AVIT 323 Block 10 Exam Questions
and Answers 100% Pass
What is the definition of induced drag? - ✔✔The aft-acting component of lift.
How does velocity impact induced drag? - ✔✔Faster aircraft have less induced drag
How does AOA impact induced drag? - ✔✔Increase in AOA=Increase in induced drag
What determines induced drag? - ✔✔Lift
Do wingtip vortices provide induced drag? - ✔✔Yes
What is the sphere of influence? - ✔✔Airflow that is affected by the airfoil
What happens to induced drag as AR goes up? - ✔✔As aspect ratio goes up induced
drag goes down.
What is aspect ratio? - ✔✔1) The ratio of a wing's length to it's chord.
2) A long and skinny wing has a high AR, whereas short and stubby wing has a low
AR.
What happens to induced drag as weight goes up? - ✔✔1) As weight goes up induced
drag goes up.
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, 2) Heavier aircraft must fly at a higher AOA therefore increasing induced drag.
What happens to induced drag as speed increases? - ✔✔Induced drag goes down, faster
speed=less downwash on the wing and rearward inclination of lift is less.
What happens to induced drag as altitude goes up? - ✔✔Induced drag increases, higher
altitudes air is less dense meaning we must fly at higher AOA increasing induced drag.
Why are wingtip vortices included in induced drag? - ✔✔Because vortices are caused
by lift and take out energy.
What is viscosity? - ✔✔Resistance to shear
*High viscosity fluids are thick and resist flow, low viscosity is thin and flows easily.
What happens to the boundary layer during the adverse pressure gradient? - ✔✔The
boundary layer weakens
*Flow can also slow to a point of reversing, once reversed the boundary layer separates
from the surface.
What two types of drag increase as the boundary layer separates? - ✔✔1) Pressure Drag
2) Induced Drag
What causes parasite drag? - ✔✔All forces that work to slow an aircraft's movement
Is parasite drag associated with the production of lift? - ✔✔No
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and Answers 100% Pass
What is the definition of induced drag? - ✔✔The aft-acting component of lift.
How does velocity impact induced drag? - ✔✔Faster aircraft have less induced drag
How does AOA impact induced drag? - ✔✔Increase in AOA=Increase in induced drag
What determines induced drag? - ✔✔Lift
Do wingtip vortices provide induced drag? - ✔✔Yes
What is the sphere of influence? - ✔✔Airflow that is affected by the airfoil
What happens to induced drag as AR goes up? - ✔✔As aspect ratio goes up induced
drag goes down.
What is aspect ratio? - ✔✔1) The ratio of a wing's length to it's chord.
2) A long and skinny wing has a high AR, whereas short and stubby wing has a low
AR.
What happens to induced drag as weight goes up? - ✔✔1) As weight goes up induced
drag goes up.
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, 2) Heavier aircraft must fly at a higher AOA therefore increasing induced drag.
What happens to induced drag as speed increases? - ✔✔Induced drag goes down, faster
speed=less downwash on the wing and rearward inclination of lift is less.
What happens to induced drag as altitude goes up? - ✔✔Induced drag increases, higher
altitudes air is less dense meaning we must fly at higher AOA increasing induced drag.
Why are wingtip vortices included in induced drag? - ✔✔Because vortices are caused
by lift and take out energy.
What is viscosity? - ✔✔Resistance to shear
*High viscosity fluids are thick and resist flow, low viscosity is thin and flows easily.
What happens to the boundary layer during the adverse pressure gradient? - ✔✔The
boundary layer weakens
*Flow can also slow to a point of reversing, once reversed the boundary layer separates
from the surface.
What two types of drag increase as the boundary layer separates? - ✔✔1) Pressure Drag
2) Induced Drag
What causes parasite drag? - ✔✔All forces that work to slow an aircraft's movement
Is parasite drag associated with the production of lift? - ✔✔No
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