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Flybywire A320 landing bug?

Featured Replies

The latest Master on github is much improved for takeoff.  I'm going to test landing in a few. Still not great but it's getting there. The elevator control was much smoother when taking off.

Tony Fontaine

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4 hours ago, 2reds2whites said:

The retard call is only an ‘instruction’ during an autoland. The thrust levers can be closed whenever you like during a manual landing. On a 320/319 that’s often just as you start the flare, unless you have some big sink or something. On the 321 you do it a little later. 

At any Vapp you’ve got ages before you’d get anywhere near the stall or wing drop during the flare. You’d be dragging the tail along the ground before that happened. 

Indeed so. I think a lot of people think that an Airbus is something apart from other tube-liners, but it still obeys Newtonian laws! I wish I could get my hands on the FBW params in this sim. It is not a very good representation of the type in FS2020 although the system tweaks available at least make it function better in other ways.

Robert Young - retired full time developer - see my Nexus Mod Page and my GitHub Mod page

This is a known bug with the default A320. The FBW mod has made no attempt to fix it.

There is currently no fix. For those wondering what it looks like, see this:

https://youtu.be/Q6Zz5zQthcc?t=5653

Edited by WestAir

Take-offs are optional, landings are mandatory.
The only time you have too much fuel is when you're on fire.
To make a small fortune in aviation you must start with a large fortune.

There's nothing less important than the runway behind you and the altitude above you.
It's better to be on the ground wishing you were in the air, than in the air wishing you were on the ground.

1 minute ago, WestAir said:

This is a known bug with the default A320. The FBW mod has made no attempt to fix it.

There is currently no fix. 

Try the latest master mod. It's much better.

Tony Fontaine

Just now, CaptBillyBob said:

Try the latest master mod. It's much better.

The latest master does not* fix the default flare logic. My running theory is ASOBO put the pitch axis into roll by accident. 

*AFAIK the team hasn't worked on the FBW or AP behavior of the default sim.

Take-offs are optional, landings are mandatory.
The only time you have too much fuel is when you're on fire.
To make a small fortune in aviation you must start with a large fortune.

There's nothing less important than the runway behind you and the altitude above you.
It's better to be on the ground wishing you were in the air, than in the air wishing you were on the ground.

My understanding is that they don’t have access to that part of the code that controls the A320 flight dynamics. Otherwise I am sure that they would have addressed this a long time ago.

GregH

Intel Core i7 14700K / Palit RTX4070Ti Super OC / Corsair 32GB DDR5 6000 MHz / MSI Z790 M/board / Corsair NVMe 9500 read, 8500 write / Corsair PSU1200W / CH Products Yoke, Pedals & Quad; Airbus Side Stick, Airbus Quadrant / TrackIR, 32” 4K 144hz 1ms Monitor

It's not perfect, but it's better than it was. Can someone try the latest master file? 

Tony Fontaine

43 minutes ago, WestAir said:

This is a known bug with the default A320. The FBW mod has made no attempt to fix it.

There is currently no fix. For those wondering what it looks like, see this:

https://youtu.be/Q6Zz5zQthcc?t=5653

This is interesting because behavior in the video is similar  to approaching critical angle of attack - controls become sluggish and not responsive as in normal flight

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I‘d never had banking problems until yesterday (first flight with the latest patch + latest master mod). I did everything the way I always do it (disengage AP at around 500ft, pull up the nose a little at <30ft and set the throttle to idle at „retard“) but this time it banked to the left. On my second flight after the patch I had to do the final manually because I didn’t have the correct ILS frequency. At about 1000ft with flaps fully down the plane started to sink rapidly. The autothrottle didn‘t seem to care and I crashed into the ground one mile before the runway. I‘ve done quite a lot of flights in the a320 and I‘d never encountered these issues before. It‘s rather annoying. Does removing the mod solve these problems?

Edited by Shack95

i9-11900K, RTX 4090, 32 GB ram, Honeycomb Alpha and Bravo, TCA Airbus sidestick and quadrant, Reverb G2

2 minutes ago, Shack95 said:

I‘d never had banking problems until yesterday (first flight with the latest patch + latest master mod). I did everything the way I always do it (disengage AP at around 500ft, pull up the nose a little at <30ft and set the throttle to idle at „retard“) but this time it banked to the left. On my second flight after the patch I had to do the final manually because I didn’t have the correct ILS frequency. At about 1000ft with flaps fully down the plane started to sink rapidly. The autothrottle didn‘t seem to care and I crashed into the ground one mile before the runway. I‘ve done quite a lot of flights in the a320 and I‘d never encountered these issues before. It‘s rather annoying. Does removing the mod solve these problems?

Probably not. The mod doesn't touch the autopilot, flybywire, or autothrottle. It might change fuel burn rate or lift coefficient.

Take-offs are optional, landings are mandatory.
The only time you have too much fuel is when you're on fire.
To make a small fortune in aviation you must start with a large fortune.

There's nothing less important than the runway behind you and the altitude above you.
It's better to be on the ground wishing you were in the air, than in the air wishing you were on the ground.

This is so unfortunate. I don´t dare to fly in vatsim anymore with this bird because lack of confidence if my landings works or not. The whole situation is very sad. There are so much potentials in this sim but somehow MS and ASOBO are not quite up to the task. It describes the entire situation, that after every patch, the geniuses of the community has to come and fix the errors which MS/ASOBO has made. Sad. 

Edited by Virtpilot

Tapani Österberg

Guys, submit tickets to Zendesk 🙂 I am not sure Asobo has the time to read every Avsim thread.

2 hours ago, WestAir said:

Does removing the mod solve these problems?

No, this is not a error in the mod. It was present in the RTM version of the sim when it first came out.

GregH

Intel Core i7 14700K / Palit RTX4070Ti Super OC / Corsair 32GB DDR5 6000 MHz / MSI Z790 M/board / Corsair NVMe 9500 read, 8500 write / Corsair PSU1200W / CH Products Yoke, Pedals & Quad; Airbus Side Stick, Airbus Quadrant / TrackIR, 32” 4K 144hz 1ms Monitor

I believe the FBW logic is bugged here & there...

The other day I decided, in a flight between Brest and Bibao with Alex playing it's tricks, to penetrate what appeared to be a well developed convective cloud... 

After a while I was climbing at a really high rate ( around 6000 fpm ) but noticing a really shallow pitch being displayed in the PFD, so, I decided to look from the outside and saw the aircraft fuselage actually pitching down a bit...

I believe the relative wind which should have a considerable vertical component was making the Alpha protection logic command such a pitch ( ? ) 

A similar problem might be happening on during landing. Somehow the FBW logic is determining a too high AoA and preventing the aircraft from pitching up during approach as some report, while on other occasions, probably in the last 50 ft when the control logic blends near ground, kicking in with some sort of wing stall ?

Well... we need good 3pd airbuses, at least for comparison and concept proof for the new "Modern" FDM in as far as it's FBW capabilities can go 🙂 

Flying gliders since 1980

Flightsimming since 1992

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