Originally Posted by
ahwalk01
Agreed, Boeing or airbus won't release the flight test data. So your guess is as good as mine as to how representative the stall appears in a sim.
Well, it's more a case of not having the data to 'release'. Flight testing at the point of stall is quite limited in Part 25 certification testing, being largely restricted to demonstrating 'set-piece' stalls under various conditions. There is no requirement to demonstrate stall characteristics with, for example, significant sideslip. There is no intentional testing beyond the stall.
So, if you wanted data to support a simulator model that gave a correct representation of aircraft behaviour regardless of conditions and pilot technique, including beyond the stall, a huge amount of (high risk) testing that would be needed with all possible pilot control activity, in all configurations, covering the full range of load factors, Mach numbers, sideslip values, weights and cg positions. In the case of the AoA-protected aircraft, this would have to be repeated in the various degraded FCS modes.
The emphasis is, quite rightly, on avoiding the stall!