Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
X-wind, White Line And Setting Straight  
User currently offlineSJC-Alien From United States of America, joined Jul 1999, 919 posts, RR: 0
Posted (16 years 1 week 6 days 19 hours ago) and read 1479 times:

I showed a photo I took of an AirNew Zealand 747-200 landing on runway 06L at LAX in 1990 to someone that supposedly knows aircraft operations. In the photo, due to a strong x-wind from the south, the 747 had landed slightly off center to the right of the pavement, and was 'crab-ed' with the nose to the right off centerline to about, hmmm what I'd say about, 10-12 degrees off center, but I'm no expert.
The friend said that the pilot can get in serious trouble from Airline management for being off center so much, and 'crab-ed' over that far. I said it was on the runway and in one piece, what did it matter. He said the plane could have gone off the runway. I figured the pilot would just kick the rudder after touchdown and straighten it out. I need a clue...whats the normal proceedure on placement on the runway...windy or not?

SJC Alien

7 replies: All unread, jump to last
User currently offlineLandgreen From Canada, joined Jun 1999, 36 posts, RR: 0
Reply 1, posted (16 years 1 week 6 days 19 hours ago) and read 1408 times:

I'm not sure about the 747 in particular, but coming from an operations person myself, the proper crosswind landing technique is to eliminate the crab prior to touchdown. This can be done either in the flare or as our manuals say for the DC-9 A319/320 B767 can be done below 300ft AGL. On wet or slippery runways they advise to land nose slightly upwind of the centerline and touchdown with crab remaining. After you have seen a number of crosswind landings you will see that they are not all executed perfectly and on centerline.

User currently offlineRobin27 From , joined Dec 1969, posts, RR:
Reply 2, posted (16 years 1 week 6 days 18 hours ago) and read 1403 times:

The 747 undercarriage is designed to enable the aircraft to touch down crabbed by quite a serious number of degrees. I understand that if a wing is kept low to counteract a crosswind on a 747, the engines risk grounding, so the aircraft is crabbed and kicked straight after touchdown.

User currently offlineHP-873 From , joined Dec 1969, posts, RR:
Reply 3, posted (16 years 1 week 6 days 11 hours ago) and read 1393 times:

In my experience, aircraft watching, and little reading, the most used "style" if you want to call it, is on final approach on a crab angle and when at the PIC's(pilot-in-command's) discretion, touchdown with the airplane on a slip (aligning the airplane with the runway), the main landing gear which the wind is coming from is first to kiss mother earth then the other and nose wheel last, keep aileron pressure to the side wind is coming from, all the way until the aircraft clears the runway. On the slip the PIC keeps airplane at that bank angle with ailerons while using opposite rudder input. At first is uncomfortable but when you get it, it's sweet.
Like said before the 747 is designed to tolerate landings AT the crab angle, because landing on a slip with too much bank angle will not be good for the engine's health or the pilot's status. I don't remember clearly but some airplane's main gear (one) moves to compensate the crab angle (somewhat aligns with the runway).

User currently offlineSJC-Alien From United States of America, joined Jul 1999, 919 posts, RR: 0
Reply 4, posted (16 years 1 week 6 days 10 hours ago) and read 1379 times:

Yes,,good addition, I have seen this on 747 at LAX before and after this event, now that you mention it. Though the 727 are famous for X-wind landings, the 747 do seem to have a tough time of it, and I've seen and filmed some pretty rough landings at LAX, because we can see the airport at a different angle than say, SFO.

I'm just glad it isn't me flying that puppy.!! Total repect here, boys and girls.

SJC Alien

User currently offlineRobin27 From , joined Dec 1969, posts, RR:
Reply 5, posted (16 years 1 week 5 days 19 hours ago) and read 1359 times:

Check out this site for a some spectacular 747 landings.


User currently offlinePanman From Trinidad and Tobago, joined Aug 1999, 790 posts, RR: 0
Reply 6, posted (16 years 1 week 5 days 19 hours ago) and read 1357 times:

This way is easier than cutting and pasting.

Click on the link etc.



User currently offlineRobin27 From , joined Dec 1969, posts, RR:
Reply 7, posted (16 years 1 week 4 days 20 hours ago) and read 1337 times:

Thanks for that, I've not included a link before. Know now though.

Top Of Page
Forum Index

Reply To This Topic X-wind, White Line And Setting Straight
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
Photo I.D. And On-Line Check In posted Mon Jan 22 2007 11:31:12 by Thai744
Runway Condition And X-wind posted Thu Jan 19 2006 13:12:39 by Redcordes
Wind And Cruising Levels - Data From Aircraft. posted Sat Jan 7 2006 19:29:18 by Julesmusician
Flaps Setting And FMC Speed Details - The Choices posted Sat Dec 24 2005 18:58:18 by Julesmusician
Keeping The Plane Straight On Takeoff And Landing? posted Thu Nov 10 2005 03:29:34 by SuseJ772
Calculating Wind Speed And Direction posted Fri May 13 2005 21:02:54 by TimRees
Engine Run-up And Wind Direction. posted Tue May 4 2004 01:04:06 by Dakotasport
Whats The White Jaggered Line For posted Mon Jan 19 2004 15:25:28 by HAWK21M
Alcohol And Flying - Where To Draw The Line? posted Wed Nov 12 2003 14:26:09 by Gordonsmall
Line Trainers, TRIs And TREs posted Sat May 3 2003 23:13:26 by Donder10

Sponsor Message:
Printer friendly format