i flew in this attitude for about three minutes, throttle idle, maintaining 400 feet... then it returned to normal... i guess they must be cooling a big nuclear reactor a little up the stream:-)http://forums.avsim.net/user_files/162324.jpghttp://forums.avsim.net/user_files/162325.jpghttp://forums.avsim.net/user_files/162326.jpg

...what a cool sim FSX is as you peel back the layers.I find it much more "trim-able" than previous incarnations. Unbeknownst to armchair pilots, real a/c can be trimmed for straight and level. Same for a turn, though a bit more refinement is needed.Your pictures clearly show a bug. My story clearly shows the potential.FSX is cool, if nothing else...but I think you already said that.bt

I have had the same thing happen. Last night I was flying a Machado lesson on climbs and descents. Throttle at idle, 90 knots and the Cessna was climbing at 600 fpm. There were no thermals around that I could see. It fixed itself after a couple minutes.Another time I was on final in the Beaver and flew level for several minutes about 100 feet off the ground at just above stall speed with full flaps and throttle at idle. This time I had to nose down and fly it down until I hit the water hard.

Yeh I've had that happen on numerous occasions in FSX. In my opinion something is definately not right. The only addon I'm using is FSUIPC 4.05 & I have most things turned off there anyway.

This is happening very often to me lately. It's really annoying, especially on short final. I'm using FSUIPC (though unregistered) and tried several versions of ActiveSky - no luck so far. Though switching to clear weather altogether in the middle of such a freak incident did definitely help. Just as definitely it's not thermals though.Anyone else tried to track this down? Any hints? Does it happen to people without FSUIPC?http://forums.avsim.net/user_files/162337.jpghttp://forums.avsim.net/user_files/162338.jpghttp://forums.avsim.net/user_files/162339.jpgRegards,http://www.bremmekamp.com/img/misc/avsim.jpg

It's some kind of thermal activity `problem`. I think it might be as simple as a line error in the code giving a factor of ten increase to thermal lift when using downloaded weather, which suggests either an interpretation error in compiling the Metar data, or possibly an error in the flight dynamics engine. I don't think its windshear.I've had it twice in the Mooney, where even going to idle and droppng the gear and speed brakes I still couldn't go down! Mooneys, like DC3's are not gliders! A good idea in principle, but a little excessive!Allcott

Notice elevators FULL DOWN ( or pretty close). Uncommanded? Maybe not thermal but control bug??Ed GreenKCLThttp://www.panelshop.com/Banners/DEV.jpg

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http://www.oncourse-software.co.uk/forum_images/fdc_beta.jpg

Hi all,I also had the problem with a raw FSX install (no addons) and metar downloading : the autopilot put me in this position in an attempt to keep the altitude ... since then, I observed several identical situations.With the lear I couldn't even land completely idle, flaps out, gear out and spoilers out around some mountain airport.laurentC

Try flying over Manhatten. It happens all the time doesn't matter if real weather is used. Once you get off the island, it is fine again. I though this was cool as NYC generates her own heat during the summer times. Then again, it happens in winter too. It isn't right.

No FSUIPC and No real weather needed - this is a "built-in" feature.. uh, bug.Yes, with Helicopters it's nearly impossible to land on any skyscraper in Manhattan - even without throttle (collective full down) and slow speed (<10knots) it produces lift.This is not a cool thing at all, This is ridiculous. Has MS got a report about this behaviour yet?Well, it's sad, but for me this is just another reason to finally switch back to FS9 which i can now enjoy full maxxed, thanks to my new hardware that were meant to run FSX...chrishna

>Notice elevators FULL DOWN ( or pretty close).Also notice I tried to fly level under these abnormal conditions. ;)>Uncommanded?Nope, intentional. I just didn't see how dropping out of the sky because of some weather bug would benefit anyone.Regards,http://www.bremmekamp.com/img/misc/avsim.jpg

>This is not a cool thing at all, This is ridiculous. Has MS>got a report about this behaviour yet?If so then this would be the perfect time for someone from the team to confirm this... *hint hint*Regards,http://www.bremmekamp.com/img/misc/avsim.jpg

Exagerated thermals perhaps. Or a sudden strong headwing although this would show as a rise on the airspeed indicator and would cause the nose to rise, I think. Then again if you are on autopilot and it is trying to maintain altitude then maybe but I think the effect is exagerated.Regards, Carlos

Yep that has happened to me also, mainly when flying over Seattle out of KSEA in my DF C177 RG (though also the default C172) and default "Fair Weather" loaded.I'll drop full flaps, drop the gear, throttle to idle, massive amounts of nose-down trim and manage (barely) to avoid climbing in an attitude similar to your pics. I'm around 1,500 alt when this is happening...Once I get past downtown Seattle, it's time to clean up and get back on the throttle to maintain alt as the "mystery updraft" has stopped.But it doesn't happen always. Sometimes I just get a bit of turbulence and a mild updraft that's easily countered with trim and a little throttle adjustment, and nothing else.Strange, but I kinda like it - keeps you on your toes!

Well i think it's rather silly, but I have found two ways to stop it, both of which detract from my enjoyment of FSX.1. Clear all weatheror2. Select the "Disable turbulence & thermal effect on aircraft" box. This can be found in the weather section of Display settings.Flying about with perfectly clear weather or with zero tuebulence & thermals isn't much fun, but it is very smooth.