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

A321 tail strike

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

A321 tail strike

Old 15th May 2019, 18:16
  #1 (permalink)  
Thread Starter
 
Join Date: Mar 2008
Location: Israel
Age: 54
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
A321 tail strike

Does the A321 neo/ceo has a any mean of preventing tail strike on takeoff or landing? (incorporated in the fly by wire software may be..?)
avieh7 is offline  
Old 15th May 2019, 18:27
  #2 (permalink)  
 
Join Date: Feb 2019
Location: shiny side up
Posts: 431
Likes: 0
Received 0 Likes on 0 Posts
pitch rate damping
Smythe is offline  
Old 15th May 2019, 18:44
  #3 (permalink)  
Thread Starter
 
Join Date: Mar 2008
Location: Israel
Age: 54
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
anything in the FCOM regarding this..? (specifically to tail strike)
avieh7 is offline  
Old 15th May 2019, 20:33
  #4 (permalink)  
 
Join Date: Mar 2006
Location: USA
Posts: 2,509
Likes: 0
Received 0 Likes on 0 Posts
The NEO has different rotation and flare laws.
Check Airman is offline  
Old 16th May 2019, 05:54
  #5 (permalink)  
 
Join Date: Jun 2006
Location: B.F.E.
Posts: 228
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Check Airman
The NEO has different rotation and flare laws.
Having only flown the A321 NEO, what is different in the programming of the rotation and flare from a CEO 321?
hikoushi is offline  
Old 16th May 2019, 07:09
  #6 (permalink)  
 
Join Date: Sep 2011
Location: FL390
Posts: 226
Likes: 0
Received 0 Likes on 0 Posts
NEO rotation law commands pitch rate (with the opportunity to limit rate approaching tailstrike). CEO is direct stick to elevator law.

For landing it’s the opposite - the NEO is effectively direct law with pitch rate damping, CEO is flare law.

Takeoff is is easier in a NEO once you’re used to it. Not landed an A321 NEO yet so can’t comment.
Fursty Ferret is offline  
Old 17th May 2019, 19:47
  #7 (permalink)  
 
Join Date: Oct 2004
Location: Near sheep!
Posts: 915
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Fursty Ferret
NEO rotation law commands pitch rate (with the opportunity to limit rate approaching tailstrike). CEO is direct stick to elevator law.

For landing it’s the opposite - the NEO is effectively direct law with pitch rate damping, CEO is flare law.

Takeoff is is easier in a NEO once you’re used to it. Not landed an A321 NEO yet so can’t comment.
You have taken off but not landed?
WindSheer is offline  
Old 17th May 2019, 19:57
  #8 (permalink)  
 
Join Date: Jan 2008
Location: Reading, UK
Posts: 15,786
Received 196 Likes on 90 Posts
Originally Posted by WindSheer
You have taken off but not landed?
I'm guessing that he means he has taken off in an A320neo, and it was still an A320 when he landed it.

Originally Posted by Fursty Ferret
Takeoff is is easier in a NEO once you’re used to it. Not landed an A321 NEO yet so can’t comment.
DaveReidUK is offline  
Old 17th May 2019, 20:59
  #9 (permalink)  
 
Join Date: Aug 2012
Location: Not At Home
Posts: 2,448
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by avieh7
Does the A321 neo/ceo has a any mean of preventing tail strike on takeoff or landing? (incorporated in the fly by wire software may be..?)
Yes. Our A320 CEO / NEOs & A321 NEOs have a tailstrike proection for take off / Lansing.

This is not published in the FCOMs as Airbus decided it to be so. I’m not sure if it’s a customer option or standard fit but our 319s don’t have it.

On the 320 CEO, for example, as pitch increases beyond 9 degrees the nose will be forced downwards regardless of pilot input. I’ve seen it in action and it took the peak pitch from just under 10 back down to 5 while the side stick was maintained aft (unbeknown to me!).
EcamSurprise is offline  
Old 18th May 2019, 09:08
  #10 (permalink)  
 
Join Date: Jan 2006
Location: US
Posts: 2,205
Likes: 0
Received 0 Likes on 0 Posts
“This is not published in the FCOMs”

That almost sounds familiar...
misd-agin is offline  
Old 18th May 2019, 09:35
  #11 (permalink)  
 
Join Date: Mar 2006
Location: USA
Posts: 2,509
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by misd-agin
“This is not published in the FCOMs”

That almost sounds familiar...
A change to the flight control system during a critical phase of flight? Surely you jest
Check Airman is offline  
Old 18th May 2019, 11:37
  #12 (permalink)  
 
Join Date: Jul 2010
Location: Asia
Posts: 1,529
Received 45 Likes on 27 Posts
I can't comment on the A321 but the A320 NEO definitely feels different on rotation compared to the A320 CEO. The NEO (P&W) seems to rotate lightly and then pitch nose up once it's airborne,as if the rotation rate is being limited close to the ground. I could easily tell you which type I was flying with no other clue except how they take off.
krismiler 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 © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.