BOAC - agreed, it a localised acceleration of the airflow to M 1.0, but at 0.61 surely that is unlikely. Standard B757 cruise is0.80 with MMo at 0.84, and we still experience no high speed buffet. However, I do not think this about pulling G at altitude.
JF. Excuse my apparent ignorance, but if you are pulling harder and harder in you r 0.80 spiral dive, are you not increasing your wing loading. Stall speed, being directly related to effective weight, will increase with increased weight. How far adrift am I?
Unfortunately, I am still baffled by the HTBJ reference I quoted earlier which states that the EAS stall speed increases with altitude. EAS means nothing to do with intrument corrections, position error, or compressibility error; this is the stuff that is important to the aerodynamicists - or at least that's what me Mum told me! So...why does it increase with altitude?
Guys, if you have already explained it and I have not cottoned on please excuse me and send me to back of the class , but I really am curious about this one.