing downwards and
- outwards from the rotor.
What is Wake turbulence generated from helicopters in a slow or stationary hover, pushing downwards and outwards from the rotor called?
Downwash
What is Jet Blast?
Exhaust from a jet engine.
What is Exhaust from a jet engine called?
Jet Blast
What are the three factors that determine the intensity of wake turbulence?
Weight of the aircraft
Speed of the aircraft
Shape (configuration) of the airfoil
Do all aircraft generate wake turbulence in flight?
Yes