Wind turbulence feedback / issues
complete
Brad Oastler
Beta 13. Flying a GA plane right now, clear skies over the Midwest USA, 10,000 feet, wind is approximately, 220/30, reading between the 9000 and 12000 layers. If I set maximum wind turbulence to 40 or greater, the conditions are essentially unflyable based upon severe turbulence. Set to 39 or less, and it immediately calms way down and is mostly smooth, with occasional gusts bouncing the plane. There does not seem to be a happy medium.
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hifi-admin
complete
Lknfly1
I believe you're going to a very complex engine weather currently, despite some bugs that I had also encountered about excessive turbulence, crazy up/downdraft which made my GA kissed the ground just after T/O but by reading the posts here and by adjusting drastically my AS settings as mentioned, it was much more coherent, I didn't have time to dig more than a few flights, I just downloaded the RC1.
By the way I really appreciate on my side that severe turbulence means somethig now especially for GA, in real life we stay grounded, now if we decide to fly in such unsafe weather conditions in Xplane/Active sky, it's our own risk! Let's check about the adjustments done in this aera in the last version and I'll try to provide further detail information.
Keep it up guys, thank you for your solid commitment! ;-)
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hifi-admin
fixed
Existing issues fixed and tuning per feedback done for RC1, pending.
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hifi-admin
Just a note that there was a big issue with smaller aircraft and Beta 13 and also 14 turb adjustments, so if you were flying anything smaller than a light airliner it definitely will be more effect than intended. We'll get this sorted out and incorporate the latest round of suggestions for upcoming RC1.
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hifi-admin
in progress
Adjustments and tuning made in beta 14, now posted. Additional feedback requested, we are still tuning this.
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hifi-admin
under review
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hifi-admin
Merged in a post:
Extreme turbulence
Anton_Kuf Glushenkov
in beta 12 while flying I sometimes experience unrealistically strong turbulence. Either there is no turbulence at all, or it is very strong. from extreme to extreme. video for example https://youtu.be/rEiKX9MKqGs
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hifi-admin
Thanks for the feedback, please keep it coming. We will be tuning turbulence as a focus for next build.
Also, let's please define targets and expectations here: Severe/Extreme turbulence means the airplane SHOULD be occasionally out of control and unflyable, without AP availability. That is what we want when we are flying in severe turb. Not excessively out of control and tumbling through the sky, but definitely experiencing occasional periods of loss of control. In normal flights/sim sessions, we want to avoid it at all costs, just like IRL. Unless we're testing of course :)
Moderate, light and heavy should offer various degrees of attitude variations and "bumpiness". When testing the effect directly, please make sure default options are in use, and use manual weather areas with individual aloft layer turb adjustment to make sure you are getting the conditions you are testing against. Live wx/historical will have intended variation making it more difficult to test.
Thank you!
Brad Oastler
hifi-admin: Understood re: what severe turbulence should cause--I did not see anything in the clear sky area I was in that made me think there should be autopilot-shutdown levels of bumps--at least, not without an indication in the aviation forecast that was up on the NOAA site.
Flying again now, set cloud and wind turb to 50. Headwinds are not as strong in this spot as they were yesterday, but flying over mountains, through clouds, and against a ~10 knot headwind, and there is what I would describe as a reasonable level of bounce--some light chop, and an occasional spot that pushes the wings over maybe 30 degrees. Seems much more reasonable. These conditions are not as windy as what i had yesterday, but I think the tweaks improved the turbulence adjustment significantly.
Edit: adjusted cloud/wind turb up to 70, still good, although again, not the same wind conditions. I'll try historical weather at the spot I was at yesterday and see what happens.
Brad Oastler
Now trying to takeoff at KTRK, metar is:
KTRK 071948Z 19010KT 10SM OVC041 06/M02 A3010 RMK BINOVC
And on four successive takeoffs, I can climb about 200 feet, and then am immediately forced into 90 degree rolls and nose-down crashes. Turned the turbulence values down, and that had no effect.
Tried the default cessna in case it was the plane I was using, same result.
Tried a different field nearby, no problems on takeoff. KTRK is kind of tucked in between some hills, but not sure why that spot was getting rocked.
Harry Le
I think it is a problem with the CAT feature in this new beta.
My Story:
I am flying a C172 around 4000 feet. I am reading steady headwinds from the screen.
At any particular moment in time, I would fly into a CAT generated by the plugin and it is so severe my plane yaws a whole 90 degrees in a given direction. I tried to fight it and nosedived the 172 into the ground.
I turned off "Override XP12 Surface Variability" and things calmed down for the most part. Later I turned it back on and the same thing happened with my plane turning and yawing in all directions
I also reduced the "Maximum Wind Turbulence" slider (like Brad said) to help with the choppiness and it eased the turbulence a lot. Now the plane just "kicks" a bit from time to time
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hifi-admin
Further tuning/adjustments are planned for next build as well.
Anton_Kuf Glushenkov
hifi-admin: there is still sometimes very strong turbulence, which even turns off the autopilot
AS 8524
hybrid: on
override XP12: on
flight plan from simbrief
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hifi-admin
Anton_Kuf Glushenkov: Of course, there should be up to severe, which will definitely disable the autopilot. That's not a bug if severe. Please describe the conditions. Note that the debug screen of ASXP12 shows the current ambient turbulence level. If you're flying in a convective area with severe turbulence reported, it would be normal to get severe turbulence which means basically out of control and no autopilot. Light to moderate levels of turbulence should not disable the autopilot nor cause control issues other than the occasional attitude deviation.
Anton_Kuf Glushenkov
hifi-admin: I can only describe the metar that was: URWW 061130Z 20008MPS 9999 TS BKN044CB 22/10 Q1014 R05/290060 TEMPO 1500 TSRAGR BKN005 BKN030CB
But the weather radar shows green, not yellow or red.
And by the way, there was no thunderstorm on the weather radar, but there was heavy rain, but this can be understood as it is expected at times.
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hifi-admin
Anton_Kuf Glushenkov: TS BKN044CB, so in clouds (inside the thunderstorm) extreme/severe turbulence would be expected, and this should be properly depicted in sim. The XP12 radar is not accurate, always shows green in any precip from our experience, this is not something we have control over at this time.
So, if you are getting "too much turbulence that causes autopilot to disconnect" when in severe turbulence conditions, such as within a thunderstorm cloud, again I say, that is proper and not a bug. Thanks for confirming things are working properly. If however you are getting severe turbulence in clear air or otherwise conditions that should NOT be severe (outputted turbulence is always shown in debug screen), then we can look at that as a bug, with the discrepancy between expected turb (debug screen) and actually experienced shown (video would be ideal). Thank you!
Anton_Kuf Glushenkov
hifi-admin: Thank you for the clarification. it turns out that the weather radar does not work as it should and does not show cumulonimbus clouds, it always shows it green, so this is an xp12 problem?
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