Well, I have been having a very strange turbulence problem. I'm very pleased with ASN. I never used Active Sky weather before. Used another for a while but was never happy with it. Used OPUS, and was happy with it, but no weather generator I've used has ever modeled the normal turbulence of most air that I experience when flying light planes. ASN does. It also models lift so much better and I'm finally able to use my sailplanes in FSX. Very happy about that.

But on four separate flights in light aircraft (RealAir Legacy and A2A C172) or gliders (Discus K and DG808) lately, at Jackson Hole and at Mt. Cook area in NZ, I have experienced catastrophic turbulence. Three different times at the Grand Tetons. These are the only four flights I've made near mountains since installing ASN. What happens is that after a while, and usually, it appears, after crossing over the tops of the highest mountains, at only about 2000 AGL, I experience turbulence that I would expect in a thunderstorm. The plane is thrown about the sky, I'm pushed up at a rate far beyond the instrument's ability to register it. I cannot maintain attitude control. I have crash detection off, or the plane would surely over-stress and reset. What I do is point the aircraft at the ground (in a way you can't in real life) and try to get back to lower altitudes. Eventually, the turbulence reduces and stops when I'm a few thousand AGL over the flat country. This has happened both during live weather and with the fair weather preset loaded into a 100 mile radius of my airport. So, I know it's not because of any real SIGMET that is present.  I've been flying in nice weather all times.  

This doesn't seem right to me. Has anyone else experienced this kind of behavior? 

One other note. I do have Accu-feel installed. Once the turbulence starts, I disable it, but it makes no difference. I've tried re-resetting ASN weather as well.  I will disable the turbulence effects in Accu-feel and see if that makes a difference.  

Anxious to hear your thoughts about what this might be. Perhaps a bug of some sort that shows up around high mountains at VFR and near VFR altitudes?

Griphos,

Have you tried altering the value of the turbulence slider in ASN Settings?

Settings at at their default values. Frankly, there shouldn't be any setting that could create these conditions in a clear sky.

Hint:  Avoid the lee side of slopes when there's much wind blowing.  Here there be turbulence.  Now, do they model rotors?  One person says he might have encountered one.

 

Hook

Yeah, I was hoping for rotors from this weather engine.  I've always hated the fact that flying in mountains in FSX is so tame.  But these flights weren't on the lee side of slopes.  In fact, they weren't anywhere near the slopes.  They were above them and beyond them, and on the windward side anyway.  In all cases, I was in clear skies near, but not right up against mountains (I'd say 4 miles away at the closest).  And I get tossed up into the sky, not pulled down into the ground as a rotor would do.    

 

I did some more testing last night at Ken Jernstedt, 4S2, in Oregon.  Mt. Hood is nearby, but I never got anywhere near there.  This is an open area surrounded by hills and low mountains.  I flew near the hills.  I did two different flights, and both times, turbulence built and built until it was impossible for me to descend and land.  I checked the debug window while it happened, and both times the winds had built to the 40s and turbulence was heavy.  The weird thing is that the METAR for the area was for 11kts gusting 18.  And the second flight I loaded the clear weather preset for a 100 mile radius.  It started at 4 kts, but was in the 40s with heavy turbulence within minutes.  

 

Something is not right here.  I closed ASN and weather returned to normal and I could descend and land.  So, it's definitely ASN that is causing this.  

 

No one else has experienced this, I'm assuming?