Autopilot not holding altitude.

[Shiroka]

16 hours ago, Ignition said:

Turn on the AP and THEN turn on the alt hold. I'm not sure it should work like that (I don't think so) but it works

 

Is that not what I’m doing in the track? I’m pretty sure I’ve tried it every which way and I just can’t get anything working. Same with Alt Select.

i posted on the Discord and got nothing useful back, it seems like it works for some people but I don’t know what the difference is. Only thing I can think of is single-thread vs multi-thread (I use multi) but that’s a total guess.

[GregP]

I can get the AP alt hold to work, but not alt select; I've tried as many combinations and orders of options as I can think of and nothing will force the plane to climb or descent to my selected altitude.  Hopefully AP functionality is still WIP?

[LazyBoot]

30 minutes ago, GregP said:

I can get the AP alt hold to work, but not alt select; I've tried as many combinations and orders of options as I can think of and nothing will force the plane to climb or descent to my selected altitude.  Hopefully AP functionality is still WIP?

Are you adding/removing power after selecting your desired altitude?

[GregP]

10 hours ago, LazyBoot said:

Are you adding/removing power after selecting your desired altitude?

Possibly not! I just came across that suggestion in Casmo's video about the AP too, and I don't recall whether I changed power, but I'll try that next flight. 

[Holbeach]

On 1/30/2024 at 2:22 PM, GregP said:

Possibly not! I just came across that suggestion in Casmo's video about the AP too, and I don't recall whether I changed power, but I'll try that next flight. 

It works OK with power changes, but stay below M 0.97 or it will drop out. (M 0.97 bug now squashed).

The guide speed is on the UFC for descent.

It's a funny system and is not exactly the same as the real manual states.

I tend to use Att hold and Alt hold as I find it more useful.

..

Edited February 24 by Holbeach

[VDV]

Autopilot of SE deffinetelly doesnt works well. When im pressinge whatever AP mode, my F-15 just keeps nose up and AP indicates that its ON, but does absolutelly nothing ...

Edited February 3, 2024 by VDV

[razo+r]

On 2/4/2024 at 12:27 AM, VDV said:

Autopilot of SE deffinetelly doesnt works well. When im pressinge whatever AP mode, my F-15 just keeps nose up and AP indicates that its ON, but does absolutelly nothing ...

 

Just selecting the AP modes doesn't automatically engage the autopilot.

[VDV]

ok so how  do i engage

[razo+r]

5 minutes ago, VDV said:

ok so how  do i engage

Press the "AP" button on the UFCP. You can also verify that the autopilot is engaged by looking at the AP announciator light to the right of the right MFD.

Edited February 5, 2024 by razo+r

[Holbeach]

AP,(A), engages Autopilot Attitude Hold. Then press Altitude Hold or Altitude Select, (below 0,97M). (M 0.97 bug now squashed)

They work perfectly.

Make sure you are trimmed to 1G.

..

Edited February 24 by Holbeach

[Ladan]

I am having the same problem. What do I do? Has anyone found the correct procedure for this?

[Amarok_73]

@Ladan You have to trim the aircraft precisely to 1G to make him fly more or less horizontaly, but currently it seems to be impossible to trim it so Your vertical velocity will be zero.

 

[dporter22]

It hasn't ever worked consistently, and it will never be fixed now that this module is no longer supported.

[felixx75]

Interestingly, I don't really have any problems maintaining altitude with the autopilot...  I also don't trim much beforehand.

 

4 minutes ago, dporter22 said:

and it will never be fixed now that this module is no longer supported

...and that remains to be seen, as nothing is certain (neither in one direction nor the other). But that's a topic for another thread.

[Ladan]

1 hour ago, Amarok_73 said:

@Ladan You have to trim the aircraft precisely to 1G to make him fly more or less horizontaly, but currently it seems to be impossible to trim it so Your vertical velocity will be zero.

 

So, what to do if it's impossible?

[felixx75]

4 hours ago, Ladan said:

So, what to do if it's impossible?

It's not impossible. On the contrary, it works (for me) without any problems and is very easy to use.

[Holbeach]

14 hours ago, Ladan said:

So, what to do if it's impossible?

 

AP,(A), engages Autopilot Attitude Hold. Then press Altitude Hold.

They work perfectly. Tested this morning.

Make sure you are trimmed to 1G.

Make sure stick is calibrated.

..

[Ladan]

5 hours ago, Holbeach said:

 

AP,(A), engages Autopilot Attitude Hold. Then press Altitude Hold.

They work perfectly. Tested this morning.

Make sure you are trimmed to 1G.

Make sure stick is calibrated.

..

How to trim to 1G?

[razo+r]

4 hours ago, Ladan said:

How to trim to 1G?

Easiest way: fly level and trim until plane does neither ascend and descent.

[draconus]

15 hours ago, Ladan said:

How to trim to 1G?

Use trim up/down until the nose stays put, no pitch rate, HUD G meter reads 1.0.

You can check the process to turn on AP ALT on page 248 of Manual.