CONF iture, you really don't need to explain (to me) stall, thank you.
Alpha Floor engages itself before stalling
Negative. Alpha Floor engages to provide
performance.
Yes, Alpha Floor is no more than an automatic TOGA. TOGA is thrust, thrust provide performance.
Now,
why do Alpha Floor engages itself before the aircraft's speed decrease to Vs1g? The purpose is then to give max performance before the aircraft actually stalls on its current path.
To prevent stall or to exit stall, you need less AoA. We're all aware of that.
There is two way to obtain less AoA :
1/ lower the nose, less pitch will give you less AoA.
2/ if you can't lower the nose (at all / enough) (typical situation is you must maintain a path to avoid ground or another aircraft below), and
provided you're not already stalled, increase speed. Same path, more speed = less AoA.
Why do you refuse to see the relation thrust/AoA in my point 2?
I agree that one can not use this relationship to
recover from a stall, but it can be used to
prevent a stall if the trajectory is constrained.
I agree that the point 2 was far too much advertised in old procedures, now revised. I agree that you can't expect to survive all (approach to) stall conditions if you know only about that point 2.
Now, if you know both points, you may find the second one useful sometimes.