1 hour ago, Bernard Ducret said:

I respectfully beg to differ Gerard, 

 personally I prefer a so called "overdone" replication than a "tamed" one, that reminds desk-chair pilots (especially GA ones) that they should remain alert over mountainous areas and disconnect their beloved A/P.  

Totally agree on both points.

I remember a couple of nasty turbulences over the Alps.

I would add MSFS predecessors have accustomed us to tamer flying environments and aerodynamics. We also see that with simmers complaining of difficult takeoff with 'uncontrollable' aircraft drifting left as they expect to drive along the runway roll  a powerful turboprop or WB like they used to in P3D or a 172 in MSFS... 

MSFS can be nasty indeed and I hope it stays that way.

Edited December 25, 20214 yr by Dominique_K

Imho the turbulence over the Alps is overdone. I never have seen cups of coffee flying in the air or people getting airsick in the 24 times I flew over the Alps in real life in 737 or 757.

If you look at my vid and imagine that this is normal then a smaller GA would be blown out of the sky …

Some extra turbulence over mountains is normal but this is not normal every day ….

18 hours ago, GSalden said:

This only happens over the Alps

And over the Rockies, the Andes, the Himalaya range, and quite a few other places wit mountains or relief, even in South Africa where mountains are far from being high... At least this is my experience when flying around, whether GA or airliners, whether real airplanes or simulator, but never thought this was too much. Again, a matter of taste.

Just this week, flying the HD B78X from RJAA to VHHH, I was facing 186knots headwinds at FL380... yesterday between ZSPD and EDDF at FL 320 over Mongolia with the Salty 748 crosswinds of 113 knots how do you think my rides were, certainly not smooth as silk, I can tell you big or small airplanes do feel turbulences even at very high altitudes. Once again, we need to be more precise when complaining about a particular parameter, where (geographical area), when (time and date), weather with winds aloft (at the time of the flight), Sigmets or not. The rest remains personal speculation, good or bad.

Edited December 25, 20214 yr by Bernard Ducret

18 minutes ago, Bernard Ducret said:

And over the Rockies, the Andes, the Himalaya range, and quite a few other places wit mountains or relief, even in South Africa where mountains are far from being high... At least this is my experience when flying around, whether GA or airliners, whether real airplanes or simulator, but never thought this was too much. Again, a matter of taste.

Just this week, flying the HD B78X from RJAA to VHHH, I was facing 186knots headwinds at FL380... yesterday between ZSPD and EDDF at FL 320 over Mongolia with the Salty 748 crosswinds of 113 knots how do you think my rides were, certainly not smooth as silk, I can tell you big or small airplanes do feel turbulences even at very high altitudes. Once again, we need to be more precise when complaining about a particular parameter, where (geographical area), when (time and date), weather with winds aloft (at the time of the flight), Sigmets or not. The rest remains personal speculation, good or bad.

A large jet “feels” less turbulence than a smaller plane. 

I have felt turbulence before but what I experience over the Alps in each flight, every day of the year, clear weather or bad weather is always the same.

It isn’t terrible over the Alps 24/7 ..

Currently in a flight from Adam to Nice. Within 25 minutes I will be flying over the Alps.. 

Edited December 25, 20214 yr by GSalden

21 hours ago, GSalden said:

Still overdone. 🤢

 

What aircraft are you using in this video? 

Gerard, did you notice your winds aloft of 83 knots coming from your right (249° versus your heading of 140°)? I never said that airliners and GA planes would feel the same amplitude of turbulences, but they ALL feel a certain degree. Again refer to your case: you have a crosswind of 83 knots at your FL 350 over mountain ranges culminating at 10'000 feet (MSA around 11'000 in the area), do you believe that this combination of factors would have zero effect on your plane, now how strong this should be is a matter of personal appreciation, but very frankly, you have all the ingredients for a bumpy ride.

1 hour ago, Saucey12 said:

What aircraft are you using in this video? 

prosim 737, and i think the real problem here is that the autopilot is chasing the level and cant keep up. I wonder what it would like with the aircraft trimmed to a stable IAS and AP out  

I'm a bit confused by this discussion. Does Prosim have an MSFS product that I haven't heard about? Is the Prosim AP response tuned to the MSFS flight model? If not, is this an MSFS problem or one that's due to Prosim? Has the OP tried flying a CJ4 across a similar route under similar weather conditions, for example?

Also, I recall being told that in the event of significant turbulence IRL, it would be best not to try to maintain a constant altitude and course, but rather to maintain wings level and a constant pitch angle. This might well not be the case for a commercial airliner, however, but in smaller aircraft, it does obviate the need for constant trim adjustments, etc.

1 hour ago, kand said:

prosim 737, and i think the real problem here is that the autopilot is chasing the level and cant keep up. I wonder what it would like with the aircraft trimmed to a stable IAS and AP out  

Might be true. All depends on communication between Prosim and MSFS.

The better the SDK/Simconnect gets the better the Prosim team can anticipate on it.

- - - 

My flight today to Nice also had turbulence over the Alps but less.

 

17 hours ago, GSalden said:

If you look at my vid and imagine that this is normal then a smaller GA would be blown out of the sky …

You know. There is a very good reason us GA flyers should check the issued turbulence warnings before we head out on x-country legs. (And watch for lenticular clouds / rotor clouds - they might flip you over or break your plane)

Tragically, if we are not careful, our light airplanes will get blown out of the sky... This was a DR400 taking off behind an Antonov 2 (wake category LIGHT, same as the DR400) that departed 40 secs prior. 

Hopefully you have recieved some pointers how delicate a GA is.

Rotor clouds and lenticulars are my preferred weather scenario IRL, yet I learned the hard way to respect as much as admire and accept their help to bring me up with my glider in such a unique way.

I remember the day my glider tug, a Rallye Commodore 180, was flipped upside down while tugging a fellow glider pilot... All he had was time enough to release the cable, and miraculously the tug pilot managed to get blue-side-up again. Those were great times near Serra da Estrela in Portugal, when it was still possible to fly from the now closed ( due to political and capitalist interests... ) Covilhão aerodrome LPCV.

But it's at quite higher levels that the "rebounds" from the waves can affect aircraft cruising above those areas. Just as CAT and WAKE turbulence, the wave turbulence can become really challenging, to say the least.

In a glider we learn to profit from it without risking...

ASOBO already mentioned "soaring / glider series" for MFS. This, together with the recent announcement y Austin Meyer of the changes to X-Plane weather model allowing for better soaring weather, make me look fwd into the cance of one day being able to experience in these platforms something as close to reality as possible to my experience with the good old glider simulation tittles - SFS v3 and v4, then Slient Wings v1, then Condorsoaring...

Maybe one day I can find the physical, mental and budget space for something like:

https://www.youtube.com/channel/UClQKxrQjSESgucJ1eJW4hfw/videos

Sorry for derrailing the OP :-./

Funny, after reading this thread the other day I took a flight in the pmdg dc-6 out of denver over the Rockies and experienced some gnarly turbulence. At first I thought there was something wrong with the plane, nope, it was just crazy turbulence.   I cant wait for MSFS and Asobo to get their act together with the weather and technology to be able to determine enroute weather.  I dont really want a newish 3rd party weather app or anything, not unless there's something to the equivalent of ActiveSky one day, which i hope their will be.  

It might actually be quite realistic. I'm not sure how how aircraft can cope with it. Like in counteracting to the longer up/down lift turbelance you shown in the video's. (I like the setup! 👍)

https://www.boldmethod.com/learn-to-fly/weather/how-mountain-wave-forms-and-the-dangers-it-can-create/

There was also a thread here: https://forums.flightsimulator.com/t/turbulence-over-mountainous-terrain/418800

 

Flying over high mountains, turbulence is to be expected. 

13 minutes ago, Bobsk8 said:

Flying over high mountains, turbulence is to be expected. 

That is true, but imho it looks overdone in MSFS .

Wheh flying at 37.000 ft over the Alps cause a 737 being tossed around like a Cessna every day of the year imho it is overdone.

But I guess weather needs to be finetuned further in MSFS and the SDK/Simconnect needs to be improved too for studie level ac like PMDG/Prosim to function properly….

Edited December 26, 20214 yr by GSalden