Although probably not terribly relevant to the general discussion, at higher altitudes, Re comes into play a little ... in a manner similar to M .... and, if the pitch rate is high enough (70 odd degrees per second rings a bell in the back of the memory from a tech report I read quite some time ago) ... the dynamics can generate a significant stall angle excursion due to a vortex structure .... not very relevant to plank wings but a consideration with rotaries ...