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Which of the following is correct to trim an aircraft at positive AOA?

Which of the following is correct to trim an aircraft at positive AOA? Correct Answer Cm0 > 0

To trim an aircraft at positive AOA, it is required that aircraft has positive value of zero lift moment coefficient. Hence, to trim aircraft at a positive angle of attack, aircraft should be designed with Cm0 positive i.e., Cm0>0. Negative value of Cm0 will not allow the aircraft to trim at positive AOA.

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