SU-25T Autopilot wants to kill me

[nsu121]

When I turn the autopilot on it drives me to my own death. Basically it makes a left or right turn and lowers the altitude and I crash into the ground. (This already happened 2 times in a row : D)

What am I doing wrong? It just worked perfectly yesterday. (Maybe I forget to turn on/off something?)

[SSerponi76]

Try to apologize to it :P
Dunno, looks like a bug.

[Troll Norris]

Which autopilot mode exactly?

[nsu121]

Originally posted by Troll Norris:

Which autopilot mode exactly?

Well, all does the same. Here is how I do it= I press "A" then I turn on "Altitude Hold".
: D I think I'm doing something wrong.

[Troll Norris]

Originally posted by nsu121:

Originally posted by Troll Norris:

Which autopilot mode exactly?

Well, all does the same. Here is how I do it= I press "A" then I turn on "Altitude Hold".
: D I think I'm doing something wrong.

Try to uncheck the force feedback option in the mics options menu.

[nsu121]

Originally posted by Troll Norris:

Originally posted by nsu121:

Well, all does the same. Here is how I do it= I press "A" then I turn on "Altitude Hold".
: D I think I'm doing something wrong.

Try to uncheck the force feedback option in the mics options menu.

Thank you I will try it out !

If you dont mind it can I have an another question :D ? =
The mini TV in the SU-25T (Sorry I don't know how it is called)--> If I have a joystick, what button should I bind that? (On the 4 way hat?) I see youtubers move it soo smoothly and I have no idea how they do it. (Or they bind it on the joystick axis? Or they have 2 joysticks?)

[Troll Norris]

TDC. There is also axis for it if you want.

[nsu121]

Originally posted by Troll Norris:

TDC. There is also axis for it if you want.

Thank you !

[stevie02]

There’s about 5 or 6 Autopilot modes. Just use/map Attitude hold and Altitude hold, forget about the rest initially. Don’t touch the joystick when autopilot is engaged

[nsu121]

Originally posted by stevie02:

There’s about 5 or 6 Autopilot modes. Just use/map Attitude hold and Altitude hold, forget about the rest initially. Don’t touch the joystick when autopilot is engaged

Thank you! So only use the "Altitude hold", got it.

"Don’t touch the joystick when autopilot is engaged" I dont touch it unless I have to do small adjustments. I'm playing with an xbox one controller (no i dont have an xbox) haha : D I will get a real joystick soon. Is it easier with a joystick comparing to an xbox controller?

Have a good day ! :D

[van Leeuwenhoek's mustache]

I seem to remember that the Su-25T autopilot will turn off if you exceed a pretty narrow pitch / roll limit, making it a pita to use (I might be confusing it with the Mi-8's autopilot, though, since I haven't flown it in a while).

What I know for certain is that the Su-25T has a tendency to nose down strongly when approaching transonic speeds (mach 0.7+).
The problem is that it has the opposite tendency when flying at subsonic speeds (below mach 0.7), so it requires constant pitch and elevator trim adjustments, as your speed changes.

Perhaps it's because of this reason that the autopilot doesn't seem to work... might not be "strong" enough to keep the plane from pitching up and down.

One thing to keep in mind is that these pitching tendencies aren't as pronounced when you run the engines at lower revolutions (80-90%)

[stevie02]

As an attack aircraft, ATTITUDE hold is handier than ALTITUDE hold with regards to Autopilot. Yes get a joystick, it will be a game changer for you.

[nsu121]

Originally posted by stevie02:

As an attack aircraft, ATTITUDE hold is handier than ALTITUDE hold with regards to Autopilot. Yes get a joystick, it will be a game changer for you.

Thank you! I thought that "ATTITUDE" and "ALTITUDE" hold is the same : D

I think it works now, thank you! Have a good day

[nsu121]

Originally posted by Soup Chewer:

I seem to remember that the Su-25T autopilot will turn off if you exceed a pretty narrow pitch / roll limit, making it a pita to use (I might be confusing it with the Mi-8's autopilot, though, since I haven't flown it in a while).

What I know for certain is that the Su-25T has a tendency to nose down strongly when approaching transonic speeds (mach 0.7+).
The problem is that it has the opposite tendency when flying at subsonic speeds (below mach 0.7), so it requires constant pitch and elevator trim adjustments, as your speed changes.

Perhaps it's because of this reason that the autopilot doesn't seem to work... might not be "strong" enough to keep the plane from pitching up and down.

One thing to keep in mind is that these pitching tendencies aren't as pronounced when you run the engines at lower revolutions (80-90%)

Thank you!

"What I know for certain is that the Su-25T has a tendency to nose down strongly when approaching transonic speeds (mach 0.7+).
The problem is that it has the opposite tendency when flying at subsonic speeds (below mach 0.7), so it requires constant pitch and elevator trim adjustments, as your speed changes." -->So thats why the autopilot (when it worked correctly) kept pushing the nose down. (Its one of the 2 mistakes I made, the other is answered by "stevie02")

Have a good day and thank you :D

[Troll Norris]

SU-25T does not have supersonic wing profile. So once you at trans-sonic speed, the aircraft loses lift caused by compessibility. Also when you have any payload, the maximum TAS is around 100kph lower than with clean wings.