So again we are down to terminology.
I've never seen onset of buffet defined as "Certified Stall". It is an indication of APPROACH to stall, but still, the only definition of stall I know of (and certainly the one John Farley and others here where discussing) was ClMax.
Are you saying that AofA for ClMax changes with airspeed, and can you cite an explanation as to why?
ETA:- Actually, thinking about it, I think you are correct the Vs, as used for calculating other Vspeeds (Vref, Vcl Etc.) is onset of buffet.
Would still be interested in a cite as to why Critical AofA varies with Airspeed.
Last edited by Wizofoz; 5th July 2010 at 10:52.