Lift and Drag

Question 1

Lift is defined as what?

Answer 1

Component of aerodynamic force that acts perpendicular to the relative wind

Question 2

In straight and level flight (constant lift), angle of attack and velocity have ____ relationship.

Answer 2

An inverse

Question 3

Which airfoil produces no lift at zero degrees angle of attack?

Answer 3

Symmetric airfoil

Question 4

What is the benefit of geometric and aerodynamic twist on a wing?

Answer 4

The wing root stalls before the wing tip

Question 5

Parasite drag is defined as what?

Answer 5

Drag caused by anything other than the creation of lift

Question 6

Painting or cleaning the surface of a wing or aircraft will do what?

Answer 6

Reduce friction drag

Question 7

Induced drag is caused by what?

Answer 7

The production of lift

Question 8

In level flight, an increase in velocity will do what?

Answer 8

Decreased induced drag

Question 9

Total drag is a combination of what?

Answer 9

Induced drag and parasite drag

Question 10

In relation to velocity, total drag does what?

Answer 10

Decreases until L/DMAX, then increases

Question 11

Ground effect is a phenomenon that reduces ____ due to a decrease in ____.

Answer 11

Induced drag, downwash

Question 12

Thrust is the force that opposes what?

Answer 12

Drag

Question 13

Thrust available ____ as velocity increases for a propeller-driven aircraft

Answer 13

Decreases

Question 14

As velocity increases, a propeller’s PA will initially increase then ____

Answer 14

Decrease

Question 15

To roll the airplane to the right, what must happen

Answer 15

The right aileron rises decreasing lift, and the left aileron lowers, increasing lift

Question 16

For the nose of the airplane to pitch up, what happens?

Answer 16

Trailing edge of the elevator must move up in relation to the horizontal stabilizer

Question 17

Increasing the camber of a wing does what?

Answer 17

Increases lift

Question 18

The T-6A has what kind of trailing edge flaps?

Answer 18

Split

Question 19

Lowering the landing gear handle causes an increase in what?

Answer 19

Parasite drag

Question 20

Aerodynamic force is what?

Answer 20

Result of pressure and friction distribution over an airfoil

Question 21

What is the component of aerodynamic force that acts parallel to the relative wind?

Answer 21

Drag

Question 22

What kind of airfoil produces lift at zero degrees angle of attack?

Answer 22

Positively cambered

Question 23

L/DMAX is the point where ____

Answer 23

The ratio of lift to drag is the greatest

Question 24

Total drag is composed of what?

Answer 24

Induced and parasite drag

Question 25

Parasite drag is what?

Answer 25

Made up of form, friction, and interference drag

Question 26

Maximum excess power for a propeller-driven aircraft occurs ____ L/DMAX

Answer 26

At

Question 27

As altitude increases, power available does what?

Answer 27

Decreases

Question 28

Lowering the flaps to ____ during an approach ____ drag but ____ visibility

Answer 28

Landing (full), increases, improves