T-34 Questions - Lift and Stalls Flashcards
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
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define flight path
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define relative wind
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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
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Define mean camber line. How does the mean camber line define the type of airfoil?
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Define aerodynamic center.
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What is the effect on static pressure of increasing angle of attack on a symmetric airfoil?
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Define aerodynamic force, and state the aerodynamic force equation.
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What are the two component forces that make up the aerodynamic force?
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State the lift equation, and identify the three factors that the pilot can normally control.
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In order to maintain level flight while decreasing airspeed, what action must the pilot take?
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Draw the CL curves for both symmetric and a positively cambered airfoils and explain their differences.
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At what angle of attack is maximum lift produced?
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What is the orientation of the lift vector to the relative wind?
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An airplane that has been flying straight and level maintains constant airspeed and increases AOA to a new value below CLmax. What will happen?
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An airplane that has been flying straight and level decreases airspeed and maintains a constant AOA. What will happen?
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An airplane that has been flying straight and level increases airspeed and decreases AOA. What will happen?
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An airplane that has been flying straight and level increases airspeed and increases AOA to a new value greater than CLmax. What will happen?
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An airplane that has been flying straight and level maintains constant airspeed and decreases AOA. What will happen?
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Describe laminar and turbulent flow.
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What is the primary feature of airflow separation? During boundary layer separation, how does the separation point move along the airfoil?
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Define stall. What is the cause of stall?
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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
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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
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Define stall speed and state the normal stall speed equation.
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State the relationship of stall speed to gross weight and altitude.
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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
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What is the purpose of high lift devices? How does each type of high lift device affect stalling AOA?
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Name two boundary layer control devices. In general, how do slots work?
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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
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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?
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Why is it beneficial for the wing root to stall first?
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Define geometric and aerodynamic twist.
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What are the general steps in a stall recovery?
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