If you see the above screenshot, my plane is not on the waypoint, and is also slightly facing the wrong way. But overall the general heading seems to be correct. Anyone know why? Is this normal?
Wind Correction .
Wouldn’t its course still be on the line, though it’s heading would not align with it?
Looking at the image, it looks like a crosswind from the right, and the plane is oriented slightly in that direction. But it could still do that while on the right course, instead of off to the right. Perhaps the OP has heading mode enabled, and not Nav?
is your map all the way zoomed in? Zoom out a bit, and see if it looks more reasonable then. I don’t think it’s supposed to be within +/- 20 feet
What is your XTK (cross track deviation)? Also, heading is less important than your DTK (Desired Track) and track.
I second MortThe2nd on the map zoom, and TXTAVDan regarding wind correction.
This was my landing approach lol. I was able to land but almost skidded off.
@MortThe2nd it is like that even if I zoom out. Check out the screen above
@hobanagerik Pretty sure it was nav.
How do I account for wind correction, if that is really the case?
From the picture, it looks like you have the autopilot turned off?
Similarly, it might also be on a different part of the flightplan, normally the section you are using appears as a purple line (though not always!)
If you look below the VFR map, the heading is set to 240 (the white arrow above 240 !) so it is on course, just not the course you expected. It is easier to see on the right MFD for the right seat. There you can easily make out the white arrow â–Ľ pointing at 24 on the compass.
From his shot you can see from his PFD that the autopilot is on and in LNAV mode. It may be that he is not heading towards the correct waypoint?
Have you tried to do a Direct-To to see if the plane will stay on track afterwards? Or can you not do that in the 747 yet?
I can’t read anything on there, too blurry lol. But it is def on a heading set at 240 from that MFD.
Click the picture. The plane is flying that heading but the autopilot is in LNAV mode, not heading mode.
Yup LNAV all the way. Too late to try now since I landed already but are you suggesting toggle LNAV off then on?
Also this happens with A320neo as well but not as bad as 747.
FYI the 747 was an overnight flight from Dubai (OMAA) to Chicago (ORD). Different climates, barometric pressure, etc. Not sure if that has impact.
I did, I had it at 800% … still unreadable.
Maybe take a peek at this video…
I don’t think that was wind correction.
The MFD shows it was programmed to fly at 240, and it was flying at 240.
If it was wind correction, it would still be on track, just pointing to the left or right to account for the crosswind.
In this video, you can see the yellow cross on the MFD is the aircraft.
It is pointing to the left of flightplan, as there is a 50kt crosswind from the left and slightly behind.
Even though it is adjusting for that, it is still flying along the green flightplan path, just pointing a little to the left.
So what should I do to “fix” this issue? Any clue?
Could be the map not drawing great circle routes.
SInce youposted this, a few people have given you advice. I thought you would have been able to fix it with that advice.
So …
- Does it still do it?
- Does it do it on every flight?
- Is the Autopilot on?
- What mode is the autopilot in? (LNAV VNAV HDG buttons lit up green)
- Were LOC or APP lit up green?
- What did it say in the MFD window (the wording when you use FD that appears above the attitude/height/speed MFD — it is quite hard to see that on the photo above, as it is blurry with the NAV map on)
- If you can, a short video (youtube etc) showing them would be helpful
You can use this pic to tell us what was on and off if you can’t make a video or get a high res picture :¬)
This next image shows:
1 That the FD (flight director) is on
2 The aircraft is using HDG HOLD as it’s automatic heading (set by turning the HDG knob in the picture above, then pressing the HOLD button below it, which lights up green)
3 Altitude is set, and the HOLD button is on (below it, lit up green)
4 The purple dotted line shows the heading programed by the HDG knob, this line will disappear
This next image shows me in a flight, where:
1 The FD (flight director) shows the set altitude and direction as purple lines, and that the aircraft is heading on track
2 The autopilot is using the correct LNAV to follow the waypoints
3 THe heading knob is set to a direction different to the waypoints, which shows in of them labelled “3”
AND It is NOT using those, it is following a different path
4 The current part of the flightplan is PURPLE, in both the MFD and the VFR map
In your picture, the path is white. This is why I suspect you were either on a leg of the flightplan different to the one you were expecting, or you were in a different mode than waypoint following.
I have never been able to have my plane fly on the line, never did since release.
Absolutely silly to blame this on wind correction. If you zoom in close enough it does not “ride” on the line. If you zoom out it appears to be on the line, but if you do max zoom it does not.
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