AE109

Question 1

What is the definition of boundary layer separation?

Answer 1

Point in streamline where airflow no longer adheres to the airfoil

Question 2

What is the point of stall on a CL curve?

Answer 2

C_L(MAX)

Question 3

What is the definition of a stall?

Answer 3

Condition in flight where increase in AOA results in decrease in C_L

Question 4

What is the key difference between an aircraft’s stall AOA and stall airspeed?

Answer 4

Stall AOA remains constant; stall airspeed is variable

Question 5

Which type of stall will have lower stall airspeed?

Answer 5

Power-on stall

Question 6

What are the factors associated with increased thrust that impact stall characteristics?

Answer 6

Vertical component of thrust and propeller acceleration factor

Question 7

Which flight control would you expect to be most effective during a stall/stall recovery?

Answer 7

Rudder

Question 8

Which aircraft would stall at a higher indicated airspeed? One weighing 5500 lbs or one weighing 6000 lbs?

Answer 8

The heavier aircraft

Question 9

Which aircraft would stall at a higher true airspeed? The one at 12,000 ft or the one at 20,000 ft?

Answer 9

The higher one

Question 10

How do you think increased G loading will affect stall airspeed?

Answer 10

Stall airspeed increases

Question 11

What is the T-6A stall AOA?

Answer 11

18 units

Question 12

What is the primary artificial stall warning in the T-6A?

Answer 12

Stick shaker

Question 13

What does activation of the stick shaker indicate?

Answer 13

Aircraft is approximately 5 to 10 knots above stall speed

Question 14

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

Answer 14

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

Question 15

If the aircraft is in a stall, what could happen if you misapply the controls or if the aircraft is out of
trim?

Answer 15

Aircraft could enter a spin

Question 16

If stalled and yawed, which aircraft would enter an erect spin? One pulling +3 G or one pulling -2 G?

Answer 16

The aircraft stalled at +3Gs

Question 17

During a spin, what will happen if the ailerons are deflected in spin direction?

Answer 17

Roll and yaw will become more oscillatory

Question 18

How does anti-spin rudder aid in recovery?

Answer 18

Slows rotation and decreases AOA

Question 19

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

Answer 19

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

Question 20

Lower pitch attitude at stall results in higher stall airspeed (greater energy) which results in what?

Answer 20

faster spin entry airspeed and greater oscillations.

Question 21

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

Answer 21

Right

Question 22

When does an aircraft produce wingtip vortices?

Answer 22

Whenever it is producing lift

Question 23

What three factors primarily affect vortex strength?

Answer 23

Weight, speed, and configuration

Question 24

What are the two main hazards associated with wake turbulence?

Answer 24

Induced roll and induced flow field

Question 25

Assume you are planning an approach with an airspeed of 110 KIAS when tower reports a 15 knot decreasing performance wind shear. What configuration should you use and what airspeed should you fly?

Answer 25

a. Takeoff flaps and 120 KIAS

b. Normal approach speed + predicted wind shear = adjusted approach speed (up to 10 knots above normal)

Question 26

What is the definition of a stall?

Answer 26

Condition in flight where increase in AOA results in decrease in C_L

Question 27

What are the two major classifications of stalls?

Answer 27

Power-on and power-off stalls

Question 28

Which type of stall will have lower stall airspeed?

Answer 28

Power-on stall

Question 29

What is the only reason the T-6A will stall?

Answer 29

Exceeding stall AOA (18 units)

Question 30

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

Answer 30

Stall and yaw

Question 31

What causes an accelerated spin?

Answer 31

Spinning with the control stick anywhere other than full aft

Question 32

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

Answer 32

Full left rudder

Question 33

When taking off behind a heavy aircraft in the T-6A, you should allow for a minimum spacing of how many minutes?

Answer 33

2 minutes

Question 34

When landing behind a heavy aircraft that has just landed, what should you do to minimize the effects
of its wake turbulence?

Answer 34

Delay landing for three minutes. In addition, you can land beyond the landing aircraft’s nose
gear touchdown point.

Question 35

How will a wind shear that decreases your headwind component by 20 knots affect your aircraft?

Answer 35

Indicated airspeed will decrease 20 knots, thereby decreasing lift.

Question 36

An aircraft reported wind shear on final with a 10 knot loss of airspeed. How should you adjust your
approach and what things should you look out for?

Answer 36

a. Set flaps to “Takeoff”
b. Add 10 knots to your approach speed
c. Be alert for the tendency to land long

Question 37

What force opposes and controls the adverse pressure gradient?

Answer 37

The kinetic energy of the relative wind