The 737Max has an uncertifiable characteristic whereby elevator control force decreases as AoA increases towards stall. It is stated that this is the sole reason for MCAS.
The 737 has an Elevator Feel Computer whose purpose is to increase elevator control force as airspeed increases. The control forces are applied hydraulically and are separate from Speed Trim System whose function is to maintain control force neutral.
Is there a simple reason why the EFC could not have been provided with an AoA proportional input so that this existing system could compensate for the control force reversal?
MCAS as a solution is a brutal method of stick force compensation. When operating it almost makes the aircraft impossible to stall. One might wonder what the Max stall characteristics are like.
Or am I being too cycnical?
Last edited by ktcanuck; 29th Mar 2019 at 14:55.