737 max nacelle lift generation
Is it because as the aircraft starts to lose pItch up authority with elevators
Has the Shaker Pusher lost its efficacy?
If elevators are out of the solution lacking authority to quickly lower AoA, isn't the jet already LOC?
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Folks,
There is an element of pointless going around in circles now evident in this thread.
Perhaps keep in mind that several of the participants here really do know what they are talking about. As this is an anonymous site, I only know who a few of the posters are. However, of those whom I do know, we include several very experienced experimental/certification test pilots, very experienced industry design/certification engineers, very experienced OEM design/certification engineers, very experienced MIL/CIV heavy aircraft pilots, etc. Within that body of technical professional folks, there probably is a smattering of knowledge of the matters being discussed.
Others, in technical ignorance, are missing the point and acting a bit like a dog with a bone. For the latter, it may be of value to download an appropriate techo book from the net (not your typical pilot explanation) and have a read through what longitudinal static stability is about. LSS is what the MCAS animal is all about, so far as I can see.
The matter of turning airflow requiring pressure gradients and giving rise to forces is not in question - it has been known and well understood for donkey's years. Whether you wish to accept it or not, the nacelle forward lip region can generate an upwards force, increasing with increasing alpha and certainly can present some handling problems if those forces be excessive in the overall scheme of things. That force isn't the be all and end all. Rather it contributes to the overall set of forces (ie pitching moments) existing and it is the net resulting force which may or may not present a problem.
The aim is to learn rather than have mindless head-butting arguments. Those animals with big horns seem to do that much better than we puny human folk can do ?
For the record, we don't send folks into the sin bin just for having a view, even if that view might be tedious, annoying, whatever. The sin bin only becomes a consideration if the site rules are blatantly breached or the common tenets of polite interaction are abused.
There is an element of pointless going around in circles now evident in this thread.
Perhaps keep in mind that several of the participants here really do know what they are talking about. As this is an anonymous site, I only know who a few of the posters are. However, of those whom I do know, we include several very experienced experimental/certification test pilots, very experienced industry design/certification engineers, very experienced OEM design/certification engineers, very experienced MIL/CIV heavy aircraft pilots, etc. Within that body of technical professional folks, there probably is a smattering of knowledge of the matters being discussed.
Others, in technical ignorance, are missing the point and acting a bit like a dog with a bone. For the latter, it may be of value to download an appropriate techo book from the net (not your typical pilot explanation) and have a read through what longitudinal static stability is about. LSS is what the MCAS animal is all about, so far as I can see.
The matter of turning airflow requiring pressure gradients and giving rise to forces is not in question - it has been known and well understood for donkey's years. Whether you wish to accept it or not, the nacelle forward lip region can generate an upwards force, increasing with increasing alpha and certainly can present some handling problems if those forces be excessive in the overall scheme of things. That force isn't the be all and end all. Rather it contributes to the overall set of forces (ie pitching moments) existing and it is the net resulting force which may or may not present a problem.
The aim is to learn rather than have mindless head-butting arguments. Those animals with big horns seem to do that much better than we puny human folk can do ?
For the record, we don't send folks into the sin bin just for having a view, even if that view might be tedious, annoying, whatever. The sin bin only becomes a consideration if the site rules are blatantly breached or the common tenets of polite interaction are abused.
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