PL080 - Principles of Flight PPL(A)
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Critical flutter speed is the speed for which:
Which axis is called normal axis?
Which axis of the coordinate system is called the longitudinal axis?
Which axis is called the lateral axis?
Which devices are not lift augmentation wing devices?
What is a potential energy?
The curve representing the shape of wings as seen from above is:
The line connecting the most front points of aerofoil is:
The line connecting the most rear points of aerofoil is:
The line drawn equidistant between the upper and lower surfaces of an aerofoil is called:
Flight takes place on the angle of attack, for which the coefficient of drag "Cx" is the minimum. As a result of a small increase in angle of attack:
"Frise" ailerons-type are used to:
"Frise" ailerons-type are used to:
The never exceed speed "VNE"is:
Maximum effeciency of profile:
The maximum speed of flight in turbulent air is:
The maximum speed at which you can still use the full controls deflection without exceeding the maximum airframe load is determined as:
Lift augmentation is used to:
The minimum value of Cx coefficient we can obtain for the angle of attack equal 0°.
Aerodynamic momentum measured from the aerodynamic center in flight speed range:
Aileron adverse yaw is because:
On the lower surface of the wing air flow is deflected towards wing tip:
On the upper surface of the wing air flow is deflected towards wing root:
At what altitude, density of the air in ISA atmosphere is equal to one-fourth of the ISA density at sea level?
At what altitude, density of the air in ISA atmosphere is equal to the ISA density at sea level?
At what altitude, density of the air in ISA atmosphere is equal to half of the ISA density at sea level?
On what altitude pressure is equal to half of pressure at sea level in ISA atmosphere?
Air flow around the wing is deflected towards:
The maximum distance between the upper and lower surfaces of the aerofoil is:
The highest speed at which you can fly in calm air is:
Momentum relative to normal, which arises from the aileron deflection by the same angle in opposite directions is called:
Dutch roll is one of the types of instability:
Spiral instability is one of types of instability:
Slightly increase of the angle of attack in range just below maximum angle of attack causes:
Wing icing causes:
Airframe rotation around OX axis is realized through:
Airframe rotation around OY axis is realized through:
Airframe rotation around OZ axis is realized through:
Induced drag increases when:
Induced drag increases when:
