PPRuNe Forums - View Single Post - MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures
Old 13th Dec 2019, 14:02
  #4457 (permalink)  
Takwis
 
Join Date: Mar 2019
Location: On the Ground
Posts: 155
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by MechEngr
My gut feeling (which isn't worth much and needs some data from Boeing to actually decide) is that the whole reason for this situation is that the contribution of MCAS in normal operations is slight and that it was entirely there for the control linearity requirement.Based on my gut, there isn't much to protect from as it does not do stall recovery only feel,
David P. Davies' solution to a slight pitch up into a stall in the 707 used only the elevator, not the much larger horizontal stab, and the solution was safe, effective, and benign. The MAX uses the stab, and trims forward for up to 10 seconds at a shot. That's at least an order of magnitude, maybe two, larger trim input than Davies'. I refuse to believe that a correction that large is "only feel."
Takwis is offline