Originally Posted by
sAx_R54
Have been wondering what effect larger engine nacelles might have on MAC and/or CoG, when moved further forward on the airframe.....!
Another problem with these larger engines, is that they are more powerful, and I presume their center of thrust is lower on the airframe (because of the larger N1 fan diameter). Both of which result in a greater nose up moment when at full power, and therefore a greater risk of overpowering the elevator and leading to an uncontrolled pitch up. And therefore requiring a MCAS system to prevent this. Which was not fully thought through, and led to unforseen secondary failure modes.
Silver