MAE2_Lecture15

MAE2_Lecture15 - Structures and Materials Turning Flight...

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Structures and Materials Turning Flight V-n Diagrams Lift Distribution Stress and Strain Materials Weight Estimation MAE 2
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2 MAE 2 Turning Flight L cos = W L = lift W = weight V = velocity = bank angle = heading angle mV d dt = L sin A level turn implies that the airplane flight path changes, but is still restricted to a horizontal plane. By banking the wings, the lift vector is tilted toward the center of the turn. Vertical: Horizontal: W L Airplane is flying into page during a right turn (right wing down) Equations of Motion
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3 MAE 2 Load Factor Define load factor as the ratio of lift to weight. L cos = W Vertical: cos = 1 n n L W n = load factor sin = 1 cos 2 = 1 1 n 2 = n 2 1 n 2
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4 MAE 2 Turn Rate and Radius Turn rate is the rate at which the airplane changes (compass) heading. ≡ d dt mV d dt = L sin Horizontal: mV = mg L W sin = turn rate R = turn radius = g V n sin = g V n n 2 1 n 2 = g V n 2 1 V = R R = V 2 g n 2 1
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5 MAE 2 Maximum Turn Rate The best possible turning performance results in a maximum turn rate and a
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MAE2_Lecture15 - Structures and Materials Turning Flight...

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