Originally Posted by
Owain Glyndwr
Centaurus
Seems to me that the first sentence is not very well constructed. If you omit the word (stall) the rest makes good sense, and the second sentence refers specifically to high speed buffet with no mention of stall.
I think you are correct. It would be better constructed if it said " As the stalling angle of attack is approached, jet aircraft may experience buffeting whether at low or high altitudes. The low altitude stall buffet is caused by airflow separation as the aircraft approaches the stall angle of attack. The buffet at high altitudes, which is typically at a relatively high mach number, is caused by flow separation from the wings as occurs behind a shockwave. However, in both cases stall is based on angle of attack. That being said, at high mach numbers, for a given wing, the stalling angle of attack is lower."
Confirmation by John Farley would be nice.
Seems to explain why it is so much easier to get stickshaker in the sim at high altitude for an RA maneuver(or why during a stall recovery at high altitude, it is so easy to get a secondary stickshaker activation).