Hello,

First of all, congrats for the release of the A380 :)

i have a couple of question regarding the FBW in normal law in flight mode especially for the roll axis.

Indeed, the roll axis on my side is extremly slow, it feels like I have not much authority in the roll axis.

You may be surprised but the A380 should handle in Flight mode just like the A380:

A380 FCOM says that max stick deflection in the roll axis in flight mode is 15°/s just like the A320 so going from 0°of bank to 33° should take approx 2s
Regarding the pitch, it has like the A320 2 modes :
Pitch rate demands at low speed and g load demand at high speed ; max being 2.5G/-1G in clean config ( like the A320 but need to check)

however, i find the pitch axis to be quite responsive except in flare law where it feel like I have almost no autority below 50ft, i need to maintain like 40-50% of stick deflection for the pitch to very slowly increase

More Over, the pitch attitude seems too stable in ground effect as when releasing the stick, the pitch should drop immediately and this is barely the case currently

https://youtu.be/DetjUgz1-v4?t=619

i created a plugin that analyse the flare :

you can see when i release the stick, the pitch of the aircraft is still increasing instead to drop.

there is really a big difference compared to the A350 and there is shouldnt as the A350/380 has the same FBW features, the A350 behaves in flight mode and flare law as what you can expect.

Hi,

Thank you for the very detailed feedback! We appreciate you taking the time to describe your experience.

I will forward this to the appropriate team for further investigation.

Thank you again!

Did a test :

0 to 33° and then 33° to -33°

average roll rate with full stick déflection is below 15°/s

https://www.youtube.com/watch?v=4RvYks1PWoE

Analysed by Open AI

1. From 0° to +33° bank

• Start of the roll: ≈ 5.2 s

• Reached +33° bank: ≈ 8.0 s

• Bank change: 33°

• Duration: ≈ 2.8 s

Average roll rate:

33° / 2.8 s ≈ 11.8°/s

➡️ ≈ 12°/s

2. From +33° to −33° bank

• Start at +33°: ≈ 8.0 s

• Reached −33°: ≈ 16.0 s

• Total bank change: 66°

• Duration: ≈ 8.0 s

Average roll rate:

66° / 8.0 s = 8.25°/s

➡️ ≈ 8.3°/s

Results

Maneuver	Bank change	Duration	Average roll rate
0 → +33°	33°	~2.8 s	~11.8°/s
+33° → −33°	66°	~8.0 s	~8.3°/s

These are average roll rates, not the instantaneous peak roll rate.

Edited September 17Sep 17 by Camille MOUCHEL