AirNiugini From Australia, joined Mar 2010, 152 posts, RR: 0 Posted (3 years 2 months 1 week 4 days 5 hours ago) and read 2477 times:
Sorry if this has been posted before.
There is a video on youtube which shows a AF747 performing a crosswind landing in Japan. On touch down only the right wings spoilers are deployed. Its quite noticeable as the aircraft looks like its having a bit of trouble keeping its balance.
I was wondering if anyone can shed any light on why this happens.
netjetsintl From United States of America, joined Jul 2009, 593 posts, RR: 0 Reply 2, posted (3 years 2 months 1 week 4 days 2 hours ago) and read 2248 times:
jetfuel is correct, the pilot had the airlerons into the wind for a crosswind landing. In order for the ground spoilers to deploy (in some aircraft) the main wheel has to be firmly on the and rotating, that's why sometimes you see the ground spoilers pop up on one side and 2-3 seconds later you see them come up on the other side
727forever From United States of America, joined Jan 2006, 783 posts, RR: 5 Reply 4, posted (3 years 2 months 1 week 4 days ago) and read 1944 times:
In the spoiler control system there is a mode that allows for the spoilers to be split. The spoilers have basically 3 different modes. Roll spoiler, Ground spoiler, and Speed Brake. In any of these modes they may be split if the yoke is turned past 10 degrees of deflection to aide in lateral control. This works in the air as well as on the ground.
After watching the video I would say that it was a text book landing in those kinds of winds. You don't aim for a greaser on those days. It is best to stick the upwind main and get the airplane on the ground rather than risk a lateral displacement in the flare from a gust while trying for that smooth landing. You will also note that after the nose wheel touches the elevators displace down to put additional pressure on the nosewheel. This aides in steering from the nosewheel.
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