A320neo Rotation
Thread Starter
Join Date: Sep 2011
Location: London, UK
Age: 32
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
A320neo Rotation
Anyone noticed a tendency to over-rotate on the A320 NEO? Kind of as if the aircraft were tail-heavy and incorrectly pitch-trimmed.
I’ve noticed several pilots applying a sidestick deflection similar to that of the A320 CEO but resulting in a much higher rotation rate.
Apparently Airbus has modified the FBW rotation law because of engine related issues and flap/slat angles, but I have no particular details about what they’ve done to the rotation law.
Thanks for any feedback! Have a good week.
I’ve noticed several pilots applying a sidestick deflection similar to that of the A320 CEO but resulting in a much higher rotation rate.
Apparently Airbus has modified the FBW rotation law because of engine related issues and flap/slat angles, but I have no particular details about what they’ve done to the rotation law.
Thanks for any feedback! Have a good week.
Join Date: Sep 2011
Location: FL390
Posts: 238
Likes: 0
Received 0 Likes
on
0 Posts
Anyone noticed a tendency to over-rotate on the A320 NEO? Kind of as if the aircraft were tail-heavy and incorrectly pitch-trimmed.
I’ve noticed several pilots applying a sidestick deflection similar to that of the A320 CEO but resulting in a much higher rotation rate.
Apparently Airbus has modified the FBW rotation law because of engine related issues and flap/slat angles, but I have no particular details about what they’ve done to the rotation law.
Thanks for any feedback! Have a good week.
I’ve noticed several pilots applying a sidestick deflection similar to that of the A320 CEO but resulting in a much higher rotation rate.
Apparently Airbus has modified the FBW rotation law because of engine related issues and flap/slat angles, but I have no particular details about what they’ve done to the rotation law.
Thanks for any feedback! Have a good week.
Join Date: Jul 2000
Location: My views - Not my employer!
Posts: 1,031
Likes: 0
Received 0 Likes
on
0 Posts
Thanks bright teeth...
Love it when they do little whoopsies in reports!
First quote from the FCTM in the rotation technique section
Then a quote from the safety analysis section
Love it when they do little whoopsies in reports!
First quote from the FCTM in the rotation technique section
Initiate the rotation with a smooth positive backward sidestick input (typically 1/3 to 1/2 backstick). Avoid aggressive and sharp inputs. The initial rotation rate is about 3 deg/sec. If the established pitch rate is not satisfactory, the pilot must make smooth corrections on the stick. He must avoid rapid and large corrections, which cause sharp reaction in pitch from the aircraft.
During rotation, the cadet pilot applied a larger than normal pitch input (3/4 backstick versus the recommended 1/2 to 2/3 of backstick travel) resulting in an excessive pitch rate during rotation (9 deg/sec versus a target of 3 deg/sec)
Can any of you who fly the A320/321 NEO and also fly the CEO confirm how many line training ( LT) sectors, if any, you received when converting onto the NEO. There is currently a push not to provide any LT and just rely on a half day class room and a home study CBT to cover the differences.
I REALLY SHOULDN'T BE HERE
I prefer the slightly sportier and more crisp initial pitch characteristics on the NEO vs the CEO. The initial nose attitude is also higher as the Leap version fitted to my company's fleet develop more thrust than the CFM56 version.
Join Date: Apr 2010
Location: in the sky allways
Posts: 65
Likes: 0
Received 0 Likes
on
0 Posts
Been flying the CEO and Neo regularly and the neo has a tendency to go to high pitch .. need a councious mind not to pull back....just ease the pressure passing 10 degrees and it settles at 15.
Thread Starter
Join Date: Sep 2011
Location: London, UK
Age: 32
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Reason
Unlike the current A320, the sidestick commands pitch rate on the neo during rotation. So if you're used to adding that extra "pull" through the dead spot at about 10 degrees you'll command a high rate. The rotation is muscle memory so it takes a conscious effort to set a pitch rate and stick to it.
Thread Starter
Join Date: Sep 2011
Location: London, UK
Age: 32
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,404
Likes: 0
Received 0 Likes
on
0 Posts
Unlike the current A320, the sidestick commands pitch rate on the neo during rotation.
Join Date: Sep 2011
Location: FL390
Posts: 238
Likes: 0
Received 0 Likes
on
0 Posts
It's actually quite a complex blend of multiple different flight control algorithms which vary depending on phase of flight and speed (ie, Airbus will tell you that sidestick demands load factor in flight, but that's only true at high speeds. Below that it's actually direct elevator deflection with a load factor feedback loop, and below that it's AoA directly).
Can't tell you any more about the new rotation law as I now fly the Airbus wannabe, also known as the 787, and no longer have access to the neo FCOM.
Join Date: Mar 2006
Location: USA
Posts: 2,515
Likes: 0
Received 0 Likes
on
0 Posts
Join Date: Jan 2015
Location: Sky
Posts: 78
Likes: 0
Received 0 Likes
on
0 Posts
We had some problems with over rotation in my current company when we started to use mix fleet.Our flight data and analysis group sent some numbers of letters regarding over rotation during take off on the NEO planes particularly with maximum TOW and high OAT.
Some times later our flight department sent a letter with recommendations to carry out all take offs on the NEO fleet with F-2 only!
Since EFB calculations offers F-2/3 only
Safe flights
Some times later our flight department sent a letter with recommendations to carry out all take offs on the NEO fleet with F-2 only!
Since EFB calculations offers F-2/3 only
Safe flights
What is interesting is how different an A320ceo with sharklets is in comparison to an A320neo in the flare. The ceo is very twitchy but the neo is probably less responsive than a A320 with the original tip fences. I can only imagine the differences are down to software
Join Date: Sep 2007
Location: New York
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
Rotation mode
We’re just seeing some more detail from Toulouse on Rotation mode in the neo; it’s active upto 3/4 back stick and damps pitch commands and deck angles. Slightly new Airbus philosophy in that it can be overridden with aggressive Sidestick... looking forward to reading more...