If power required at sea level altitude is 2005W then, determine power required at altitude at which density ratio is 0.9.

A)
2.113KW
B)
500W
C)
2354W
D)
211115W

Correct Answer :   2.113KW

Explanation : Power at altitude = Sea-level power*[1/density ratio]0.5
= 2005*[1/0.9]0.5 = 2113.45W = 2.113KW.

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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