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HSI-Bug in Vanilla Su-25


egaRim

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Good evening there!

 

When flying the Su-25 I often have the problem, that the compass in my HSI isn't indicating the correct heading.

 

For example when I lineup on Runway 22 it indicates heading 310.

 

It's hard to reproduce this issue but I have heared from fellow pilots that the same problems occurs with them. It's online as well as offline.

 

Course indicator seems to work correctly, though.

 

Do I have to pay attention to something particular when I start up the Frog? I usually just activate electric power and after the ADI has settled down, I run up the engines one by one.

 

Maybe someone can help or give hints...

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If I remember correctly, you must sit idle on the ramp for a certain amount of time to allow the gyros time to spin up. 3 minutes?

 

Yes. 3 minutes. Unfortunately it was not reflected in the manual.

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К чему стадам дары свободы?

Их должно резать или стричь.

Наследство их из рода в роды

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It is the same with Su-25T. You can get diffrent heading on HUD and HSI.

 

By pressing [1] (nav mode) after electrics came on and HSI heading is stabilized HSI becomes kinda locked to correct heading so I can begin to taxi without breaking the instrument. I don't think I wait 3 min.

 

 

Just remember to press [1] after the first time you turned avionics/electrics on

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So, let's see if I got it:

 

I have to wait those 3 minutes before or after start engines?

 

Before.

 

My procedure:

 

-Turn on power and lights

-Watch for the HSI to finish rotating

-Start engines

-Select enroute mode (first nav mode)

-Begin taxiing

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Oh, I always wondered why the navigation in Su-25T and 25 was so crap. The navigation cue doesn't stay on a correct line, instead it just rotates right or left in a time randomly I always thought this was a bug or something realistic :) Isn't it a bit late to announce that it's been modelled?

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