A321 Neo Nx

0 views

Skip to first unread message

Baldomero Prado

unread,

Aug 3, 2024, 5:50:09 PM8/3/24

to burghamsresyn

Everything seems normal on managed descent but I can't get the fully loaded aircraft to go below 240ias even with full airbrakes. The engines just spoolup to compensate. It seems that this is true until flaps1 deployed and the sticker in the cabin say 230ias which I can't reach.

Would it be standard practice to deploy the landing gear at 250 to help with the speed? Is there something wrong with this model? I have seen other comments regarding VFENext which is involved with this problem.

I normally initiate the Approach Phase via the MCDU when I'm below 10,000ft above airport altitude
and let the aircraft manage the speed. I'm normally configured for flaps2 before I get below 2,000ft above runway alt.

If you are tying to get the ias down to approach speed and the engines are spooling up,
I suspect that you have not initiated the approach phase, unless there is a speed restriction in your flight
plan stopping you from slowing down the aircraft.

I just made the flight, without TRANS, direct to KSINO
it wa sa little difficult to slow down, i was at 220kts on the Glide at SHAND with 15kts cross wind and conf2 extended, 70tons.
i then extend the gear at this point, without it the AC would have not slowed down.
Then conf3 and full.
I think the procesure and the "high" altitude of LAS don't help. Don't hesitate to use the airbrakes to help the deceleration during the last segment.

The A321 will not "Go-Down and Slow-Down", especially when heavy, on a constant descent type arrival this can be problematic! Looking at the arrival I'm not sure why the AFS wouldn't let you go below 240kts after ZIGGG unless the 210kt restriction at PRINO wasn't being considered or green dot was 240kt.

If it was the former then to fly this arrival in the initial stages judicious use of selected speed, full speed brake would be needed. You could use OP DES to get down to a crossing altitude restriction so you get a level segment to help reduce the speed but exercise care if you do to make sure you don't bust the restrictions (progressively set them in the FCU rather than the bottom altitude).

If you were being limited by green dot then you would need to get CONF 1 out by activating the approach phase, for weights below MLW GD is not greater than the CONF1 Vfe (238kts as modelled in this aircraft, I'm not sure what the big deal with the placard is, it's correct on the PFD). If for some reason your green dot is greater than the CONF 1 Vfe then you need to use selected speed to reduce below the Vfe first (eg pull speed and select 220kt, select FLAP 1 below Vfe and then manage speed again). Best to do this in level flight with the speed brakes retracted as you'll hit the Vls quickly otherwise.

As @Nemov31 suggests CONF2, Gear Down, Selected Speed 180kt is a great "get out of jail free" card to play if you end up hot and high, lots of traps associated with this so it's best to use on the localiser (or final approach track) VS -1500/-2000 with the FCU altitude above the aircraft with APPR armed.

Thank you for confirming that it is difficult. After flying A319 and A320 I was not expecting this degree of difference. I think I will give a light load a try and see how it behaves. I just don't get that the engines are staying in speed even though I am in approach and with full speed brakes.

I cannot get to VFE as per the placard 230 or 238 or 235 that I found for a sim sop for a321. The placard is for a319/320 maybe. It also suggested conf3 for this plane. Want I have encountered reads like I should know what I am doing when using this.

I am using Speedy Copilot which isn't working during descent for my flying at any rate. I have manually done the approach and I can get it down but almost always fast. I tried today and I was doing 240 green dot at 26L.

I am finding that unless I can extend the flaps this plane will not slow down. Wish I could silence that dam over speed sound! Anyway, extend flaps 1 at 240 and I don't get the alarm but immediately the engines go to idle.

If you use the hint given by @AileronsNeutral to use OP DES rather than DES this behavior will stop unless you arrive at your dialed in altitude. Not sure whether constraints can help you that much while staying in DES, at least at the current state of the ToLiss (see discussion about the aircraft breaking the calculated speed continuum)

Trying to use all the comments above, I tried to keep on green dot as much as possible and during approach at prino I lower the gears and deploy flaps1. Everything just falls into place after this point. I would like to get a bit closer to VFENext 238 but I can find no way to do this will a full aircraft. There won't be many flying I think so they will be very full!

The FMGS is designed to give a physically possible path to slow down, but you need to be a bit on your toes with respect to flap extension. Until the DECEL point, you can stay clean, at DECEL, the speed target should go down to the lower of the two:
- VFE Next -5, or
- Greendot speed.

This is the point, where you need to be quick to extend to flaps one as soon as possible, otherwise the engines may spool up to maintain this speed target, which on the A321 is fairly high. Once you extended to flaps 1, I would also suggest to do flaps 2 as soon as you are below VFE Next, as flaps 1 (slats only) has very little impact on drag. Once you are in flaps 2, you are in an increased drag configuration, and you have much better deceleration performance.

The following things can cause this not to work correctly:
- Descent winds not entered, or incorrect: If you have tailwind that the FMGS doesn't know about, the slowdown will not happen as it tries to maintain a profile calculated for a smaller ground speed
- Destination QNH not entered on PERF DES page. The airport target altitude is not aligned with the end of the descent profile in this case, as the FMGS assumes 1013hPa as QNH, and the real pressure may be different.

Hi guys, I am in need of some help.
my platform is on the Xbox and I am having some issues with the a321 navigation displays. I load into the game and start to set the flight and all I see is (heading map not available) NAV ACCUR UPGRAD. I am starting to give up hope, and I have not even flew this jet yet. Can anyone help me out?

Lastly, while I understand the allure of flying the A321, if the issue persists, don't give up entirely on your aviation aspirations. There are a plethora of other incredible aircraft in MSFS 2020 to explore and master while this issue gets sorted. And always remember, the flight sim community is vast and supportive. If you ever need assistance, we're here to help!

If the question and answers provided above do not answer your specific question - why not ask a new question of your own? Our community and flight simulator experts will provided a dedicated and unique answer to your flight sim question. And, you don't even need to register to post your question!

Be sure to search for your question from existing posted questions before asking a new question as your question may already exist from another user. If you're sure your question is unique and hasn't been asked before, consider asking a new question.

Is Little NavMap compatible with XBOX MSFS 2020? I used to use a computer for MSFS but recently got an Xbox Series S for Gaming. Thought I'd try FS on it. but would like to have a Nav element like Little NavMap. If it isn't, know of any that are? Thx....

Hello,I started in Flight Simulator back in the late 80s/early 90s. Loved it, on a hand built PC, add-ons to load in the 100s. Progressed up to fs2004 I think, then sort of lost interest until a month ago when I became aware of msfs 2020, looked so ...

Your query about integrating the venerable Microsoft Sidewinder Precision 2 joystick with the Xbox Series S for MSFS 2020 is an interesting one, touching upon compatibility issues between legacy hardware and modern gaming consoles.Firstly, it's import...

I have MSFS 2020 installed on my newly purchased Xbox (some 6 months ago) - Can I install the same or similar version (using the same software/license agreement/code? etc) to allow me to use it on my Laptop (as I don't want to buy another license, as I wi...

I built up a collection of planes on my PC and no longer use it as it's not quite up to snuff for MSFS. Do you think it's possible to load MSFS for XBOX with content downloaded elsewhere?limiting myself to the Xbox store is a bit of a shame reall...