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The zero-lift drag force will decrease with decrease respect to altitude.

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+1 vote
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in Aircraft Performance by (558k points)
The zero-lift drag force will decrease with decrease respect to altitude.

(a) True

(b) False

This question was posed to me in an interview.

The query is from Drag Force topic in section Aircraft Force Systems and the Equations of Motion of Aircraft Performance

1 Answer

+1 vote
by (553k points)
Correct answer is (b) False

The best I can explain: The zero-lift drag force will decrease with increase respect to altitude. This is due to atmospheric pressure varying with respect to altitude. Also the zero-lift drag force increases as the increase in atmospheric pressure.

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