Globe Cargo

From time to time, I experience very strange altitude, and especially uncommanded radical speed changes with what appears to be weather updates. This occurs occasionally at altitude (i.e. FL350, 370, etc with FS2004) with B744F and AS6. I don't know if it is a result of a corrupted weather file or exaclty what, but it can easily result in wild toad ride just to keep from losing control. I always use the AS6 'New Route' flightplan processing feature, but sometimes it doesnt seem to make a difference with uncommanded speed range from M60 to M99 ! I am concerned this reflects negatively through postflight PIREPS.

Any information and/or comments are appreciated.

Les, are you experiencing these things when on trans oceanic flights? This is a known issue when over the ocean a ways out. It is almost like you hit the line for winds to change and then all the sudden its drastic.

There is a setting in FSUIPC (don't know if it requires the registered version) that lets you minimize the effect of rapid wind changes.

Thanks for the information. It has been a very bad day for myself and this flight. In spite of an additional FS2004 ATC.dll crash, I will have to do this flight once again.

mlegein wrote:There is a setting in FSUIPC (don't know if it requires the registered version) that lets you minimize the effect of rapid wind changes.

Active Sky is suppose to take care of that.

I,ve just finished a flight from PANC to LINC , about 2,500 mls, now this was one of my first flights using FSX ,as I have just upgraded my RAM, I couldn,t use FSX before as I have the the PMDG FSX Freighter and it uses a helluve lot of Memory, anyway during the course of the Flight at intermittent periods I was getting some strange behaviour from the Aeroplane, it would start speeding up , lose Altitude, swing violently from side to side, I would bring it back under control and everything would be ok for awhile and then it would start again, and the landing was difficult as the Aeroplane was crabbing , but there were no wind problems as far as i could make out , I use Real Weather and AS6 except when I go across any of the Ponds, because of the known problems with it vis a vee Trans Oceanic Flights, also it would veer quite a few miles off course, anybody else had these kind of problems using fsx ?

I don't use FSX, but I recall seeing in the PMDG forum the issues that you have just described. If my memory serves me, It has something to do with ActiveSky, FSUIPC, and the PMDG 744 all used together. I also recall seeing some threads on this issue in Pete Dawson's FSUIPC forum over at SimFlight. You might want to go over there and take a peek. Hope you can get this issue resolved.

Regards,

Robert

RCR wrote:I don't use FSX, but I recall seeing in the PMDG forum the issues that you have just described. If my memory serves me, It has something to do with ActiveSky, FSUIPC, and the PMDG 744 all used together. I also recall seeing some threads on this issue in Pete Dawson's FSUIPC forum over at SimFlight. You might want to go over there and take a peek. Hope you can get this issue resolved.

Regards,

Robert

Thanks Robert, will do !

Mike, remember the flight we all took to PHNL on the Cargo Extravaganza? Those of us that were using AS were experiencing this. I remember I even was approaching stall speed at one point. It required the use of full power and disconnect of the autopilot as well. After a while it seemed to level out and go back to normal. This anomoly has been the demise of many a sleeping FS pilot on their trans-oceanic voyages.. LOL Setting FS up and going to bed only to wake up and find their aircraft reset back on the tarmac of the original departure point, or if they dont have automatic flight reset selected, they are nosed into the ocean.

Bryan is right, it happened to me during this PHNL flight and many other times accross the Atlantic. I briefly searched the Dawson's forum but could not find anything, any idea anyone?

Luc

Well Guys I had a cursory glance at the PMDG Forum yesterday but I didn,t find anything of any particular relevence, it will need more dilgent searching or I may post the question on there. The problem with the Trans-Oceanic flights vis AS are well documented and I never use it while crossing the Pond, but this last 744 flight from PANC to KILN was the second time this has happened on FSX with the 744 and the last time I wasn,t using AS, the add-ons I used were, FDC,Weather d/loads through FSX, and GCP, so I,m baffled, i might try a flight with the 744 minus any extra add-ons and see what happens, it could be a Bug in the Aeroplane but I doubt it ! it could just be the 15 min Weather updates, but then again I,ve never had any problem on FS9 with those nor while I,m flying the ATR on FSX

From what I read, its definately a bigger problem with the PMDG 744X and ASX. Also, the HiFi Sim people mentioned that the weather in FSX is written like this so no matter what weather enhancer you use. It has something to do with weather layering that MS used in FSX. For what it is worth, the MD-11X works really well in FSX with ASX in use. I did a flight with it last night from LAX to HNL with really no wind shift effect, so maybe the fact that the MD-11X was written completely from scratch for FSX as opposed to the 744X being an update may have some sort of issue.

Below is the reply from one of the PMDG Team ,seems to tally with what you were saying Allen !


Hi,

What you experienced *is* FSX's infamous weather shifting, even if you didn't notice anything immediately unusual. The wind can unrealistically shift violently many times per second and you can get sudden temperature and pressure changes that cause controlability issues like this. I've seen it myself numerous times.

It's a well known problem, especially when using real world weather. There's no solution that completely fixes it, but using Active Sky X in conjunction with registered FSUIPC 4 weather smoothing is the best thing you can do.

Ryan Maziarz