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737 MAX 8 and 9: Grounded
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<blockquote data-quote="Redtag" data-source="post: 3995156" data-attributes="member: 70933"><p>I am not an expert on airliners just a lowly rusty weekend warrior with a interest in airliners</p><p></p><p>MCAS is not really AI or intended to replace pilots, the system was needed because of the tendency of this plane to pitch nose up when power is applied quickly. That problem is caused by the 737 being designed in the 1960s was not designed for modern large diameter turbofan engines. So in order to fit these engines they had to mounted much more forward and higher on the wing than ideal. </p><p></p><p>Boeing had a problem, the 737 with LEAP engines now known as the max would not pass certification as is since control forces to keep the nose down in high power high AOA situations was beyond certification limits. Their solution was MCAS.. </p><p></p><p>[MEDIA=youtube]sEXTBZ89kyQ[/MEDIA]</p><p></p><p>Boeing should have stuck with their initial plan and went with a new 737 replacement designed from the ground up but they succumbed to pressure from a few key customers, Southwest being the most vocal, that wanted a competitor to the a320NEO now and wanted one that would operate under the same type rating as the 737NGs.</p><p></p><p></p><p>Oh, one last thing the A320 that flew into the trees was not attempting an auto land. That was Air France 296 a special flight meant to show off the capabilities of their newest plane. It was supposed to do a low pass at 100ft and the pilots dropped to 30ft saw the tree line went full power but the plane was in Alpha floor protection intended to keep the plane from stalling and limited the ability of the pilots to climb.</p><p></p><p>Lots of debate over that accident at the time.. sure a conventional airliner probably would have cleared the initial tree line but then may have dropped a wing and spun in as it stalled trying to climb away.</p></blockquote><p></p>
[QUOTE="Redtag, post: 3995156, member: 70933"] I am not an expert on airliners just a lowly rusty weekend warrior with a interest in airliners MCAS is not really AI or intended to replace pilots, the system was needed because of the tendency of this plane to pitch nose up when power is applied quickly. That problem is caused by the 737 being designed in the 1960s was not designed for modern large diameter turbofan engines. So in order to fit these engines they had to mounted much more forward and higher on the wing than ideal. Boeing had a problem, the 737 with LEAP engines now known as the max would not pass certification as is since control forces to keep the nose down in high power high AOA situations was beyond certification limits. Their solution was MCAS.. [MEDIA=youtube]sEXTBZ89kyQ[/MEDIA] Boeing should have stuck with their initial plan and went with a new 737 replacement designed from the ground up but they succumbed to pressure from a few key customers, Southwest being the most vocal, that wanted a competitor to the a320NEO now and wanted one that would operate under the same type rating as the 737NGs. Oh, one last thing the A320 that flew into the trees was not attempting an auto land. That was Air France 296 a special flight meant to show off the capabilities of their newest plane. It was supposed to do a low pass at 100ft and the pilots dropped to 30ft saw the tree line went full power but the plane was in Alpha floor protection intended to keep the plane from stalling and limited the ability of the pilots to climb. Lots of debate over that accident at the time.. sure a conventional airliner probably would have cleared the initial tree line but then may have dropped a wing and spun in as it stalled trying to climb away. [/QUOTE]
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