Sorry but there is not a stagnation 'point' in 3D flow. A cross-section of 3D flow will show a point, but overall on the paddle itself, it is a line. The shifting of the stagnation line you describe is exactly the behavior that causes flutter. I think we're talking about the same phenomenon, and having a misunderstanding re: terminology, which is understandable for internet discourse. We should really be standing at the blackboard (with a beer?), and all this would be a lot more productive.
Sport Cases (Electronics)
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