A STUDY OF WING FLUTTER n2 … X x Fiq. 9.—Rectangular two-spar airfoil spar-stiffness ratios for equal flexure For equal spar deflection under load F, For +x<n, y is always + and the spars flex equally in the same direction without torsion or surface warpage. For +z>n, and any —x, y is always — and the spars flex equally in…
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