PPRuNe Forums - View Single Post - Boeing 737 Max Software Fixes Due to Lion Air Crash Delayed
Old 21st Mar 2019, 11:45
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ecto1
 
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Great video, although before you spread it, I think it has some important details wrong:

- He thinks the problem MCAS try to solve is that thrust produces pitch-up moment. It's not, it is a surface (nacelles) which produces no lift at low AOA but some at high AOA. If say surface is not at the center of gravity longitudinally, say it's forward from it, this added lift will create a nose up moment that wasn't there at low AOA, and as long as it's not "compensated" by anything extra in the rear will reduce the pull force at the controls. Additionally, in frontal view, the nacelles drag COP also raises so that reduces the nose down moment induced by it (more than with the previous engines position).

- He said MCAS advances throttles to full.
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