Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

Can AP be engaged when sidestick or pedals out of neutral position on Airbus?

Wikiposts
Search
Tech Log The very best in practical technical discussion on the web

Can AP be engaged when sidestick or pedals out of neutral position on Airbus?

Thread Tools
 
Search this Thread
 
Old 1st Oct 2010, 16:38
  #1 (permalink)  
Thread Starter
 
Join Date: Jun 2010
Location: Shanghai, China
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Can AP be engaged when sidestick or pedals out of neutral position on Airbus?

I know that overriding the sidestick or rudder pedals when AP engaged could cause AP disconnection. But if the sidestick or rudder pedals already deflects without AP engagement, the AP can be engaged by pushing the AP button on FCU? If so, how long will AP really control the A/C to mitigate the transient?

thx
YaYoSky is offline  
Old 1st Oct 2010, 23:41
  #2 (permalink)  
 
Join Date: Oct 2006
Location: Gone Flying...
Age: 63
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Yes. In the FBW Airbus aircraft you can engage the AP with sidestick or pedals out of the neutral position, as long as you "let the controls" come back to neutral. The AP will take-over almost immediately but will fly either to the selected course of action active on the FCU or (if FD's are off) it will revert to basic mode HDG/VS.
aguadalte is offline  
Old 2nd Oct 2010, 04:44
  #3 (permalink)  
Thread Starter
 
Join Date: Jun 2010
Location: Shanghai, China
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Quote:
Yes. In the FBW Airbus aircraft you can engage the AP with sidestick or pedals out of the neutral position, as long as you "let the controls" come back to neutral.
aguadalte, thank you.
Do you mean that AP can be engaged but not control the A/C with controls out of neutral position and the AP will be actually work after the controls back to neutral?
YaYoSky is offline  
Old 2nd Oct 2010, 04:55
  #4 (permalink)  
 
Join Date: Dec 2007
Location: Changi
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
Hi,

It depends really. If the contols are out of the required envelope, the AP will engage BUT it will actually trip after a few secs. Happened a few times in a simulator, when we were out of trim on eng out approaches and go-arounds.

For us, the cue is waiting for the "click" to see if the AP has taken over control fully. The "click" is actually the locking device used to lokc the sidestick in position.

Hope this helps,

Cheers,
lion-g
lion-g is offline  
Old 2nd Oct 2010, 06:39
  #5 (permalink)  
 
Join Date: Jun 2010
Location: Brisbane, Australia
Posts: 304
Likes: 0
Received 0 Likes on 0 Posts
Now I'm confused..as a non AB person...

With the AB, are you not flying with the autopilot ALL the time...it's simply a matter of manual (sidestick) electronic input, or else fully automated control, with something resembling VNAV and LNAV directing progress.

cheers
EW73 is offline  
Old 2nd Oct 2010, 09:07
  #6 (permalink)  
Moderator
 
Join Date: Apr 2004
Location: Rome
Posts: 792
Likes: 0
Received 0 Likes on 0 Posts
Hi,

You can be flying either manually or with the AP on. It is exactly like in other airplanes. And like in other airplanes, before inserting the autopilot you must have a well trimmed airplane, like in case of an engine failure during takeoff. Just as in a twin cessna you keep control of the airplane, give correct trim input and then insert the autopilot which will continue to do your job, but it is not your substitute.

Bye
I-2021 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.