T-34 Questions - Lift and Stalls

Question 1

What is pitch attitude?
A. The angle between the chordline and the tip path plane
B. The angle between the chordline and the relative wind
C. The angle between the longitudinal axis and the relative wind
D. The angle between the longitudinal axis and the horizon

Answer 1

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Question 2

define flight path

Answer 2

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Question 3

define relative wind

Answer 3

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Question 4

How is angle of attack measured?
A. Between the top surface of the airfoil and the chordline
B. Between the relative wind and the bottom surface of the airfoil C. Between the relative wind and the chordline
D. Between the mean camber line and the relative wind

Answer 4

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Question 5

Define mean camber line. How does the mean camber line define the type of airfoil?

Answer 5

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Question 6

Define aerodynamic center.

Answer 6

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Question 7

What is the effect on static pressure of increasing angle of attack on a symmetric airfoil?

Answer 7

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Question 8

Define aerodynamic force, and state the aerodynamic force equation.

Answer 8

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Question 9

What are the two component forces that make up the aerodynamic force?

Answer 9

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Question 10

State the lift equation, and identify the three factors that the pilot can normally control.

Answer 10

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Question 11

In order to maintain level flight while decreasing airspeed, what action must the pilot take?

Answer 11

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Question 12

Draw the CL curves for both symmetric and a positively cambered airfoils and explain their differences.

Answer 12

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Question 13

At what angle of attack is maximum lift produced?

Answer 13

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Question 14

What is the orientation of the lift vector to the relative wind?

Answer 14

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Question 15

An airplane that has been flying straight and level maintains constant airspeed and increases AOA to a new value below CLmax. What will happen?

Answer 15

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Question 16

An airplane that has been flying straight and level decreases airspeed and maintains a constant AOA. What will happen?

Answer 16

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Question 17

An airplane that has been flying straight and level increases airspeed and decreases AOA. What will happen?

Answer 17

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Question 18

An airplane that has been flying straight and level increases airspeed and increases AOA to a new value greater than CLmax. What will happen?

Answer 18

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Question 19

An airplane that has been flying straight and level maintains constant airspeed and decreases AOA. What will happen?

Answer 19

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Question 20

Describe laminar and turbulent flow.

Answer 20

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Question 21

What is the primary feature of airflow separation? During boundary layer separation, how does the separation point move along the airfoil?

Answer 21

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Question 22

Define stall. What is the cause of stall?

Answer 22

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Question 23

How does increasing the speed of an airfoil affect its stalling angle of attack?
A. Increases the stalling angle of attack
B. Reduces the stalling angle of attack
C. Has no effect on stalling angle of attack
D. Eliminates the stalling angle of attack

Answer 23

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Question 24

In a stall, what is the result of increasing AOA
A. CL increases and lift decreases
B. CL increases and lift increases
C. CL decreases and lift increases
D. CL decreases and lift decreases

Answer 24

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Question 25

Define stall speed and state the normal stall speed equation.

Answer 25

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Question 26

State the relationship of stall speed to gross weight and altitude.

Answer 26

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Question 27

The vertical component of thrust supports a portion of gross weight during a \_\_\_\_\_ stall, reducing stall speed by approximately \_\_\_\_ knots in the T-34C.
A. turning, 7
B. accelerated, 9
C. power on, 9
D. normal, 7

Answer 27

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Question 28

What is the purpose of high lift devices? How does each type of high lift device affect stalling AOA?

Answer 28

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Question 29

Name two boundary layer control devices. In general, how do slots work?

Answer 29

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Question 30

What effect does lowering the flaps have on lift and drag?
A. Increases lift and increases drag
B. Decreases lift and decreases drag
C. Increases lift without increasing drag
D. Does not affect lift but increases drag

Answer 30

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Question 31

List several high lift devices that increase the camber of an airfoil. Which are found on the T-34C? Which produces the greatest increase in CLmax?

Answer 31

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Question 32

Why is it beneficial for the wing root to stall first?

Answer 32

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Question 33

Define geometric and aerodynamic twist.

Answer 33

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Question 34

What are the general steps in a stall recovery?

Answer 34

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