Thanks
SNS3Guppy, as I don't plan on getting on any Tu154s or VC10s anytime soon, I can loosen my safety belt a couple of extra notches now in the low-cost cruise,
... or can I ? deep stall not just T tails you say ...
I note what you say about adequate warnings of buffet. But surely the main point about 'coffin corner', if as you say, your aircraft has the performance capability to take you there, and you let it, is that you are potentially boxed in a bit of a corner with potentially no speed range for manoeuvre (as with the U2 example in the extreme) ... frying pan or fire?
I guess what you are saying is that the graph plots of the onset of buffet define the corner, but that after onset there is a further unplotted area of 'forgiveness' in which recovery can be effected without severe upset?
Let me read it again ...