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Autoland In Crosswinds Situations Question  
User currently offlineJulianUK From United Kingdom, joined Apr 2006, 105 posts, RR: 0
Posted (7 years 11 months 3 weeks 1 day 7 hours ago) and read 4648 times:

How good is modern autoland in crosswinds? Will it do wing down into the wind itself or does it need some assistance from the person up front? Is there any constraint on crosswind landings with autoland in use? for example if it is a gusty crosswind with sudden changes in wind speed can it react well? just interested in different aircraft types and their characeteristics.

J

8 replies: All unread, jump to last
 
User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2254 posts, RR: 16
Reply 1, posted (7 years 11 months 3 weeks 1 day 5 hours ago) and read 4630 times:

MD-11 autoland x-wind limits...15kts; for CATII/III...10kts.

It does a very good job on it's own.


User currently offlineLongHauler From Canada, joined Mar 2004, 4760 posts, RR: 43
Reply 2, posted (7 years 11 months 3 weeks 1 day 4 hours ago) and read 4601 times:

A320/A321/A319 crosswind limits are 15Kts for all autolands including CatII and CATIII Dual, (no DH).

It does a crosswind landing just like you or me. One wing down, maintain lateral orientation with rudder.

Very recently we are now authorized to do single engine CatIII, with up to a 15kt crosswind. The only restriction is on the amount of reverse thrust you use ... it varies with the crosswind.



Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
User currently offline411A From United States of America, joined Nov 2001, 1826 posts, RR: 8
Reply 3, posted (7 years 11 months 1 week 3 days 17 hours ago) and read 4340 times:

L1011.

Crosswind restriction during automatic approach/landings (autolands) is 35 knots, on dry runways.
25 knots if wet.
15 knots if CATIII.


User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 4, posted (7 years 11 months 1 week 3 days 17 hours ago) and read 4340 times:
AIRLINERS.NET CREW
HEAD DATABASE EDITOR




Quoting 411A (Reply 3):
Crosswind restriction during automatic approach/landings (autolands) is 35 knots, on dry runways.

Wow.




2H4





Intentionally Left Blank
User currently offlineHighFlyer9790 From United States of America, joined Jul 2005, 1241 posts, RR: 0
Reply 5, posted (7 years 11 months 1 week 3 days 17 hours ago) and read 4336 times:

Quoting LongHauler (Reply 2):
The only restriction is on the amount of reverse thrust you use

doesnt auto throttle automatically deploy the reversers? how much, if anything, is done by the pilots in an autoland besides monitoring, assuming they do not disconnect the auto pilot at DH in a CAT I or II?



121
User currently offlineEssentialPowr From United States of America, joined Sep 2000, 1820 posts, RR: 2
Reply 6, posted (7 years 11 months 1 week 3 days 16 hours ago) and read 4330 times:

On the 737s (NGs and classics), A/Ts disconnect 2 sec after touchdown, so reverse thrust is manual.

User currently offlineCX flyboy From Hong Kong, joined Dec 1999, 6533 posts, RR: 55
Reply 7, posted (7 years 11 months 1 week 3 days 13 hours ago) and read 4310 times:

In the 777-200 and 777-300, autoland crosswind limits are the same as manual landings, so 38kts crosswind on a dry runway, 20kts for slush/water/snow, and 15kts for ice and compact snow.

The exception is a 25kt autoland crosswind limit for LWMO landings.

Autoland is great for single engined landings too.


User currently offlineWing From Turkey, joined Oct 2000, 1555 posts, RR: 24
Reply 8, posted (7 years 11 months 1 week 3 days 9 hours ago) and read 4275 times:

Quoting HighFlyer9790 (Reply 5):
doesnt auto throttle automatically deploy the reversers? how much, if anything, is done by the pilots in an autoland besides monitoring, assuming they do not disconnect the auto pilot at DH in a CAT I or II?

Normally all landing calculations are done without the reverse thrust.And usage of reverse thrust varies between the airport requirements(noise issues),crosswing requirements and operational requirements of the airplane and the runway.

Reverse thrust is not operated by the autoland system nor its a part of it.Pilots choose the amount of the reverse thrust and depending on the conditions.

Just to clearify something here.You can make an autoland on a CAT I day,so you don't have to disengage the AP on the DH.But on the other hand you may compleate the landing on a CAT II approach with a manual landing after the DH(if you have the visual ques)



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