AE107

Question 1

Define poststall gyration.

Answer 1

Aerodynamic forces during stall that result in movement around the pitch, roll, and yaw
axes

Question 2

What is the key factor affecting the intensity of poststall gyrations?

Answer 2

The airspeed at the time of stall

Question 3

What is the definition of Angle of Attack (AOA)?

Answer 3

Angle between the chordline and the relative wind

Question 4

In a spin, which wing will have the higher AOA, up-going or down-going wing?

Answer 4

Down-going (inside) wing

Question 5

What is the cause of autorotation in a spin?

Answer 5

Unequal lift and drag forces acting on each wing

Question 6

If stalled and yawed, which aircraft would enter an inverted spin?

Answer 6

Neither. An aircraft must be in a negative G stall and yaw to enter an inverted spin.

Question 7

How does anti-spin rudder aid in recovery?

Answer 7

Slows rotation and decreases AOA

Question 8

Would an aircraft spinning with the stick other than full aft be in an accelerated or unaccelerated spin?

Answer 8

Anytime the aircraft is spinning with the stick other than full aft, the spin is accelerated.

Question 9

Higher pitch attitude at stall results in ________ spin entry and __________ oscillations.

Answer 9

slower; less

Question 10

Will a left or right spin stabilize at a lower pitch attitude?

Answer 10

Right

Question 11

What causes the variance in left and right spin characteristics?

Answer 11

Gyroscopic effect of the propeller

Question 12

What two conditions must be present in order for an aircraft to spin?

Answer 12

Stall and yaw

Question 13

How does the introduction of yaw affect the lift and drag of a stalled wing?

Answer 13

Causes asymmetrical lift and drag between the outside and inside wing

Question 14

What conditions must be present to enter an inverted spin?

Answer 14

Negative G stall and yaw introduced

Question 15

What is the main aerodynamic factor affecting spins?

Answer 15

Conservation of angular momentum

Question 16

What causes an accelerated spin?

Answer 16

Spinning with the control stick anywhere other than full aft

Question 17

In a right spin, which rudder position will provide the greatest anti-spin forces?

Answer 17

Full left rudder

Question 18

How can a progressive spin be entered?

Answer 18

By maintaining full aft stick while applying and holding anti-spin rudder

Question 19

Which aircraft will enter a spin slower, with less oscillation, and take longer to recover?
An aircraft weighing 4000 lbs or one weighing 6000 lbs?

Answer 19

6000 pound aircraft

Question 20

Which aircraft will spin at a lower pitch attitude and higher rotation rate?
An aircraft pitching down and entering a RIGHT spin, or an aircraft pitching down and entering a LEFT spin?

Answer 20

Right spin

a. Stabilizes at lower pitch
b. Stabilizes more slowly with increased oscillations
c. Rotation rate increased

Question 21

Can an aircraft that is not stalled be in a spin?

Answer 21

No. Both stall and yaw must be present to spin.