Determine the natural frequencies and mode shapes for the three degree-of freedom model of an airplane of

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Determine the natural frequencies and mode shapes for the three degree-of freedom model of an airplane of Chapter Problem 7.87. Assume \(m=3.5 \mathrm{~m}\).

Data From Chapter Problem 7.87:

Figure P7.87 illustrates a three degree-of-freedom model of an aircraft. A rigid fuselage is attached to two thin flexible wings. An engine is attached to each wing, but the wings themselves are of negligible mass. Derive the differential equations governing the motion of the system.

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