Chapter 2

Question 1

Following a disturbance, an airplane that returns to its original position unassisted by the pilot is said to be inherently stable. Is this sort of airplane easier to fly?

Answer 1

a

Question 2

If the center of pressure is behind the center of gravity, what sort of pitching moment will the lift-weight couple have?

Answer 2

a

Question 3

If the thrust line is lower than the drag line, what sort of pitching moment will the thrust-drag couple have?

Answer 3

a

Question 4

In questions 2 and 3, if there was a sudden loss of thrust, what would the nose do?

Answer 4

a

Question 5

Where is the center of pressure in relation to the center of gravity in most training airplanes?

Answer 5

a

Question 6

What sort of aerodynamic force does the horizontal stabilizer product?

Answer 6

a

Question 7

When power is reduced what will the reduced propeller slipstream and reduced downwash over the horizontal stabilizer cause the nose to do?

Answer 7

a

Question 8

Longitudinal stability refers to the motion of the airplane about its:
a. longitudinal axis
b. lateral axis.
c. vertical axis (sometimes called the normal axis)

Answer 8

a

Question 9

What is rotation about the lateral axis known as?

Answer 9

a

Question 10

What is rotation about the vertical axis known as?

Answer 10

a

Question 11

What is the most important factor contributing to longitudinal stability?

Answer 11

a

Question 12

Is longitudinal stability greater with a forward CG?

Answer 12

a

Question 13

True or false? An airplane loaded with the CG too far aft will be stable at slow speeds, but if stalled will be difficult to recover.

Answer 13

a

Question 14

Will a forward CG location cause an airplane to be more unstable at high speeds?

Answer 14

a

Question 15

How can aircraft directional stability be improved?

Answer 15

a

Question 16

If the airplane is loaded incorrectly so that the CG is forward of the allowable range, the elevator force required to flare the airplane for landing will be:
a. the same as usual
b. greater than usual
c. less than usual

Answer 16

a

Question 17

If a wing has dihedral or sweepback, which sort of stability is increased?

Answer 17

a

Question 18

If an airplane is yawed, it will sideslip. What will the dihedral cause it to do?

Answer 18

a

Question 19

What primary control provides pitch?

Answer 19

a

Question 20

Nose movement up and down occurs in which plane?

Answer 20

a

Question 21

Nose movement involves angular movement around its CG as well as which axis?

Answer 21

a

Question 22

In order to raise the nose and lower the tail of the airplane, which direction does the trailing edge of the elevator move in?

Answer 22

a

Question 23

What are the consequences of loading the airplane incorrectly with:
a. the center of gravity forward of the forward limit?
b. with the center of gravity behind the aft limit?

Answer 23

a

Question 24

What primary control provides roll?

Answer 24

a

Question 25

Rolling is angular motion about which axis running through the CG?

Answer 25

a

Question 26

In which direction does the pilot move the control column to make the right wing raise?

Answer 26

a

Question 27

True or false? At normal flight speeds, for the right wing to raise, the right aileron will go down and the left aileron will go up.

Answer 27

a

Question 28

True or false? If differential ailerons are used to counteract the effect of adverse yaw effect, one aileron will raise by an amount the same as the other aileron is lowered.

Answer 28

a

Question 29

Does the area below the wing have higher static pressure than the area above the wing?

Answer 29

a

Question 30

Yawing occurs about which axis that passes through the CG?

Answer 30

a

Question 31

An airplane is banking left for a left turn. What effect will the extra drag on the right aileron have?

Answer 31

a

Question 32

How can adverse yaw effect be reduced?

Answer 32

a

Question 33

What primary control provides yaw?

Answer 33

a

Question 34

Yawing increases the speed of the outer wing. Does this cause its lift to increase? IF so, what does this lead to?

Answer 34

a

Question 35

Yaw also generates a sideslip. Will the dihedral on the more forward wing cause it to rise?

Answer 35

a

Question 36

At high airspeeds, are the control surfaces more effective than at low airspeeds?

Answer 36

a

Question 37

Does slipstream from the propeller over the rudder and elevators increase their effectiveness?

Answer 37

a

Question 38

What is the purpose of aerodynamic balance?

Answer 38

a

Question 39

Give three examples of aerodynamic balance.

Answer 39

a

Question 40

If the stabilator is moved in the preflight external inspection, the anti-balance tab should: a. move in the same direction. b. move in the opposite direction. c. not move.

Answer 40

a

Question 41

If the elevator is moved in the preflight external inspection, the balance tab should: a. move in the same direction. b. move in the opposite direction. c. not move.

Answer 41

a

Question 42

What is mass balance used for?

Answer 42

a