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Old 18th Feb 2014, 22:59
  #500 (permalink)  
CONF iture
 
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Originally Posted by HN39
Why is that? Please explain.
That's how the alpha protection has been designed.
At full back stick the elevators are all for the AoA control to maintain it at alpha max.

The airplane will start a phugoid trajectory, accelerating, climbing, decelerating and (possibly) descending, always at (close to) alphamax.
If you have seen those Airbus alpha max demo during air show, you probably have noticed the engine thrust variations, aimed at maintaining the vertical speed at zero. With full back stick the FCS is keeping the AoA at alpha max, and at the end of the pass the pilot applies full thrust still maintaining full back stick and the airplanes climbs away at alpha max. I haven't seen anyone 'descending' ... even temporarily.

"The only way to 'pull up' in that situation is to increase thrust to accelerate to a speed greater than Valphamax."
Your statement is erroneous.
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