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GoneMissed

Autopilot issues in the 747 and 777

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G'day all,

 

First off, apologise if I am posting in the wrong place. The issue relates to both the 777 and 747 so was unsure of where to post.

 

I have been having some autopilot issues in the 777 and was actually going to post on here yesterday, but ended up not. After getting the 747 and experiencing the same issues in the new (old?) machine, it is definitely time to try and get this sorted out.

 

So the issue I am having is the aircraft unable to maintain heading and altitude. A few examples: 777-300ER on the SID leaving YMML, later on in the cruise on the same flight, same aircraft crossing the northern Atlantic, and most recently today doing the KDEN-KSFO tutorial flight in the 747. Essentially the aircraft deviates from track before correcting itself, and/or deviates from altitude by up to 50 feet. I use AS16 and have SP1 installed, and my initial thought was this was the culprit. After turning off AS16 mid-flight during these occurences the effects were drastically minimised, but the aircraft was still misbehaving. Today, doing the tutorial flight I did not open AS16 and ran with the P3D Clear Skies preset as recommended in the tutorial.

 

I've attached bunch of screenshots. The most dramatic ones are with AS16 running (the first few 777 shots), the rest are using default P3D weather. I experience this in the 777 and 747 only, have never had this in the NGX, and for what it's worth, never in the Aerosoft A320 or Q400.

 

2017-1-30_9-19-3-371_zpswbfesidc.png

 

2017-1-30_9-29-33-607_zpszwdqngmy.png

 

2017-1-30_9-19-57-541_zpsxlgsivk4.png

 

2017-2-1_14-2-9-419_zps9ezrvugc.png

 

2017-2-1_14-5-5-813_zps4tswjzw3.png

 

Cheers,

Joe.

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Turn down the turbulence slider in your weather program. Check the box for "disable turbulence effects on aircraft" in your sim.

 

Please have a look at our Intro Manuals, as well. We have some pretty detailed information that covers stuff like this.

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Turn down the turbulence slider in your weather program. Check the box for "disable turbulence effects on aircraft" in your sim.

 

Please have a look at our Intro Manuals, as well. We have some pretty detailed information that covers stuff like this.

 

Hi Kyle,

 

I wanted to bump this back up - I tried what you suggested and am still having erratic behaviour in all of my PMDG aircraft. To reiterate what I said in my original post, I am having issues with AS16 not even running, and with the P3D 'clear skies' preset.

 

Unfortunately am unable to submit a ticket as I do not receive the reset password email (checked junk/spam folder, nothing from you guys there) after a few attempts.

 

Hoping you're able to assist.

 

Cheers,

Joe.

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Joe,

 

Can you define "erratic?"

 

Also: for your support account, did you happen to use a gmail address?

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and/or deviates from altitude by up to 50 feet

 

Hi,

 

+/- 50ft seems perfectly normal to me. Nothing shocking there.

As for the lateral deviation how far does the aircraft go before going back to track? 

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Joe,

 

Can you define "erratic?"

 

Also: for your support account, did you happen to use a gmail address?

Kyle,

 

Did you take a quick look at the screenshots? I have had bank angle warnings and aircraft deviating off track by 45 degrees lately, my pax are livid! :)

 

My email is a Yahoo address. All other email and spam is coming through fine.

 

Cheers,

Joe.

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This is usually indicative of a CMOS battery or BIOS issue (something that's plagued ASUS for a while. The timer on your mobo is behaving erratically, which is causing the event timer to give our calculations bad timings, which will cause the AP to do weird stuff. If replacing the CMOS battery doesn't help, you may need to flash the BIOS.

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Interesting.

 

Thanks for the info Kyle. I wouldn't know how to go about replacing the battery but I'll do some homework. Will report back.

 

Theoretically, if the two steps you suggested didn't solve the problem - what would be the next step? I only ask out of curiosity as I find it an interesting (but frustrating) problem to have.

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I suggest using the fsuipc fix.In fsuipc make those changes:

 

(a) disable wind and cloud turbulence

 

(b ) disable wind smoothing allowing the FS turbulence effects to operate.

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Theoretically, if the two steps you suggested didn't solve the problem - what would be the next step? I only ask out of curiosity as I find it an interesting (but frustrating) problem to have.

 

Let's address at the issue at hand first before getting steps down the line.

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No worries, understand. Thanks for your help so far, it is appreciated.

 

Well replacing the battery was easier than anticipated, though unfortunately it didn't solve the issue. Neither did updating the BIOS. The good news is, my BIOS version is now the current one!

 

I've included a few screenshots of my P3D and FSUIPC settings. Won't post my AS16 settings as the program wasn't running while doing my test flights, all done on Clear Skies preset. The screenshot from the sim was taken only a few minutes ago. Some of the deviations are much less dramatic, maybe up to 5° of bank. If there's any other settings etc. that you need pics of, just let me know.

 

settings_zpsjtnkkzlw.png

 

2017-2-22_20-43-47-528_zpspiexracw.png

 

 

 

 

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The realism and display settings are great and all, but the question was about weather, and while you got display weather, we really need the actual affects-the-aircraft weather panel (thank you LM, for two sections both called 'weather'). You'll see it near the bottom under 'world'.

 

You can see in your picture that your AP is trying to re-center itself. With that in mind, I'm not fully convinced that your mobo issues are resolved. Have you noticed any other computer oddities? Difficulty connecting to wireless, etc?

 

To troubleshoot outside of that line: What are your frame rates during this time? What are your World - Weather settings? Have you followed the intro manual's recommended settings?

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G'day Kyle,

 

Bugger completely forgot about those other weather settings, I'll post those up when I get home.

 

My frame rates have been great lately, during that last test run it would have been early 40s in the VC.

 

The computer has no other issues I'm aware of, no wireless card so can't test that unfortunately. I'm not a huge gamer but everything I have has been behaving itself.

 

 

I have gone through the into manual but will do it again as a sanity check.

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Went in and checked, the only options on the Weather page under World in P3D settings are the preset/theme in use - I can post an image if you like, but the Weather Theme in use is Clear Skies until the problem gets sorted.

 

Also had another read of the intro manual and confirm I have the recommended settings etc. The only thing that jumped out was that I have my yoke, pedals and throttle calibrated through FSUIPC - this was setup after my very initial post and the problem existed in the 737 & 777 weeks before I created this thread with my X52 calibrated through P3D. I also have the options for CTL WITH AP ON = DISABLE, and REALISTIC AP ENGAGEMENT = OFF. The latter of which I changed recently as part of my own troubleshooting. I've just removed my FSUIPC.ini file though as suggested in the manual to no avail.

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G'day Kyle and team at PMDG,

Just wanted to check if there were any updates on this? Unfortunately this is not yet resolved.

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On ‎2‎/‎25‎/‎2017 at 4:50 PM, GoneMissed said:

G'day Kyle and team at PMDG,

Just wanted to check if there were any updates on this? Unfortunately this is not yet resolved.

Given the information at hand (and the fact that this isn't widespread), this seems to be an issue with your computer/config, and not one that we can fix on our end. You can see the FD attempting to recapture things in the screenshots, so it's rather clear that the plane is reacting to something that it's being handed, and not something that it caused.

Remove the fsuipc.ini and do not assign any axes through fsuipc - only assign them in the sim. You can usually process the axes through fsuipc, but for now, don't do that until you get yourself sorted. To be clear, you also went out to get a battery, took your comp apart, and replaced the cmos battery?

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Kyle,

This reminds me of the issues we had with FSX before Active Sky and FSUIPC came out with a fix for the winds aloft. 

blaustern

 

 

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Wilhelm,

Agreed. That was due to the plane getting pummeled with unrealistic g-forces, an issue that continued with some of the add-on weather programs, and we've tried to program around in the NGX and beyond. Still, his settings looked reasonable.

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5 hours ago, scandinavian13 said:

Wilhelm,

Agreed. That was due to the plane getting pummeled with unrealistic g-forces, an issue that continued with some of the add-on weather programs, and we've tried to program around in the NGX and beyond. Still, his settings looked reasonable.

I would venture that if the OP would press "Shift +Z" and get the actual winds in the upper left hand corner of the screen he would see the winds jumping back and forth by 180 degrees.

I do remember that FSUIPC had/has a wind control that helped a bunch and Active Sky came along and smoothed it out even more.

blaustern

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8 hours ago, scandinavian13 said:

Given the information at hand (and the fact that this isn't widespread), this seems to be an issue with your computer/config, and not one that we can fix on our end. You can see the FD attempting to recapture things in the screenshots, so it's rather clear that the plane is reacting to something that it's being handed, and not something that it caused.

Remove the fsuipc.ini and do not assign any axes through fsuipc - only assign them in the sim. You can usually process the axes through fsuipc, but for now, don't do that until you get yourself sorted. To be clear, you also went out to get a battery, took your comp apart, and replaced the cmos battery?

Thanks Kyle. Hope you had a good weekend mate.

After my last post I did delete the fsuipc.ini file and unfortunately that didn't help. I also tried physically disconnecting the yoke after engaging AP. Yesterday I uninstalled my PMDG fleet in hope a fresh installation of the aircraft would help.

Confirming I did physically replace the CMOS battery from my motherboard. I actually did it twice, the second thinking perhaps I needed to leave a battery out for longer - I took it out and left the computer alone for 10 hours with no battery and only replaced it when I got back from work.

Cheers.

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Just adding two shots of the B738 and B77L showing winds. It remained nil wind for both of my quick test flights, out of the default airport. In both cases the AP is on HDG SEL and both are struggling big time. This was with my yoke calibrated via P3D.

You can view images in higher res by clicking the image again after clicking the thumbnail. Noticed Photo Bucket was resizing my images too small so trying this out.

2017_2_28_9_1_20_921.png

2017_2_28_9_17_30_724.png

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2 hours ago, GoneMissed said:

Just adding two shots of the B738 and B77L showing winds. It remained nil wind for both of my quick test flights, out of the default airport. In both cases the AP is on HDG SEL and both are struggling big time. This was with my yoke calibrated via P3D.

You can view images in higher res by clicking the image again after clicking the thumbnail. Noticed Photo Bucket was resizing my images too small so trying this out.

2017_2_28_9_1_20_921.png

2017_2_28_9_17_30_724.png

Did you use the Shift+Z command to see what the sim thinks the winds are, not what the PMDG aircraft thinks the winds are?

blaustern

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1 minute ago, Bluestar said:

Did you use the Shift+Z command to see what the sim thinks the winds are, not what the PMDG aircraft thinks the winds are?

blaustern

Hi Wilhelm,

I did yes, if you take a look at those screenshots there is nil wind.

Cheers.

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