XFSUgimpLB41X From United States of America, joined Aug 2000, 4297 posts, RR: 35
Reply 1, posted (14 years 5 months 3 weeks 4 days 12 hours ago) and read 4922 times:
The basic technique is... dip the upwind wing into the wind, and apply the opposite rudder (i.e. if the wind is coming from your right, dip the right wing and apply the left rudder). This is because: with a wind the plane crabs into it like a weather vane, apply opposite rudder straightens the airplane up. The upwind wing brings a horizontal lift component into the mix which compensates for the wind trying to drift the airplane off course. This correction is usually applied, and should be applied, on very short final or just before flare.
ERJpilot From , joined Dec 1969, posts, RR:
Reply 2, posted (14 years 5 months 3 weeks 4 days 4 hours ago) and read 4905 times:
You really should be asking a CFI these type of questions. This is for your own good since many Airliners.net members are Flight Simulator 2000 pilots who don't know a rat's ass about real-world flying.
Klaus From Germany, joined Jul 2001, 21629 posts, RR: 53
Reply 3, posted (14 years 5 months 3 weeks 4 days 4 hours ago) and read 4888 times:
I remember someone´s earlier post about the 747 having to land with level wings even under crosswind conditions due to limited engine ground clearance.
If that is true, how exactly does it work?
Are there specific modifications to the main landing gear so it adapts or at least withstands an angled touchdown?
How is the plane "straightened out" to the runway after that?
Zbeeblebrox74 From , joined Dec 1969, posts, RR:
Reply 4, posted (14 years 5 months 3 weeks 2 days 3 hours ago) and read 4889 times:
From what I was taught in my flight-training, there are two types of technique for a crosswind landing. The one that was described in detail by the first response to this query is called a 'sideslip' maneuver which works nice with most general aviation aircraft, and for most commercial jets in situations of a light crosswind.
In a more severe crosswind, the bank angle of the plane may indeed become too steep for sufficient engine clearance. The effect is beautifully illustrated in the following pic:
The alternative is to use a 'crab angle' which means keeping the wings relatively level and 'yawing' the plane into the wind using the rudder. This keeps it on a straight course with the runway, though you are effectively doing your final approach pointed slightly sideways, and unless you are a B-52 bomber, your gear is probably not designed to cope with this. So....right before touchdown, you'll release that rudder pressure and add opposite rudder if required to line the plane up with the runway again. This approach in particular takes quite a bit of practice to get it right!! Landing her partially sideways leads to the following scenario:
Some years ago I was sitting in the tail of a QF B767-300 on landing in Perth, Western Australia which is notorious for strong crosswinds. Right before touchdown, the captain must have given an almighty kick on the right rudder, as for a moment my body became one with the cabin wall. Thunk!!!! Ouch!!
I fly mostly light aircraft and I prefer the sideslip maneuver whenever possible. It is a pretty stable approach where the maingear on the lower wing will touch down before the one on the other side. I don't like doing last minute adjustments too much, but for the lads who fly the heavy metal it's all in a day's work
Zbeeblebrox74 From , joined Dec 1969, posts, RR:
Reply 7, posted (14 years 5 months 3 weeks 1 day 11 hours ago) and read 4797 times:
WOW! Those were some good sequences of pics. I've seen some of these pics individually on airliners.net, but never in their proper sequence. Tells a lot about the unbelievably robust construction of the 747.
Just wondering about the comments from the MAS captain who thought he'd carried out a 'reasonably normal landing' (I do suppose that any landing you can walk away from is a good one!). Where did he go to flight school?? That thing was rolling all over the place (no critique to MAS though, I've had some very pleasant flights with them )
Musang From United Kingdom, joined Apr 2001, 920 posts, RR: 6
Reply 10, posted (14 years 5 months 3 weeks 1 day 4 hours ago) and read 4779 times:
On the B-52 a gear crab angle is calculated and dialled in from the flight deck.
Do any other aircraft have this capability?
Many large transports are routinely landed in x-winds with the logitudinal axis not aligned withe runway, i.e. crabbed, which they can of course withstand. Once in contact, they would be yawed around with rudder to maintain the centreline.
A variation on this is to aim the trajectory (not the nose) a little upwind of the centreline, and rudder it straight just before touchdown. It starts to drift downwind immediately of course, but will land in a second or two so won't drift far.
Bear in mind that in the wing down method, the "cross-controls" you have in place to hold the slip must not be released on touchdown, but usually increased, as more control input is needed as the aircraft slows. One might reach the runway exit with full aileron deflection into wind and almost full rudder downwind, in strong x-winds.
A turboprop may require aileron inputs identical to those used on light aircraft in strong winds, even while taxiing under nosewheel steering.
FlyMIA From United States of America, joined Jun 2001, 7529 posts, RR: 7
Reply 11, posted (10 years 10 months 2 weeks 4 days 16 hours ago) and read 4687 times:
There are alot of videos of crosswind landings at flightlevel350.com
B767-400er has not posted in more than two years. This topic is from August 2001! What is wrong here. How did it let me respond to this topic?
[Edited 2005-03-30 05:03:45]
"It was just four of us on the flight deck, trying to do our job" (Captain Al Haynes)