A)
-2.09°
B)
-4.5°
C)
-4.74°
D)
3.5°

Correct Answer :  

Recently Updated in Aircraft Design Questions
Which of the following is not the type of aircraft dynamic mode?
A)
Phugoid
B)
Flap
C)
Dutch roll
D)
Lateral mode

Correct Answer : Option (B) :   Flap

Explanation : Flap is a high lift device. Flap is used to increase lift produced by the wing. Flaps are used to increase camber and overall surface area of the wing. This results in increased lift. Dutch roll, phugoid, lateral mode etc. are typical aircraft dynamic modes.

Which of the following is an example of longitudinal mode?
A)
Dutch
B)
Lateral
C)
Phugoid
D)
Aileron

Correct Answer : Option (C) :   Phugoid

Explanation : Phugoid mode is an example of longitudinal mode. Dutch and lateral mode are not example of longitudinal mode. Aileron is known as primary control surface. Aileron is used to control the aircraft rolling moment.

Find critical damping coefficient if damping ratio is 0.5 and damping coefficient is 1.1.
A)
2.2
B)
4.1
C)
4.9
D)
5.2

Correct Answer : Option (A) :   2.2

Explanation : Critical damping coefficient damping coefficient/ damping ratio 1.1/0.5 = 2.2.

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