I am using the external wind from my 302 and it is noticeable more accurate and
responsive than the internal 302 calculation. If you get wrong readings your
302 airspeed may need calibration. Also the temperature sensor needs to be
working correctly to be able to calculate TAS correctly.
Having said that, I wish the 302/XCSoar were capable to calculate wind changes
instantaneously when flying in straight lines. I believe most flight computers
can't since it requires compass data. When flying in convergence over mountain
terrains as we mostly do where I fly, wind direction keeps changing all the
time and it is crucial to know the direction especially when getting below the
ridges.
Ramy
On May 30, 2012, at 6:02 AM, "Horst Rupp" <ho...@rupp-family.de> wrote:
> Hello,
>
> when connecting my CAI302 via a home-made IOIO-box to my STREAK, I can see
> under Config 3/3 what data is transferred to XCSoar. This indication does NOT
> say that wind is transferred.
> Is there simply no more room to denote “wind” on the line (it is pretty full)
> ?
> Or is wind data really not transferred at all ?
>
> The reason behind my question is :
> I had a discussion with Turbo the other year saying that wind data visible on
> SeeYou was very accurate whereas wind data on XCSoar was not, with respective
> devices connected to CAI302. His remedy was : Have you configured XCSoar to
> obtain wind data from the CAI ?
> I made sure I had, but my wind data still seemed to be questionable. There
> was always a large difference between circling wind and diving wind, most of
> the time a factor 1.5 to 2 between the wind speeds, whereas direction did not
> differ much. On SeeYou wind was much more stable between circling and diving,
> also using wind data input from the CAI302. I have an itching that XCSoar
> does not at all get wind data from the CAI, and calculates its own wind
> instead.
>
> Now back to initial question : Does anybody have an idea, how I can find out
> what XCSoar actually does ?
>
> Cheers Horst
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