This note is essentially a discussion of a paper, "Aeroelastic Stability of Lifting Surfaces in High-Density Fluids," by Henry, Dugundji, and Ashley [1].2 Additional viewpoints are presented which indicate that flutter phenomena are not unlikely in hydrodynamic operation; that the discrepancy between theory and experiment in a small range of values of the "mass ratio" is due to a transitional nature of flutter; and that either of two revisions to the theoretical oscillatory lift and moment expressions might provide better correlation with experiment.

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