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Find the degree of elevator float. Consider tail AOA is 2° and CHδe= -0.005, CHɑt=-0.0052.

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Find the degree of elevator float. Consider tail AOA is 2° and CHδe= -0.005, CHɑt=-0.0052.

(a) 2.08 deg

(b) 4

(c) 12

(d) 2.119

This question was addressed to me in a national level competition.

I would like to ask this question from Stick-Free Stability topic in portion Stability, Control, and Handling Qualities of Aircraft Design

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The correct option is (a) 2.08 deg

To explain: Given, tail AOA ɑ = 2°, CHδe = -0.005, CHɑt=-0.0052

Elevator float = -(CHɑt / CHδe)*ɑ = -(-0.0052/-0.005)*2 = -2.08°.

Considering only magnitude. Hence, 2.08°.

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