HSI.Compass LUA problem (bug?)

[dodger42]

I have my Mig29 flying along at 254 degrees on the compass. My LUA export which is exporting each frame to ensure its current data:

 

local HSI = LoGetControlPanel_HSI()

 

io.write(string.format("ALT = %.0f, IAS = %.0f, ADF = %.0f RMI = %.0f, Compass = %.0f\n", altBar, IAS, 57.3*HSI.ADF, 57.3*HSI.RMI, 57.3*HSI.Compass))

 

The compass value is coming back as: 106.5

 

Anybody shed some light on this?

[dodger42]

Hmm 106.5 + 253.5 = 360... a back bearing possibly..

[G3]

Hmm 106.5 + 253.5 = 360... a back bearing possibly..

 

Dodger42, if this is totally useless please disreguard.

transposed it reads 106.5 - 360 = -253.5

 

if thats the bearing info you desire, is it possible to make it subtract 360 in the equation th get your answer.

[dodger42]

Actually strangely enough it turns out that the following is true:

 

HDG=360-(57.3*HSI.Compass)

 

I also found anomolies with the LUA exports for IAS. For example when travelling at 970kmh IAS (mig29 HUD), my LUA export said I was doing 271knots. When doing 800 on the HUD, LUA said 224knots.

 

Fortunately the difference is a constant division, so I got it working, but its still very very strange. I cant figure out whether if in my current tired state I am missing something blatantly obvious.