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MSFS Autopilot pitch control

Messages
506
Country
france
Hello,

This problem is not new, I also had it with fs9/FSX and could find a workaround, but not this time.
I would like to control a pitch with the autopilot. For example, imagine I would like the autopilot to maintain a 3° nose up attitude. Is this possible?

I tried to use AP_ATT_HOLD and also AP_PITCH_LEVELER with AP_PITCH_REF_SET but nothing worked...
Any help is greatly welcome.

Thanks,
Eric
 

DragonflightDesign

Resource contributor
Messages
924
Country
northernireland
Hi Eric

I guess you've tried this?

If (pitch is correct)
{
KEY_AP_ATT_HOLD_ON
KEY_AP_WING_LEVELER_OFF
}


-Dai
 
Messages
506
Country
france
I did this, without turning wing leveler off. It didn't have any effect...
During my test, the autopilot was used to maintain heading and nothing was used for the pitch control. Using AP_ATT_HOLD_ON didn't have any effect, while I was expecting that A/P maintains the attitude.
Maybe I missed something, but I don't know what.
 

tgibson

Resource contributor
Messages
10,716
Country
us-california
You used code like this?

XML:
(>K:AP_ATT_HOLD_ON) (>K:AP_WING_LEVELER_OFF)

or

XML:
(>K:AP_ATT_HOLD_ON) (>K:AP_WING_LEVELER_OFF)
 
Messages
506
Country
france
I don't code in XML, I use Javascript, so my code was:
Code:
SimVar.SetSimVarValue("K:AP_AT_HOLD_ON", "bool", 1);
I didn't switch off the wing leveler.
I will try this.

I also tried to use the pitch mode, hoping I could set it to a certain value:
Code:
SimVar.SetSimVarValue("K:AP_PITCH_REF_SET", "degrees", -2.0);
SimVar.SetSimVarValue("K:AP_PITCH_LEVELER_ON", "Bool", 1);
It didn't work any better, maybe I used it the wrong way...
 
Messages
506
Country
france
I have tested, and by switching wing leveler off, it works !!
Here is my code, as suggested by you:
Code:
SimVar.SetSimVarValue("K:AP_ATT_HOLD_ON", "Bool", 1);
SimVar.SetSimVarValue("K:AP_WING_LEVELER_OFF", "Bool", 1);
The current pitch attitude is maintained, perfect :)
 

DragonflightDesign

Resource contributor
Messages
924
Country
northernireland
Yeah - that's what I was trying to say above. I put the code into a function called pitchHold()
Code:
void pitchHold(boolean hold)
{
  if(hold == true)
  {
    trigger_key_event(KEY_AP_ATT_HOLD_ON, 0);
    trigger_key_event(KEY_AP_WING_LEVELER_OFF);
  }
  else
  {
    trigger_key_event(KEY_AP_ATT_HOLD_OFF, 0);
  }
  return;
}
Note that I don't turn the wing leveller back on because I find it to be a complete nuisance. Perhaps you could do something similar in JavaScript which would save you having to think about it in the future?
 
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