Technical Subject Area: Principles Of Flight

Question 1

Parts of an Airfoil

Answer 1

Leading Edge, Trailing Edge, Lower Surface, Upper Surface, Chord Line (Straight line from leading edge to the trailing edge of the airfoil), Camber line (Average between both upper and lower surface, usually a curved line)

Question 2

TRUE or FALSE: Typical Airfoil Design consists of a flatter lower surface and a more curved upper surface

Answer 2

TRUE

Question 3

What does the curved upper surface do to the airflow?

Answer 3

Airflow is increased over the curved surface and a lower pressure area is created

Question 4

What does the flatter lower surface of an airfoil do to the airflow?

Answer 4

Airflow remains largely unchanged, and remains a higher pressure than the upper surface

Question 5

Wingtip vortices flow in an _____, _____, and _____ motion

Answer 5

Outward, Upward, and Downward

Question 6

“Stay in the _____” is a common phrase describing how to about wingtip vortices (wake turbulence) from other aircraft

Answer 6

Bowl (“Stay in the bowl”)

Question 7

Aircraft generate the greatest wingtip vortices when they are _____, _____, and _____

Answer 7

Clean, Slow, and Heavy

Question 8

What is Stability?

Answer 8

Stability is the inherent quality of an aircraft to correct for conditions that may disturb equilibrium and to return to or to continue on the original flight path.

Question 9

What is Static Stability?

Answer 9

Static Stability refers to the initial tendency, or direction of movement, back to equilibrium. In aviation, it refers to the aircraft’s initial response when disturbed from a given pitch, yaw, or bank.