FOR all stiffness ratios, there is clearly a marked increase of critical speed when the centre of inertia is as far forward as the flexural centre.
Frazer, R.A. (1929), "Aeroplane Wing Flutter: A Detailed Discussion of Measures for the Avoidance of Unstable Oscillation of Aeroplane Wings", Aircraft Engineering and Aerospace Technology, Vol. 1 No. 4, pp. 138-145. https://doi.org/10.1108/eb029138
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