Old 11th Feb 2019, 17:56
  #15 (permalink)  
jimtx
 
Join Date: Sep 2018
Location: Laredo, TX
Posts: 91
Originally Posted by FCeng84 View Post
MCAS is flaps up only. Furthermore, it is not needed to provide anticipatory stabilizer trim in order to maintain sufficient pitch control power via the column/elevator. If column/elevator were not able to generate enough pitch control power without moving the stabilizer other than to provide long term pitch trim that would constitute a certification issue that could not be addressed via either stabilizer trim or a stick pusher.

The certification issue that is addressed by MCAS is that the inherent pitch up encountered at high AOA, aft CG, flaps up is such that increased AOA can require relaxing of the column pull needed to initiate the maneuver. Requirements call for stick force needed to increase AOA up to stick shaker must not drop with increasing AOA.
That would be the stick force felt by a manual handling pilot, right. The autopilot does not care about stick force and will put the attitude where it needs to be regardless. Then again, wouldn't that be how we would hand fly also.
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