Damn!! Emirates A380 Crosswind Landing...
#11
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#12
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As in, weight on wheels. I've seen a few accident investigation show nerdery, read NTSB reports, etc. and seen this weirdness of Buses reducing control inputs upon WoW. Now, I am not a Bus guy. But from what the video shows, it's "all is well", then the FO (I kid) plants the right main, with about 10 degrees of crab and 1000 fpm descent, then it just gets ugly. Is this flight control reduction really a thing? Bus guys, I'm looking for some insight. If I ever had my Super cub tell me I couldn't put full aileron deflection in, who knows all the ground loop stories I'd have.
Been a long time since I flew the Bus, but from what I remember: direct law happens at either 15 or 50 ft. It can make it a little challenging to de-crab, but not impossible.
The 320 could be landed wing low; I'm assuming the 380 can too, although there may be limited allowable bank to prevent dragging an engine (limit was 7 degrees in the 747).
WoW does NOT lock out your ability to maintain crosswind controls....you can maintain them throughout rollout (or takeoff, for that matter).
My guess is Emirates has a "max automation; min hand-flying" policy. Now: find yourself where the crosswind exceeds autoland limits, and practice your hand-flown piloting skills for the first time in a long time, under the most challenging conditions....
QED
#13
All was NOT well....this guy had a significant drift going on at time of touchdown. He had not transitioned to "wing low," and the fuselage and gear trucks were still pointed right. When the gear bit, it went in the direction it was pointed. Coupled with the preceding right drift, he saw himself headed for the weeds at an alarming rate. Everything that followed was an overreaction to it.
Been a long time since I flew the Bus, but from what I remember: direct law happens at either 15 or 50 ft. It can make it a little challenging to de-crab, but not impossible.
The 320 could be landed wing low; I'm assuming the 380 can too, although there may be limited allowable bank to prevent dragging an engine (limit was 7 degrees in the 747).
WoW does NOT lock out your ability to maintain crosswind controls....you can maintain them throughout rollout (or takeoff, for that matter).
My guess is Emirates has a "max automation; min hand-flying" policy. Now: find yourself where the crosswind exceeds autoland limits, and practice your hand-flown piloting skills for the first time in a long time, under the most challenging conditions....
QED
Been a long time since I flew the Bus, but from what I remember: direct law happens at either 15 or 50 ft. It can make it a little challenging to de-crab, but not impossible.
The 320 could be landed wing low; I'm assuming the 380 can too, although there may be limited allowable bank to prevent dragging an engine (limit was 7 degrees in the 747).
WoW does NOT lock out your ability to maintain crosswind controls....you can maintain them throughout rollout (or takeoff, for that matter).
My guess is Emirates has a "max automation; min hand-flying" policy. Now: find yourself where the crosswind exceeds autoland limits, and practice your hand-flown piloting skills for the first time in a long time, under the most challenging conditions....
QED
#15
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Just to clarify, there is no Direct Law on landing unless you had failures and were degraded. It's Normal Law - Flare Mode which happens at below 100 ft AGL. Below 50 ft, it'll memorize your pitch attitude and then do a slight nose down input which then gives you the feeling you have to pull back for a traditional flare technique. You do have direct deflection for elevator, but it doesn't mean you're in Direct Law.
#16
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Just to clarify, there is no Direct Law on landing unless you had failures and were degraded. It's Normal Law - Flare Mode which happens at below 100 ft AGL. Below 50 ft, it'll memorize your pitch attitude and then do a slight nose down input which then gives you the feeling you have to pull back for a traditional flare technique. You do have direct deflection for elevator, but it doesn't mean you're in Direct Law.
Thanks...been a while.
Question: doesn't roll change as well? IE, in Normal Law, stick deflection gives a roll RATE....I thought that changed in Flare mode so you could apply cross-controls a la conventional aircraft.
#17
I don't remember that being the case. I believe we had to kind of "pulse" the aileron input to drop the wing and avoid a continuous roll RATE upwind. But, it's been a while for me too.
#19
No, it's pure roll rate only thing that changes in the flare is pitch. But if you put it at a bank bangle it will stay there. For the 320 anyway, know nothing about 380 although I assume it has to be very similar.
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