Cross control on Airbus
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Greetings,
Theoratically you cannot cross the controls, however, like someone pointed out you can by ordering a roll, release the joy stick then apply opposite rudder, the problem is that there will be too much stress on the fin
Theoratically you cannot cross the controls, however, like someone pointed out you can by ordering a roll, release the joy stick then apply opposite rudder, the problem is that there will be too much stress on the fin
Last edited by kijangnim; 1st October 2008 at 16:50. Reason: typos
Joined: Mar 1999
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From: KDEN
If you're trying for a wing-down method crosswind landing you don't need hardly to cross control. Add downwind rudder and the upwind wing will miraculously and proportionally come down without pilot intervention. I don't know why it works, but it certainly seems to. Ask Toulouse 
Joined: Jan 2008
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From: Blighty (Nth. Downs)
Hi Aikon,
It may be that the control laws have been modified since I last flew the A320 in 2001, but I never experienced the automatic sideslip that Cardinal describes above.
See if this − and posts from many contributors on the same thread − make any sense:
http://www.pprune.org/tech-log/316096-lh-a320-rough-landing-hamburg-24.html#post3979423
I’m referring particularly to the paragraph “Crosswind Landing”. Prolonged flight in sideslip may not be practicable or desirable on FBW Airbuses, probably because of the roll-yaw coupling feature.
Chris
It may be that the control laws have been modified since I last flew the A320 in 2001, but I never experienced the automatic sideslip that Cardinal describes above.
See if this − and posts from many contributors on the same thread − make any sense:
http://www.pprune.org/tech-log/316096-lh-a320-rough-landing-hamburg-24.html#post3979423
I’m referring particularly to the paragraph “Crosswind Landing”. Prolonged flight in sideslip may not be practicable or desirable on FBW Airbuses, probably because of the roll-yaw coupling feature.
Chris
Joined: Jan 2003
Posts: 516
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From: Northampton
Hmm, I seem to recall Airbus changing certain regs and advisories following an accident involving crossed controls and a damaged tail fin? That's about all I can remember, can anybody shed more details?
Jack
Jack
Joined: Mar 2006
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From: Choroni, sometimes
Crosswind landings
The preferred technique is to use rudder to align the aircraft with the runway
heading during the flare while using lateral control to maintain the aircraft on the
runway center line. Routine use of into wind aileron is not recommended, because
sidestick deflection commands roll rate until touchdown.
In strong crosswind conditions, small amounts of lateral control may be used to
maintain wing level. This lateral stick input must be reduced to zero at first main
landing gear touchdown
http://www.aaib.dft.gov.uk/cms_resou...pdf_507757.pdf
The preferred technique is to use rudder to align the aircraft with the runway
heading during the flare while using lateral control to maintain the aircraft on the
runway center line. Routine use of into wind aileron is not recommended, because
sidestick deflection commands roll rate until touchdown.
In strong crosswind conditions, small amounts of lateral control may be used to
maintain wing level. This lateral stick input must be reduced to zero at first main
landing gear touchdown
http://www.aaib.dft.gov.uk/cms_resou...pdf_507757.pdf
Thread Starter
Joined: Aug 2005
Posts: 37
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From: Malaysia
Thanks guys. It is much clearer to me now. This is such a wonderful forum where a lot can be learned from each other.
And a special thanks to Chris for pointing me to an excellent thread with so much info.
Well done guys!
And a special thanks to Chris for pointing me to an excellent thread with so much info.
Well done guys!
