Stick pusher as part of the stall protection system?
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Aspen, Colorado Canadair crash
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Originally posted by Evan View PostSo what kind of stall causes a pronounced pitch down like that rather than roll or flat descent?
If stall did at altitude that I think it might solve the stall problem.
Ok, let's clarify.
Forget about a tail stall. While a tail stall can cause a violent pitch down, I was not thinking of a tail stall.
If fact, I was thinking of no stall at all. That was someones' else comments in some others fora and aviation news site.
My point that the violent pitch down was not the result of a stall but an "active" pitching down command (like the pilot slumping on the yoke or the stabilizer being bent), and that, in fact, the pitch down was so violent that the only stall I can think of is an inverted stall (not because the plane flies upside down but because the AoA and Gs are negative) as a RESULT and NOT the CAUSE of violent pitch down.
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Originally posted by Vnav View PostStick pusher as part of the stall protection system?
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--- Defend what you say with arguments, not by imposing your credentials ---
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Originally posted by Gabriel View PostA tail stall, as you've said.
I agree.
Ok, let's clarify.
Forget about a tail stall. While a tail stall can cause a violent pitch down, I was not thinking of a tail stall.
If fact, I was thinking of no stall at all. That was someones' else comments in some others fora and aviation news site.
My point that the violent pitch down was not the result of a stall but an "active" pitching down command (like the pilot slumping on the yoke or the stabilizer being bent), and that, in fact, the pitch down was so violent that the only stall I can think of is an inverted stall (not because the plane flies upside down but because the AoA and Gs are negative) as a RESULT and NOT the CAUSE of violent pitch down.
Vnav has an interesting theory but I can't imagine the stick pusher being active at this altitude. That would be senseless as well.
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Originally posted by Evan View Post...I can't imagine the stick pusher being active at this altitude. That would be senseless as well.
I believe I once posted that I couldn't believe that someone would sit there with decaying airspeed and stall warnings and allow the aircraft to stall.
And a whole lot of people (and I mean a whole lot) couldn't imagine a that a critical, non electronic, control system would switch into "reverse mode" either.Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.
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Originally posted by ATLcrew View PostIt does not.
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--- Defend what you say with arguments, not by imposing your credentials ---
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Originally posted by Gabriel View PostOk, even then, a stick pusher activation would have lowered the nose a bit, barely enough to unstall. It would have neither lowered the nose so much nor lasted so long.
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Originally posted by Evan View PostWell, yes, that's the point. What we see on that video is beyond any sensible stick-pusher effect. It appears to be a either deliberate nose down command or pilot incapicitation or control surface failure.Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.
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Has anyone seen this video yet?
I found it on a spanish website:
http://terratv.terra.com/trs/video/7302343
A Former Airdisaster.Com Forum (senior member)....
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Originally posted by AVION1 View PostHas anyone seen this video yet?
I found it on a spanish website:
http://terratv.terra.com/trs/video/7302343
--- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
--- Defend what you say with arguments, not by imposing your credentials ---
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