Graphical representation of sink rate of sailplane is called __________

A)
drag polar wing
B)
lift curve of wing
C)
typical speed polar
D)
propulsion systems

Correct Answer :   typical speed polar

Explanation : The graphical representation of sink rate for sailplane is called speed polar. Speed polar is also known as hodograph. Drag polar is graphical representation of drag characteristics. Lift curve is used to provide relationship between lift and angle of attack.

Recently Updated in Aircraft Design Questions
If stall speed is 120 knots then, find average velocity at flare.
A)
110.25
B)
125.4
C)
137.5
D)
147.6

Correct Answer : Option (D) :   147.6

Explanation : Average velocity at Flare = 1.23*stall speed = 1.23*120 = 147.6 knots.

Find the approach speed for military aircraft. Considered stall speed is 22unit.
A)
12 ft
B)
20 m
C)
26.4 unit
D)
45 unit

Correct Answer : Option (C) :   26.4 unit

Explanation : For military aircraft, Approach speed = 1.2*stall speed = 1.2*22 = 26.4 unit.

For military aircraft touchdown speed is 100 knots then, approximate value of stall speed.
A)
90.90
B)
100
C)
200
D)
223

Correct Answer : Option (A) :   90.90

Explanation : Stall speed = touchdown speed/1.1 = 100/1.1 = 90.90.

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