ATT and HÖJD are not working properly

[legitscoper]

Is it only for me but when I turn on ATT or HÖJD autopilot, my plane just dives nose down. I can trimm it but as soon as I engage it, it dives down

[Raven1606688358]

Did you set your reference altitude (map to a button)? I think that might be it, but not sure

[legitscoper]

Did you set your reference altitude (map to a button)? I think that might be it, but not sure

I did not, I will try but I don't think that it is my problem. I used ATT and HÖJD without that so this is not the problem; anyway, I will try

 

Wysłane z mojego SM-A500FU przy użyciu Tapatalka

[legitscoper]

I have reinstalled viggen and it still exists

 

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[QuiGon]

As Raven said: You have to set your reference altitude by pressing the respective button. If you don't do this the autopilot will use the reference altitude of the waypoint which is pretty low by default.

[The_Nephilim]

I am not having issues with either function It might be what the guys here stated you need to reset your reference alltitude..

[Pocket Sized]

The Höjd AP resets the reference altitude to current when it is engaged AFAIK. I've never had any issues turning it on while many km above the previous reference alt.

 

ATT should work fine as long as you're within the pitch and roll angle limits, regardless of altitude reference.

 

OP, make sure you're below 0.9 Mach just so we can be sure it's not Mach tuck causing the issue. (Although ATT should easily be able to keep you level whilst passing through Mach 1)

[legitscoper]

No no no no no......

No matter I do (trim to make plane fly straight, fly low, high, slow, fast, inverse, set reference altitude) aircraft dives down and hits ground. Also, BANA/GRANS gives nothing, I cannot turn off ecm when it is turned on, countermeasure things not work, chaff and flare always dispense in same way.

I reinstalled DCS and today I will see if it fixed

 

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[Pocket Sized]

Are you absolutely certain you're not just experiencing Mach tuck? The viggen will go supersonic in a real hurry if you leave the burner on, which creates massive trim changes.

[Home Fries]

I have experienced this as well on occasion, though it is not consistent enough that I can duplicate it. It appears that the "reference altitude" is lower than what the current altitude is, and using the reference button doesn't do anything to change it.

 

Like I said, this doesn't happen enough to duplicate the problem (I've only experienced it once, and it was not Mach tuck), and it could even be due to an avionics setting I wasn't aware of, but it is something that needs to be addressed either in the code or in the manual.

[legitscoper]

I reinstalled DCS. I will try today and it should be fixed

 

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