[Flightgear-devel] Magnetic headings

[Wolfram W. <wo...@wa...>]

Hi,

One of the OpenRadar user reported a problem at KLAX. I have reproduced
it using FGFS 2.10, as I have no newer one...

I'm testing in a C 172 at KLAX, alligned with runway 07L (heading 71°)
Open Radar:
Runway Heading 071 degree
Magnetic variation: 12.4 deg (rounded for display to one decimal place,
same model as FGFS)

FGFS:
Internal properties: 
/orientation/heading-deg=82,9
/orientation/heading-magnetic-deg=70.6
/environment/magnetic-variation-deg=12.39

The internal properties match OpenRadar.

KOMPASS: Shows about 80 deg!!! => true heading
HUD shows about 83 deg!!! => true heading

As I understand it, the compass should show into FGFS' internal magnetic
heading. 

(At KOAK HUD shows true, compass magnetic heading... weird, weird)

I start FGFS and all I do is to change the airport via the menu: Ort -
Flughafenauswahl.

Can anyone explain this to me?

Thank you!
Wolfram