Having read just about every post on this thread, I can understand the frustrations felt about those who think they know, by those who actually do. However: restricting participation/visibility to the latter - as seems to have been suggested - could close out an unknown number of infinitely less qualified people such as myself, who have in fact learnt a lot from this debate while also having the sense to keep the lip zipped. I say this as an amateur GA pilot & gliding instructor, and newcomer to the PPPrune scene, who has over many years had the misfortune to be an eyewitness to the deaths and serious injuries of several friends in stall/spin accidents, and it would sadden me to be denied the opportunity to learn from the wealth of knowledge and experience embedded in this thread, if only as a silent onlooker. (And yes, I fully appreciate the quantum differences between 744's and K13's/Super Cubs, but the fundamentals of physics and aerodynamics are still applicable).