A320 ailerons during rollout
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A320 ailerons during rollout
hi busdrivers!
i recently noticed, that the ailerons of A320 with sharklets are being deflect upwards during rollout without any sidestick input. i'm not 100% sure, but i suppose they deflect upwards simultaneously with ground spoiler extension to support deceleration. the ailerons of a classic A320 don't show that "behaviour" and remain in the neutral position without sidestick input. I searched the FCOM but i couldn't find any information about that so far. can anybody here give me a FCOM reference or some additional information about that (new?) aileron function?
i recently noticed, that the ailerons of A320 with sharklets are being deflect upwards during rollout without any sidestick input. i'm not 100% sure, but i suppose they deflect upwards simultaneously with ground spoiler extension to support deceleration. the ailerons of a classic A320 don't show that "behaviour" and remain in the neutral position without sidestick input. I searched the FCOM but i couldn't find any information about that so far. can anybody here give me a FCOM reference or some additional information about that (new?) aileron function?
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This is what i found i my companys fcom. It applies to a A319-111:
"GROUND SPOILER CONTROL
The ground spoiler function involves all spoilers and ailerons (“aileron anti-droop” function)."
"GROUND SPOILER CONTROL
The ground spoiler function involves all spoilers and ailerons (“aileron anti-droop” function)."
Last edited by onehundred; 24th Oct 2013 at 20:16.
Not familiar with Airbuses generally, but I know this happens on the larger aircraft such as A330 and A340. Maybe it has been introduced alongside the sharklets on the A320?
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thanks for the replies! interestingly the FCOM of the respective aircrafts states
GROUND SPOILER CONTROL
Spoilers 1 to 5 act as ground spoilers.
i also searched the respective FCOM for "anti-droop" without any results. hmmmmmm
onehundred, can you maybe give me the the chapter where u found the anti-droop information? thx!
GROUND SPOILER CONTROL
Spoilers 1 to 5 act as ground spoilers.
i also searched the respective FCOM for "anti-droop" without any results. hmmmmmm
onehundred, can you maybe give me the the chapter where u found the anti-droop information? thx!
Last edited by sierra_mike; 25th Oct 2013 at 16:21.
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Hi sierra,
Onehundred is referring to a specific modification called the "florence kit" available for A319s and 318s that basically allows the ailerons to raise with the spoilers upon touchdown for better landing performances on very short runways (like Florence, Italy). I am not aware of the same kit being available for the A320 so far, but maybe somebody will shed some light on that.
Cheers.
Onehundred is referring to a specific modification called the "florence kit" available for A319s and 318s that basically allows the ailerons to raise with the spoilers upon touchdown for better landing performances on very short runways (like Florence, Italy). I am not aware of the same kit being available for the A320 so far, but maybe somebody will shed some light on that.
Cheers.
And I guess London city as well?
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Not A320 but it's interesting how many folk roll out, with aileron input to try & maintain the centre line. All it does is prevent me seeing the speed tape and making the required calls.
I of course know that it's not a steering wheel and rolling left won't regain the c/l!
I of course know that it's not a steering wheel and rolling left won't regain the c/l!
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question is answered now:
The ailerons are fully-extended, provided one aileron servocontrol is available on each side, when: - The ground spoilers are fully extended
- Flaps are not in clean CONF
- Pitch attitude is lower than 2.5 °
- Flying manually
- In normal law only.
Ref: FCOM/DSC/27/10/20/SPEED BRAKES AND GROUND SPOILERS
The ailerons are fully-extended, provided one aileron servocontrol is available on each side, when: - The ground spoilers are fully extended
- Flaps are not in clean CONF
- Pitch attitude is lower than 2.5 °
- Flying manually
- In normal law only.
Ref: FCOM/DSC/27/10/20/SPEED BRAKES AND GROUND SPOILERS
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I 2021and one hundred
You are correct this is aileron anti droop function installed vide MOI 34097 to improve braking effiency during landing, reject takeoff and operation on short runways.
You are correct this is aileron anti droop function installed vide MOI 34097 to improve braking effiency during landing, reject takeoff and operation on short runways.
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I'll leave this here more for myself or others who seek a reference.
I could not find this in the FCOM as well, but this is mentioned in the Service Bulletin on the introduction of the standard 1.9.0 as for 25-Apr-2014 (p. 9):
I could not find this in the FCOM as well, but this is mentioned in the Service Bulletin on the introduction of the standard 1.9.0 as for 25-Apr-2014 (p. 9):
ELAC L94 to L96:
Basic Aileron up deflection (25˚) at landing for Ground Spoiler efficiency
Basic Aileron up deflection (25˚) at landing for Ground Spoiler efficiency
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I noticed about a year ago on an airline that I fly regularly that both ailerons would deflect fully upward on landing roll. It didn't used to happen and the airline is not having Airbuses delivered. Therefore, I have been assuming that this is a software mod designed to improve landing performance, perhaps more so on contaminated runways.
I believe that the 787 is doing the same thing but have not seen it on the 777.
I believe that the 787 is doing the same thing but have not seen it on the 777.
