Aerodynamics

Question 1

Why can a swept wing aircraft go faster?

Question 2

What is critical mach? What happens to the center of pressure/lift as we enter mach tuck?

Question 3

What is a coffin corner?

Question 4

What is Mach Buffet?

Question 5

What is Dutch Roll?

Question 6

Why do airliners all have swept wings?

Question 7

What is chord-wise flow vs span-wise flow?

Question 8

What is mach tuck?

Question 9

What are the stages of a jet engine?

Question 10

What to do if you find yourself getting closer to coffin corner?

Question 11

What type of wing does a Cessna have?

Question 12

What are wing tip vortices?

Question 13

What is a Hershey bar wing?

Question 14

How does a winglet work? Draw it.

Answer 14

it directs the wing airflow up and away from the upper wing surface reducing induced drag

Question 15

What is area rule?

Answer 15

The “pinched waist” – there is an indentation in the fuselage near the wing, which reduces the drag at transonic speed, allowing the airplane to fly faster and farther without increasing power

Question 16

Describe a Delta Wing.

Answer 16

A delta wing is an airfoil shaped like a triangle

Question 17

What is Shock Stall?

Answer 17

A marked increase in drag and a loss of lift and control on an aircraft approaching the speed of sound.

Question 18

What are the different types of drag? Does induced drag increase with airspeed or decrease?

Answer 18

Induced drag is highest at low airspeed and parasite drag is highest at high airspeed. The best glide airspeed is where the induced drag equals the parasite drag (where the curves intersect on a drag/airspeed graph).