Figure 4: Finite element model of the Morane-Saulnier Paris aircraft. Mode Freq. Mode Freq. (Hz) (Hz) 1 0.0936 13 21.2193 2 0.7260 14 22.7619 3 0.9606 15 23.6525 4 1.2118 16 25.8667 5 1.2153 17 28.2679 6 1.7951 18 29.3309 7 2.1072 19 31.0847 8 2.5157 20 34.9151 9 3.5736 21 39.5169 10 8.1913 22 40.8516 11 9.8644 23 47.3547 12 16.1790 24 52.1404 TABLE 2: Natural frequencies of the linear finite element model of the Paris aircraft. 231
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