Questions and CORRECT Answers
In one sentence, define induced drag and be very specific - CORRECT ANSWER - The
aft-acting component of lift
What is parasite drag? - CORRECT ANSWER - Any drag that is not caused by the
production of lift
What is the boundary layer? - CORRECT ANSWER - Layer of air over the surface which
shows local retardation due to viscosity
What are the 3 sections in the boundary layer? - CORRECT ANSWER - Laminar,
Transition and Turbulent
Explain sphere of influence - CORRECT ANSWER - High aspect ratio changes the
airflow minimally
See circles
What happens to induced drag as aspect ratio goes up? - CORRECT ANSWER - Induced
drag is decreased (less down-wash) the longer the wing the easier the aircraft has to work to
produce lift
What happens to induced drag as weight goes up? - CORRECT ANSWER - Increases
induced drag
What happens to induced drag as speed goes up? - CORRECT ANSWER - Induced drag
goes down
What happens to induced drag as altitude goes up? - CORRECT ANSWER - Induced drag
increases