MD80-83 series stall protection design philosophy question.
I am looking for somebody who has experience with the MD80 series of aircraft from a design perspective to answer a question of mine.
I am no longer current on the series, so the question is born out of curiosity, it concerns the automatic deployment of the slats from mid to fully extended position. For the discussion I will call this the auto slat function (I don’t remember if that is the correct terminology).
By design, if you had the slats extended to the mid range and then went into a high angle of attack the stall warning computer would detect the high AOA and drive the slats to the fully extended position, without any pilot input, it would do this automatically. However this “protection” was only available if the slats were already in the mid position; not from a clean wing. And that is my question; why was the auto slat function of the stall warning computer/protection on the McDonald MD80/83 series not designed to deploy from a clean wing?
For you “Magic Bus” drivers who may be reading. Does Airbus stall protection design automatically deploy, whatever high lift devices your wing may have, automatically from a clean wing to prevent a stall?
Looking forward to your responses,
Northbeach
(I never flew prior versions of the DC-9 type; only the MD80, so I don’t know the earlier history of this system.)