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Flashcards in AE109 Deck (37)
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1
Q

What is the definition of boundary layer separation?

A

Point in streamline where airflow no longer adheres to the airfoil

2
Q

What is the point of stall on a CL curve?

A

C_L(MAX)

3
Q

What is the definition of a stall?

A

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

4
Q

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

A

Stall AOA remains constant; stall airspeed is variable

5
Q

Which type of stall will have lower stall airspeed?

A

Power-on stall

6
Q

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

A

Vertical component of thrust and propeller acceleration factor

7
Q

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

A

Rudder

8
Q

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

A

The heavier aircraft

9
Q

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

A

The higher one

10
Q

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

A

Stall airspeed increases

11
Q

What is the T-6A stall AOA?

A

18 units

12
Q

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

A

Stick shaker

13
Q

What does activation of the stick shaker indicate?

A

Aircraft is approximately 5 to 10 knots above stall speed

14
Q

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

A

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

15
Q

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

A

Aircraft could enter a spin

16
Q

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

A

The aircraft stalled at +3Gs

17
Q

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

A

Roll and yaw will become more oscillatory

18
Q

How does anti-spin rudder aid in recovery?

A

Slows rotation and decreases AOA

19
Q

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

A

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

20
Q

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

A

faster spin entry airspeed and greater oscillations.

21
Q

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

A

Right

22
Q

When does an aircraft produce wingtip vortices?

A

Whenever it is producing lift

23
Q

What three factors primarily affect vortex strength?

A

Weight, speed, and configuration

24
Q

What are the two main hazards associated with wake turbulence?

A

Induced roll and induced flow field

25
Q

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?

A

a. Takeoff flaps and 120 KIAS

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

26
Q

What is the definition of a stall?

A

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

27
Q

What are the two major classifications of stalls?

A

Power-on and power-off stalls

28
Q

Which type of stall will have lower stall airspeed?

A

Power-on stall

29
Q

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

A

Exceeding stall AOA (18 units)

30
Q

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

A

Stall and yaw

31
Q

What causes an accelerated spin?

A

Spinning with the control stick anywhere other than full aft

32
Q

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

A

Full left rudder

33
Q

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

A

2 minutes

34
Q

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

A

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

35
Q

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

A

Indicated airspeed will decrease 20 knots, thereby decreasing lift.

36
Q

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?

A

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

37
Q

What force opposes and controls the adverse pressure gradient?

A

The kinetic energy of the relative wind