I do have this topic on almost every aircraft. I did verify it with the A320, B787, C208, and King Air. The setting is always the same except test altitude (FL 200 for the large jets, 8000 ft for the smaller props). Set the weather to partly cloudy, no wind, standard atmosphere, partially cloudy in the test altitude. Climb to the altitude, set AP to altitude hold, set throttle to about 75%, wait until airspeed has stabilized and fly into a cloud. The airspeed drops up to 10% and comes back when you leave the cloud.
It also effects the rate of climb on VNAV mode quite strongly.
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By the way, it happens in preset and live weather, only depending on cloud or clear. Try a high gross weight take off in fog with the B787. In CDG it barely lifted off before the end of the longest runway.
I have noticed this. I seem to remember hearing or reading in an update that they added simulation of water particles density - could this be affecting the performance in clouds?
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Whatever the cause it needs to be fixed. I think it affects all aircraft in the game. I would hope people vote this up and submit zendesk tickets.
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Look at my reply a few lines up and try moving the camera as described. It seems to be related to that. A bug nonetheless.
I’m having the same problem. Loosing airspeed on clouds. And taking off from fogged airports is a nightmare… Not sure WHEN it started to happend… But on 1.14.5.0 is still not solved.
VOTED on this issue… is REALLY annoying… to say the least.
Thank you for your posting. What i have done, and looks like works, is TURN OFF the “DRONE LOCK MODE” on the Showcase. If you try this and also works just let us know…
Cheers.
Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
No mods are active
Are you using Developer Mode or made changes in it?
No
Brief description of the issue:
When flying through clouds, the aircraft will lose speed. I believe it affects all aircraft. For example, with C208, the speed drops about 10kts in level flight. It can take around 3-5 minutes for the full drop in speed. This is not icing related and is easy to replicate by adjusting the weather dynamically.
Provide Screenshot(s)/video(s) of the issue encountered:
Detail steps to reproduce the issue encountered:
Use a C208 and fly level at 10000’ in clear skies. Adjust the weather to be overcast and outside air temperature of 10*C. Monitor the aircraft speed for about 5 minutes. The speed will drop.
NOTE: If the showcase camera is moved outside the cloud, the speed will recover. If the camera is moved back to the cockpit, the speed will drop.
This affects IAS, TAS, GS and performance of the plane.
PC specs for those who want to assist (if not entered in your profile)
`Did you submit this to Zendesk? If so, what is your ticket #?
81590
This is very annoying, calculating TOD is useless because of this. While I maintain a stable -2000 fpm descent, it drops down to -3000 to -3500 in clouds.
Massive clouds have downdrafts in FS20. You can see this if you open the debug menus.
How does that explain this finding mentioned above:
It was definitely not a downdraft. And I don’t think that downdrafts are properly modeled yet. You can fly with a Cessna into a cumulonimbus without a problem, minus the potential icing.
The descent rate increased because the A32NX was descending with a maintained airspeed. Either airspeed decreases or the descent rate does. I was at my altitude constraint 30 NM ahead so the clouds definitely decreased the aircraft’s performance.
Why does the airspeed increases to normal in showcase mode… that I don’t know and it’s very weird.
Bumping this issue as still has not been fixed in the latest update.
I posted about this back in December, in a now archived thread:
https://forums.flightsimulator.com/t/slow-speed-in-clouds/330717/15
It’s certainly not a new problem by any means. Though the last time I went through a cloud I was watching my airspeed, and I didn’t notice a drop that time.
See this issue happen in the PMDG DC-6 now. Airspeed in cruise at FL 210 (AFE controlled) dropped from 190 IAS to 140 IAS. Had to disable the AFD and manually adjust rpm and throttle. After passing that cloud level airspeed went back to normal.
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Bumping this thread. It has not yet been fixed after SU5.
I am not surprised. It seems like they’ve got larger problems at this point.
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Can the title be changed to “Decreased aircraft speed in clouds”. I think that my get more peoples attention especially when linked to another thread.
I don’t agree and it’s imprecise.
I’ve noticed this problem when the climb rate (below the cloud base!) dropped to zero.
IMO a loss of climb performance is more noticeable than not achieving the target cruising speed.
This topic hasn’t attracted much attention and I wonder if people see “performance” they think FPS rather than a bug affecting the aircraft speed.
To be clear, it absolutely affects climb rate, but also cruise and descent. It throws off POH numbers where cruise speed doesn’t match published engine settings.
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