A330 flight performance issues

[ryera334]

Both the Airbus a330-300 and a330-900 struggle to climb at all above FL370-FL380 ingame for some reason, and experience unrealistic stalls and physics at/above that altitude, even if flying with an extremely low weight/load. The real aircraft does not have this issue of course…

[Sturmovik]

You aren’t the only one who asked about this, check out the following topic:

Airbus A330-300 Stall

I recently flew in an A330-300 and after around FL250 the plane started stalling and wouldn’t let me climb after I recovered. My V/S was set to 2100 ft/m. And after I recovered I set it to 900 ft/m and it still stalled, I was under the max takeoff weight. Am I doing something wrong?

A350 and a330 stalling issue

Hello y’all I have always had issues with the airbus a350 and a330-300/neo whenever doing a flight. no matter what weight, height, speed or whatever, the plane somehow starts to sway from side to side, and eventually stall and fall out of the sky. this is very annoying, because it essentially means i cannot fly the a350 or a330, and it’s a fun plane to fly. to clarify, this ONLY happens with the a350 and a330. no other plane. does anyone have a fix for this?

[adit]

Also be aware this is to some extent temperature dependent.

Higher outside temperatures means less climb performance and lower max altitude. This is modelled which you can see by testing.

But you shouldn’t have:

@ryera334

unrealistic stalls

as long as you fly the available flight model by lowering VS (through pitch) as much as necessary to preserve forward speed.

As IAS is protected by you lowering VS, eventually as you reach 0 VS, you are at your max altitude, and free from stalling because you flew the model specifically to target preserving your IAS.

[ryera334]

This topic was prompted by me stalling in the A330-300 over the North Atlantic Ocean when I attempted to climb from FL370 to FL400 with a 28% load at just VS200.

[ryera334]

And yesterday I was testing the A330-900 and it stalled going VS500 around FL250 at Mach .79. Just makes zero sense

[ryera334]

2022 and 2023. It is now 2025…

[adit]

@ryera334

stalling in the A330-300 over the North Atlantic Ocean when I attempted to climb from FL370 to FL400 with a 28% load at just VS200

Hi, I tested this (with 30 C surface temp rather than 15 C), but with a heavier 49% load rather than 28%, and I was able to do about VS800 from FL370 to FL400 while still maintaining steady M0.83.

IAS bleeds off just enough to keep Mach speed steady, with just under 100% throttle.

But with the throttle that high there’s no safety margin.

So, although my performance was well better than what you reported, had you already let the speed deteriorate?

Because if you get behind on the speed in this situation you are in a tough position where you don’t have enough engine power to accelerate out of, so you will almost certainly keep losing even more speed until you stall (the drag gets too much to pull out of).

The trick when you are very high is to be very vigilant about not letting your forward speed drop below a no return point.

[Roubsan]

M0.83 is way too fast for an A330. It usually cruises between M0.79 and M0.81.

[adit]

@Roubsan

M0.83 is way too fast for an A330

Ok, I just now tested again but at M0.80 at about the same load (48%), temp (a warm 30C), and again a constant VS800 for climbing between FL370 and FL400.

I still had a bit of throttle power to spare through much of the climb, while maintaining constant M0.80 throughout the climb.

Though just at reaching FL400 the throttle had increased all the way to 100%, so I was at the upper limit.

(backing the speed off from M0.83 to M0.80 the AOA on the data strip increased from 1 degree to 2).

[Christian_Kelly1]

The Airbus A330-300 typically cruises at about Mach 0.82, which corresponds to roughly 870 km/h. Under some conditions it can cruise faster, up to around Mach 0.86

[Christian_Kelly1]

I’ve never had any problems with the A330 or A339 cruising FL390 or above