747-400
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mSparks43
[IMPORTANT] Autopilot Issues (Should fix for V2)
Describe the bug
Major autopilot bugs which should be fixed before V2. More details and screenshots will be added later.
Bug reports:
- [ ] 1. Autopilot will occasionally turn the yoke 180 degrees so it is upside down, or even do a full 360.
- [ ] 2. Most of the time, autopilot controls aircraft correctly but does not actually move the yoke
- [ ] 3. When flying straight, the yoke is usually not straight, but a few degrees to the left or right, even in calm weather. The aircraft, however, flies straight.
- [ ] 4. There is too much oscillation when trying to acquire an altitude. ~~5. Autopilot can engage without Flight Directors~~
- [ ] 6. Speed bug glitches out if you try to set it above a safe speed, starts rapidly moving up and down, and the throttle follows.
- [x] 7. Are you sure you can set the altitude all the way up to 50,000 feet?
- [ ] 8. Autopilot reacts way too slowly, especially in pitch. I think this is the cause for the oscillation when acquiring an altitude, along with autoland landing like halfway down the runway.
- [ ] 9. I don't think you can arm more than one autopilot at once unless you're doing an autoland. Otherwise, you should only be able to arm one, if you try to arm another it will just disarm the first one.
- [ ] 10. Moving the yoke while autopilot engaged should either disconnect the autopilot or enable CWS mode (FMA will say "CWS R" for roll and "CWS P" for pitch.)
I honestly don't think the aircraft is ready for V2 until these are fixed. The autopilot is an important part of flight.
I think that dispite of the issues that are still present, the AP has improved massively in the last months. From my point of view fixing 6. and 8. would be more than enough for the next version...
I belive 6. could be fixed like this: The AP should not bug for a speed higher than the current flap setting allows nor should the AP bug for a speed lower than the current flap setting allows.
Number 1. is fixed @mSparks43 would have the fix number for that. As for the others, I've experienced them one time or another. 9. You can arm more than one autopilot for sure. That was in one of the CBT's. It was the one on autopilot, I would recommend watching it.
Number 1. is fixed @mSparks43 would have the fix number for that. As for the others, I've experienced them one time or another. 9. You can arm more than one autopilot for sure. That was in one of the CBT's. It was the one on autopilot, I would recommend watching it.
Tim is correct, you can't arm more than one autopilot except for Autoland when the airplane uses the other 2 autopilots for extra precision.
@crazytimtimtim for number 5, the autopilot doesn't need the FDs to be engaged. Flight Directors follow the autopilot and just display the pink bars on the horizon to indicate where the navigation wants you to go to.
@crazytimtimtim for number 5, the autopilot doesn't need the FDs to be engaged. Flight Directors follow the autopilot and just display the pink bars on the horizon to indicate where the navigation wants you to go to.
Really? I thought setting the MCP only set flight directors, and the AP just follows the flight directors lol.
Regardless of how it actually works, I guess this is different from the 737? I believe that requires flight directors.
@crazytimtimtim for number 5, the autopilot doesn't need the FDs to be engaged. Flight Directors follow the autopilot and just display the pink bars on the horizon to indicate where the navigation wants you to go to.
Really? I thought setting the MCP only set flight directors, and the AP just follows the flight directors lol.
Regardless of how it actually works, I guess this is different from the 737? I believe that requires flight directors.
The 737 doesn't require the FDs either, none of the modern Boeings autopilots require the FDs. And the AFDS (the info above the horizon) is used both when (one of) the FD(s) are on with the autopilot off and vice versa
Number 1. is fixed @mSparks43 would have the fix number for that.
You sure? I looked at recent commits but I didn't see the fix.
@MCCVeen got it.
For the rest I agree with all the other points, and that the autopilot is made more stable and reliable since it's really buggy atm.
The 737 doesn't require the FDs either, none of the modern Boeings autopilots require the FDs.
I still find this hard to believe... So Zibo is wrong?
The 737 doesn't require the FDs either, none of the modern Boeings autopilots require the FDs.
I still find this hard to believe... So Zibo is wrong?
It should work in the zibo, if not then it's wrong
Have you guys noticed this?
The T/D Label reappears...
The screenshot shows the plane in final approach...
Have you guys noticed this?
The T/D Label reappears...
The screenshot shows the plane in final approach...
Haven't seen that, but I noticed in the FMS that the End of Descent is blank... I think your approach might be messed up.
Edit: It seems like it might be ending the descent at FIO3L and starting another descent... @mSparks43 wanna take a look? I have also noticed we have no E/D marker.
Did another test: The T/D Label keeps coming back...
Shouldn't it only appear once?
Another issue: Would someone be so kind to do the following little test on his next flight?
Take off with VNAV and LNAV armed, then shortly after engaging the AP, switch over to HDG select.
It will always disconnect the AP for me. But only the very first time I engage HDG SEL...
@mSparks43 this is why we need to enable Github discussions.
While this is a good and useful conversation, it's kinda unrelated to the original post. A great place to put this would be in discussions. (I guess this could also be posted as an issue but 🤷)
I am trying to only include bugs in my list that are confirmed, and multiple people have experienced them.
Don't worry, this will be my last unrelated post here. I just put them here because it says "important" :D
The Distance to the Destination on the Progress Page is still not calculated correctly - even after erasing the missed approach from the LEGs page.
https://youtu.be/TjmPp91DwCI?t=235
Even on the final LEG it is adding 8nm.