forshaw

Auto Pilot keeps disengaging -747 V3

Recommended Posts

Hello;

I just purchased the 747 V3 today and just wanted to do a quick free light (no flight plan) just to get a quick feel of the aircraft's handling and set up. As I got above 5000 feet I set my altitude to 10,000 set the Rate Of Climb and engaged the Auto Pilot.

It stayed engaged for approximately 15 seconds then the Primary displayed showed Auto Pilot (in orange) and then it disengaged with the alarm. I tried several times using different attitudes, different Rate Of Climbs, different throttle settings, different speeds but always the same issue.

Now, I have been flying the 747 for a long time, 1) The initial PMDG 747 when it came out. then the other make 747, (begins with an i) not sure if I am allowed to mention the other product on this forum, and now I am back to the new PMDG. I was always able to fly manually setting the AP without a flight plan. I combed the multiple manuals to see if there was something I missed but couldn't see anything.

I actually bought the product to get the 747-8i which I will purchase sometime next week .

Also, how can I hide the Pilot Seat completely or adjust all the way back. It is actually obstructing my instruments forward view. I looked at the settings options in the FMC but I only saw the option to hide the "Seat Headrest." Please tell me that there is a way to hide it.

Great aircraft by the way.

Any help you can provide would be greatly appreciated.

Thanks.

Kindest Regards.

Forshaw.

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Just now, forshaw said:

Hello;

I just purchased the 747 V3 today and just wanted to do a quick free light (no flight plan) just to get a quick feel of the aircraft's handling and set up. As I got above 5000 feet I set my altitude to 10,000 set the Rate Of Climb and engaged the Auto Pilot.

It stayed engaged for approximately 15 seconds then the Primary displayed showed Auto Pilot (in orange) and then it disengaged with the alarm. I tried several times using different attitudes, different Rate Of Climbs, different throttle settings, different speeds but always the same issue.

Now, I have been flying the 747 for a long time, 1) The initial PMDG 747 when it came out. then the other make 747, (begins with an i) not sure if I am allowed to mention the other product on this forum, and now I am back to the new PMDG. I was always able to fly manually setting the AP without a flight plan. I combed the multiple manuals to see if there was something I missed but couldn't see anything.

I actually bought the product to get the 747-8i which I will purchase sometime next week .

Also, how can I hide the Pilot Seat completely or adjust all the way back. It is actually obstructing my instruments forward view. I looked at the settings options in the FMC but I only saw the option to hide the "Seat Headrest." Please tell me that there is a way to hide it.

Great aircraft by the way.

Any help you can provide would be greatly appreciated.

Thanks.

Kindest Regards.

Forshaw.

BTW I am using FSX.

Forshaw.

Share this post


Link to post
Share on other sites

As far as the autopilot issue, can you confirm all your controls are in neutral? In other words, no aileron or elevator input.

Share this post


Link to post
Share on other sites

@forshaw

I get that quite often after I have hand-flown to say 5000ft, which I always do, and then ask the Co-Pilot(in Fs2Crew) to engage AP, and if my MSFF2 Sidewinder joystick, which is now getting on in age over 15 years old, spikes due to not being centred correctly, it will trigger the AP disconnect followed by the wailer. Check that first.

 

Share this post


Link to post
Share on other sites

It is very likely your yoke or joystick.  In the menu there is a selection that will turn off joystick spikes or something like that and it should fix the problem.  There is more on that in other threads on this forum so you can search.  As said above official support has moved but I am sure you will find the answer here.

Share this post


Link to post
Share on other sites
13 hours ago, DavidP said:

The official forum has moved here now if you need support

http://forum.pmdg.com

No one from PMDG are here anymore.

Thanks DavidP. Funny I just bought the bird and the support sent me here (which I have know for a long time) and then they moved🤔. I will visit the site shortly. This forum is excellent for sharing and obtaining useful information, so will still jump in to find useful things and advice.

Best Regards.

Forshaw. 

Share this post


Link to post
Share on other sites

@Rick / Mark thanks for your input I really appreciate it. Makes sense, My controls are over 15 yrs old and I do plan to replace it in a few weeks but in the interim I will do what you folks suggested.

Thanks again.

Kindest Regards.

Forshaw.

Share this post


Link to post
Share on other sites
7 minutes ago, forshaw said:

@Rick / Mark thanks for your input I really appreciate it. Makes sense, My controls are over 15 yrs old and I do plan to replace it in a few weeks but in the interim I will do what you folks suggested.

Thanks again.

Kindest Regards.

Forshaw.

Glad we could help. I have just replaced my Microsoft Force Feedback 2 Sidewinder---excellent in its heyday----with a Logitech 3D PRO. Worth the money. One of the best I have bought.

Share this post


Link to post
Share on other sites

I have the same problem and above solutions don't apply, it has to do with the latest 747 update that has murdered both the -400 and -8 versions. The 737 and 777 are ok. Also note that the FSLabs A320 has a delicate autopilot requiring some adjustments to null zone and sensitivity settings, and that one I have no problems with either. It's definitely something with the latest 747 update and I'm surprised most people don't experience it. I went to pmdg new forum but it looks unfinished and I don't know where to post there.

 

Share this post


Link to post
Share on other sites

ps I was able to engage it at cruise level with null zones set to very high (unacceptable for hand flying), then it disengaged on descend, same twice (2 flights), had to fly it manually on climb and descend. Don't mind it below 1000 ft but hand flying up or down from cruise level is a bit too much for me.

No good, nicht gut, no esta bien, pas bon, ne horosho, nie dobrze, this needs pmdg's attention.

Share this post


Link to post
Share on other sites

To be honest, it sounds a lot like you have a hardware trim axis that isn't being cleared.

The last update didn't change anything in this regard that would affect anything like this, to be honest.

Share this post


Link to post
Share on other sites
Just now, scandinavian13 said:

To be honest, it sounds a lot like you have a hardware trim axis that isn't being cleared.

The last update didn't change anything in this regard that would affect anything like this, to be honest.

hm, may be. My trim however is not assigned to an axis but to am up/down switch on you yoke. I do have a problem with yoke: the vertical axes is not centered and the physical neutral condition is actually giving a slight downward input on the elevators. The CH yoke is 4 years old (bought brand new)  and the problem has developed within a year of purchase. Nevertheless it doesn't spoil the experience with other planes.

also Kyle, remember you taught me how to fly sids and stars couple years back? Can you now teach me how to fly sids and stars with analogue instrument cockpits like a DC-9 or 727?... ; ))) There are still DC9s flying for cargo carriers in US and Europe and it totally bugs the heck out of as to how in the world they are doing it. I don't think they are exempt from it and I don't think they are using GPSes. Delta Airlines was using 737-200s in mid 2000s and they had no GPSes in them. I've seen a frooglesim video where he showed a small SID execution with a DC9, that small one was a nightmare to do tracking a VOR signal with 2 VOR instruments simultaneously, but how do they fly a big one?  Some stars (like KATL or KDWF etc) are very long and consist of many waypoints, and no VORs around... Mystery.

Share this post


Link to post
Share on other sites
1 hour ago, alexzar14 said:

hm, may be. My trim however is not assigned to an axis but to am up/down switch on you yoke. I do have a problem with yoke: the vertical axes is not centered and the physical neutral condition is actually giving a slight downward input on the elevators. The CH yoke is 4 years old (bought brand new)  and the problem has developed within a year of purchase. Nevertheless it doesn't spoil the experience with other planes.

This is probably the main issue. Either make sure it's calibrated (and then re-do your null zone calibration), or get new hardware (not ideal, I know).

1 hour ago, alexzar14 said:

also Kyle, remember you taught me how to fly sids and stars couple years back? Can you now teach me how to fly sids and stars with analogue instrument cockpits like a DC-9 or 727?... ; ))) There are still DC9s flying for cargo carriers in US and Europe and it totally bugs the heck out of as to how in the world they are doing it. I don't think they are exempt from it and I don't think they are using GPSes. Delta Airlines was using 737-200s in mid 2000s and they had no GPSes in them. I've seen a frooglesim video where he showed a small SID execution with a DC9, that small one was a nightmare to do tracking a VOR signal with 2 VOR instruments simultaneously, but how do they fly a big one?  Some stars (like KATL or KDWF etc) are very long and consist of many waypoints, and no VORs around... Mystery.

I'm betting you're looking at RNAV STARS. Those can't be flown "ANAV" (old school analog methods of navigation). Find a STAR that doesn't say RNAV on it, and then just take your existing knowledge of tracking VORs to waypoints, and then combine it with what you know about SIDS and STARS.

Share this post


Link to post
Share on other sites
2 hours ago, alexzar14 said:

There are still DC9s flying for cargo carriers in US and Europe and it totally bugs the heck out of as to how in the world they are doing it. I don't think they are exempt from it and I don't think they are using GPSes.

Certainly in Europe it's highly unlikely that the aircraft you refer to are still doing radio nav: in the vast majority of European airspace these days RNAV equipment is mandatory and at the rate VORs and NDBs are being decommissioned it's simply not possible to navigate along airways that way any more, even if it were legal. It's likely that such aircraft will have been retrofitted with at least some form of basic RNAV kit. I think the US airspace system is still relatively VOR-heavy though.

As Kyle says though, assuming you are looking at conventional navigation procedures, the answer is -- it's old-school hard work requiring a bit of pre-planning (i.e. think about what you want tuned on which box and when) and a lot of concentration; and this is how essentially all instrument procedures were flown in the (not all-that-distant) past, raw data and quite possibly by hand (as autopilots in the past weren't often as capable as modern types and may not have been capable of automatically capturing and tracking a VOR radial).

Having a friendly co-pilot to tune the radios and talk to ATC, and perhaps a Flight Engineer to take care of the checklists and systems, was obviously an advantage....

 

Share this post


Link to post
Share on other sites

Thanks that's a start. I believed it is not up to you to select a sid or star. When you get a real flight plan (I use FSCommander with online connection to flight plans), it gives you a plan that starts and ends at a certain waypoint. It may vary from day to day. So you have to insert a sid that ends at the first waypoint on the plan and then insert a star that starts at the last waypoint of the plan (by the way sometimes wind changes direction on final and you have to scrap the whole star/transition, another question I'll ask other time, now now).

So if I find any small STAR that isn't RNAV, it will not fit into flightplan, there will be a break (a dead zone) between the last waypoint of a plan and the beginning of a star. I guess I can ignore it and fly thru the dead zone but I'm not sure it's ok in real life ;))) Ok I'll see what I can do and we can have another topic then. As for the yoke, I'd hate to replace it since it's giving me a problem only with PMDG 747. It's my 2nd CH yoke, it seems it isn't very reliable so if replacing I should probably look into Saitek.

Share this post


Link to post
Share on other sites

skelsey the subject is about flying the analogue tech planes in modern times, which is even more complicated then back in the day because you are required to follow this "mini route" (c) as Kyle calls the sids and stars ))) And you brought up an interesting point: most of the average flightplans today can't be done in VOR mode. So I can continue using the GPS and not worry about this method as "cheating", I guess. So the DC9s and the 737-200 that Delta flew less than 10 years ago had GPSes in them?

Speaking of concentration required to fly it the old way, indeed I find it very hard, nearly impossible to do a small VOR based sid with so much going on and semi-automated autopilot that needs inputs. Simmers of any nationality are very  intelligent people, I am somewhat below that level of talent ;))))

Share this post


Link to post
Share on other sites
52 minutes ago, scandinavian13 said:

This is probably the main issue. Either make sure it's calibrated (and then re-do your null zone calibration), or get new hardware (not ideal, I know).

2 hours ago, alexzar14 said:

So yes that was my problem, my original post. The Yoke was not centered correctly. I engaged the auto pilot and when it disengaged I adjusted the yoke about 2 clicks, reengaged the auto pilot and the problem want away. The Yoke was not centered precisely, which is interesting since all of the other add-ons I use including the PMDG 747 V1 & 737 wasn't that sensitive. Since my  hardware is approximately 15 yrs old I am replacing it soon anyway..

Forshaw.  

Share this post


Link to post
Share on other sites
11 minutes ago, forshaw said:

So yes that was my problem, my original post. The Yoke was not centered correctly. I engaged the auto pilot and when it disengaged I adjusted the yoke about 2 clicks, reengaged the auto pilot and the problem want away. The Yoke was not centered precisely, which is interesting since all of the other add-ons I use including the PMDG 747 V1 & 737 wasn't that sensitive. Since my  hardware is approximately 15 yrs old I am replacing it soon anyway..

Forshaw.  

In my case calibration does not help because my yoke has a faulty mechanism, both P3D and Xplane-11 see the vertical axis being pressed downwards when the yoke is in neutral. The horizontal axis is centered but the vertical is offsetted and the sim thinks I am pressing on it, when I'm not. I'll make and upload a pic when I get home.

Share this post


Link to post
Share on other sites

You can turn off the option that disconnects the A/P when the yoke is not centred or you bump it accidentally.  The option is in the FMC...not at home right now to check where, but that's how I have mine set up.

Share this post


Link to post
Share on other sites
1 hour ago, netshadoe said:

You can turn off the option that disconnects the A/P when the yoke is not centred or you bump it accidentally.  The option is in the FMC...not at home right now to check where, but that's how I have mine set up.

Thanks I'll check it out tonight (typing from work too). I did scroll thru all the fmc system and pages and didn't notice anything of this nature, next time will pay a closer attention.

Share this post


Link to post
Share on other sites
1 hour ago, netshadoe said:

You can turn off the option that disconnects the A/P when the yoke is not centred or you bump it accidentally.  The option is in the FMC...not at home right now to check where, but that's how I have mine set up.

Great thanks I didn't realize i had that option in the FMC. Like Alexander said, I didn't see that option as I combed through the FMC as I try to get familiar with the functions and options. I will check again when i get home later. I am used to getting a separate config tool which easily lays out all of the options which you can easily review and select. I understand PMDG wants to be "As Real As Ii Gets" in the real world using the FMC for everything. But for things like this, could have been done outside of the FMC. Just my 4 cents.

Thanks again for the info.

Forshaw. 

Share this post


Link to post
Share on other sites

Check page 100 and 102 of the intro manual. One of those options should be what you're looking for.

Share this post


Link to post
Share on other sites
39 minutes ago, Captain Kevin said:

Check page 100 and 102 of the intro manual. One of those options should be what you're looking for.

Thanks Cap, I really appreciate it. Will do it when i get home. Funny, I am sure I did a search but it didn't come up. Who knows what document I searched😄.

Since I have got you I have a quick question; is there a way that you know of to move or remove the pilot seat completely? I did have it in my original post but it was burred in the AP Disengage post. Regardless on how I set up my views standalone or Ez Dock the pilot seat obstructs my view of the instruments. I have tried everything but can't seem to get it out of the way. I will post it on the new PMDG site, but I assume just try here first since there are so many users here.

Thanks.

Forshaw.

Share this post


Link to post
Share on other sites

The seat itself, no. I don't think it's possible. You can remove the headrests via the FMC. That would fall under aircraft equipment.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now