Joacim Persson wrote:

> Compare the properties:
>     /instrumentation/heading-indicator/offset-deg
> and
>     /environment/magnetic-variation-deg[0]
> 
> The former is drifting (decreasing).

The gyro actually _does_ have a drift, on ground as well as in flight.
Especially in flight you have to re-adjust it from time to time which
requires level and steady flight, because otherwise the magnetic
compass doesn't show a valid heading,

Martin.
-- 
 Unix _IS_ user friendly - it's just selective about who its friends are !
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