Sink rate can be used to __________

estimate only wing loading

calculate weight to thrust ratio

determine and estimate takeoff gross weight

determine the time a glider may remain in the air

Correct Answer : determine the time a glider may remain in the air

Explanation : The time a glider may remain in the air can be determined by using the sink rate. Sink rate is the product of aircraft velocity and sine of the glide angle. It is the vertical velocity.

Recently Updated in Aircraft Design Questions

If stall speed is 120 knots then, find average velocity at flare.

110.25

125.4

137.5

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.

12 ft

20 m

26.4 unit

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.

90.90

100

200

223

Correct Answer : Option (A) : 90.90

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

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