SU-25T HUD and HSI heading difference

[WH_Boomer]

~S~ all,

 

While working on our FAC training in the War Hawks, we've come across an odd issue with the SU-25T HSI and HUD heading indications. That is, they indicate different headings.

 

To verify this, I made a simple mission with each aircraft type starting on the ramp and simply taxied a circle as if doing a compass swing. All other Russian aircraft worked fine and indicated correctly. But the SU-25T HSI began rotating rapidly once I had completed only about 90 degrees of the turn. It settled out at almost 180 degrees off, then rotated back the opposite direction, finally settling out at approximately 120 degrees off as seen in the pictures below.

 

I do hope this can be fixed soon, as we had hoped to utilize the SU-25T in conjunction with the KA-50 Blackshark in FAC roles. Not being able to fly a bearing line accurately makes this near impossible.

[104th_Crunch]

For the Su-25T in FC1 you have to wait about 60 seconds after turning on electrics before starting engines so the HSI will align properly. In FC2 you have to wait about 5 seconds.

[WH_Boomer]

Ok resolved. It seems this has been a "feature" for some time.. :doh:

 

Search finally found this thread:

 

Su-25: Problem with INS alignment - wrong HSI heading

[Shaman]

Typical gyro drift... bigger when gyro is not @ full speed.

Normally you'd use knob next to HSI to adjust it by looking at your magnetic compass - but in ED's sim it is not available :o