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

A380 spoilers?

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

A380 spoilers?

Old 3rd Mar 2010, 13:41
  #1 (permalink)  
Thread Starter
Join Date: Mar 2005
Location: UK
Posts: 524
A380 spoilers?

I've noticed on the A380, that when the flaps retract after landing there is a commanded rise of the spoilers by a couple of degrees. I can't work out what purpose this serves as the same doesn't happen when the flaps retract after takeoff? I've never come across this on any other type before.

You'll see an example of this if you scrub to 6:40 on THIS VIDEO
TotalBeginner is offline  
Old 3rd Mar 2010, 19:40
  #2 (permalink)  
Join Date: May 2009
Location: UK
Age: 37
Posts: 39
Maybe so that they don't scratch the paint. On tekeoff the don't care about the paint
Dimitris is offline  
Old 3rd Mar 2010, 19:54
  #3 (permalink)  
Join Date: Oct 2008
Location: Above & Beyond
Posts: 323
From the video the flaps retract quite a bit. Im guessing that the spoilers will scratch the surfact of the flaps which causes more drag and also would you want scratches on the upper surface of the wings ?

As I said its just going off the video you have supplied.
punk666 is offline  
Old 3rd Mar 2010, 20:16
  #4 (permalink)  

Join Date: May 2001
Location: Some hole
Posts: 1,928
Maybe incase they get some ice on them to avoid damage.
swh is offline  
Old 4th Mar 2010, 07:09
  #5 (permalink)  
Join Date: Aug 2008
Location: Here!
Age: 37
Posts: 5
When the flaps are in other config than 0 is because the plane needs more lift, in order to help that or make it more efficient, the spoilers drop a couple of degrees to give the wing a more curved shape, therefore, the upper part of the wing can accelerate more air faster and create more lift out of it, that same ''aero technology'' is being applied on the 787, check it for your self at smartcockpit on 787 misc part, systems and performance page 22.

Cap. PiSkiS is offline  
Old 4th Mar 2010, 07:45
  #6 (permalink)  
Join Date: Jan 2010
Location: USA
Posts: 48
I think swh is right. On other types you're supposed to leave them out until you park and have an inspection.
catiamonkey is offline  
Old 4th Mar 2010, 08:33
  #7 (permalink)  
Join Date: Dec 2001
Location: what U.S. calls Žold EuropeŽ
Posts: 934
A picture from the first Singapore A380 after Landing in SYD in December 2007
I taxied out at night, so I do not know what the spoilers did. During taxi after landing the spoilers stay extende about 100 mm even with the flaps already fully retracted, and return to the stored position at engine shutdown.
I suppose also this is to minimize damage to the flap paint during ground operation, once the flaps are extended enough to avoid spoiler contact, they will retract.
Volume is offline  
Old 5th Mar 2010, 20:57
  #8 (permalink)  
Join Date: Feb 2010
Location: Norden
Posts: 131
I think protection of the upper flap surface is the reason for this spoiler
behaviour.Middle and outer flaps are made of carbon...
no-hoper is offline  
Old 10th Mar 2010, 23:17
  #9 (permalink)  
Join Date: May 2009
Location: Australia, maybe
Posts: 556
The last 2 posts were close, but not quite correct.
Spoilers extend 5 degrees on ground when flaps are fully retracted or moving, and at least one engine is running. This prevents friction between spoilers and flaps which could damage the spoilers.
Trent 972 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

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.