Hi all,

 

I have recently found out this small bug, but quite annoying. Every time I fly an amber HDG warning appears on the ND. In fact the HDG is not aligned with the mag heading by a few degrees (over 10 sometimes). The procedure I follow is always the same, from C&D I wait for all the systems to initialize, align, etc, then I start up. At first there is no warning, but after a while it appears. Then disappears while in flight, to reappear again later...what am I doing wrong? I don't know if there's a way to manually adjust it but I don't think so...fact is if I click the HDG button on the A/P the bug is positioned on the correct heading (example: I'm on a mag hdg 360°, the ND indicates 010°, but the hdg bug is set to 360°correctly but misaligned from my ND, which is having the issue..)

 

maybe I misconfigured something somewhere..? I never had this issue before, but the JS remained in my virtual hangar for quite some months, until I dusted it off a couple of weeks ago.

 

Thanks for your help

 

Cheers

Fede

What do you mean by warning? How does it look and/or sound?

 

 

The ND shows track, not heading. The heading bug enters a heading and points the aircraft's nose that direction, but the ND show the actual track over ground. For exampe I am now flying with a 20 knot wind from the left, this means my track will be to the right of my heading, because the aircraft is blown of course by the wind.

 

Further reading if you're intrested:

http://www.recreationalflying.com/tutorials/navigation/wind.html

 

Or just google "track made good" or similar.

Call it HSI then I call it "warning" because it's an amber sign. In the JS41 anyway, it's not that track which is shown, but the actual heading. It's not as complex as a boeing or airbus. The HSI should be aligned with the compass all the time, thanks to the automatic control. In my case it drifts like a C172 gyro, that's what I mean, and the warning appears telling me it's not in synchro. But there's no way to fix it while flying as it should be a process made by the system on startup (levelling?I don't remember..) only.

 

Cheers

Fede

Ah sorry, I for some reason thought you were referring to the NGX..

 

Anyway, I may have missed it but I can't find in the manuals if it is the track or the heading that is shown. But maybe it's just because I'm tired...

LOL you forgot to check in what forum I was posting No problem. I hope to sort it out..

 

Cheers

Fede

What about a screenshot?

 

Here you go. You see I was flying on a 290 HDG, but here it shows 300 with the warning. There's also a C on the PFD, but I don't know if its' ok or not, I nover noticed it before, and don't know if it's related or not. After a while the plane restarted flying 290 with 290 shown correctly centered and no HDG warning. Wind was kinda null, like 3 knots crosswind. If I push the HDG button on the A/P, the heading bug is centered on the actual correct hdg, like in the image shown above. So the plane flies correctly on th A/P, but flying it manually is almost impossible, because I don't know where I'm going!!

 

Cheers

Intresting, if I remember it tomorrow I'll make another dig through the manuals and see if I can find any reference to that.

 

BTW where did you get the weather radar from? And more intrestingly is it working properly?

The WXradar is the Reality xp, and it's configured by default with the JS installation (which is awsome!). Working nicely, as far as FS limitations allow. More or less heavy precipitations and clouds are shown where they are, and working with the tilt can even tell you their height.

 

I didn't find any reference in the manual about that warning. Let me know if you can.

 

Cheers

I had the same HDG warning a couple of weeks back. I may be totally wrong, but I THINK it was because the set course for the HSI is not the same as the ILS final course.

 

I only saw it once, so can't be sure.

 

Carl Kohrs

Also, unlike the NGX (in some configurations), the J41 HSI shows aircraft heading and not track. I see from you screenshot that you have LNAV engaged as roll control. Therefore, the reason for the "misalignment" is simply a crosswind. The autopilot is flying the FMS route, and your heading bug is only there for standby.

 

I have never seen the C on the AH. So I don't know what it is.

 

Carl Kohrs

Also, unlike the NGX (in some configurations), the J41 HSI shows aircraft heading and not track. I see from you screenshot that you have LNAV engaged as roll control. Therefore, the reason for the "misalignment" is simply a crosswind. The autopilot is flying the FMS route, and your heading bug is only there for standby.

 

I have never seen the C on the AH. So I don't know what it is.

 

Carl Kohrs

 

I knew this would have come out, that's why I said I was flying in no cross wind. There is no crosswind correction, it's plain wrong. It happens on the ground too, after pushback. You see in the picture I'm climbing straight? I am heading 290° (heading, and tracking) confirmed by the compass, hence why the HDG bug aligns on 290 being off-centered. If I disengage the A/P LNAV and engage HDG mode, it's just the same. But the heading "in the middle", say, is 300, not 290. I don't know how else to explain this. In a system like you said I'd have the hdg centered on 290°, the track shown to display the drift left or right, but the heading you are flying will be always in the middle (unless there is an option to "fly the track", I don't know).

 

I had the same HDG warning a couple of weeks back. I may be totally wrong, but I THINK it was because the set course for the HSI is not the same as the ILS final course.

 

I only saw it once, so can't be sure.

 

Carl Kohrs

 

This could be more interesting, but no I wasn't flying an ILS, probably still on a SID or just left it. Did you do anything to correct the warning, or it just disappeared?

Ok I think I'm missing something then. The picture of the ND looks perfectly normal to me, except for the fact than you are saying you align heading and it goes to the left, and that there is no crosswind. Also sorry for missing that you did not have a cross-wind.

 

On the ILS course, you do not need to be flying an ILS approach, just have an ILS frequency tuned. From your screenshot it looks possible, looking at the frequency on the standby radio set and the DME display.

 

Once again I may be totally wrong here, I'm not at home to check my facts on the J41.

I'll see if I can post a picture of a "normal" ND so you can see the difference. The frequency you see is KOS VOR (ILS's have odd numbers after the dot, even numbers are for Terminal VOR's). Thanks for the info anyway, I'll check it out next flight :wink: It happened again yesterday as soon as the system booted up, so I gave up immediately.. :Cry:

 

Cheers

I think the HDG warning came after I did a magnetic declination update (as per the PMDG general forum post) so maybe it has something to do with that. Otherwise I am out of ideas, and can only revert to the standard fixes of reinstall, etc.

 

Good luck, let us know if you find the solution.

 

Carl Kohrs