Hmmm, the nav database had the actual radial alignment of the station
relative to true north and I remember sorting that out so that when you fly
off a chart, everything would be in chart-agreement when you flew to radial
intersection points. Bummer if that got broke along the way ... I haven't
checked it recently.
Curt.
On Sat, Mar 20, 2010 at 5:09 PM, David Megginson wrote:
> There's a bug in the /instrumentation/nav/radials/selected-deg
> property: the code mistakenly assumes that the selected radial is in
> true degrees, but isn't a bearing -- it's just a number. You could
> design a VOR where radial 180 was north of the VOR, if you wanted to
> (though usually it's close to a bearing in *magnetic* degrees). The
> bug affects the --nav1 and --nav2 option in particular, since
>
> --nav1=340:114.6
>
> will no longer start FlightGear with the Nav1 indicator dialed to the
> 340 radial, unless the local magnetic variation happens to be 0. At
> CYRO, for example, the actual radial ends up being closer to 326,
> which is counterintuitive. Nav radios and indicators know nothing
> about magnetic variation.
>
> We used to have this right in FlightGear, but it's gotten messed up
> over the last 3-4 years. I'd like to fix it, but I'm worried about
> how many places we've hardcoded this assumption. How hard will it be
> to correct this? How many of you have designed radios, autopilots,
> etc. counting on this bug?
>
>
> Thanks,
>
>
> David
>
>
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--
Curtis Olson: http://baron.flightgear.org/~curt/
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