John,
Maybe it's just me but many times I'm confused about the speed end direction
of the wind. Which is very bad because it's pretty basic thing to know.
I don't have any problem to deviate 15 degrees of track for 10 seconds to
get a reliable wind calculation. In most circumstances it's totally worth
it.
Tibor
On Mon, May 23, 2011 at 17:07, John Wharington <jwharing...@gmail.com>wrote:
> I doubt very much that users want to fly a predefined accurate set of paths
> just to determine wind while they are on a cross-country flight.
>
>
>
> On Tue, May 24, 2011 at 12:17 AM, Roman Stoklasa <rst...@gmail.com> wrote:
>
>> Hi all,
>>
>> isn't it easier to implement (or merge) so called "TrueWind Calculation"
>> from LK8000?
>> If I understand the discussion correctly, TrueWind is doing pretty much
>> the same, what is Tibor suggesting...
>>
>> For those who do not know this feature, more information could be found in
>> the LK8000's manual (http://www.bware.it/LK8000/LK8000_MANUAL_122.pdf),
>> page 98, chapter "TrueWind Calculation v1".
>>
>> Tibor, please have a look at the LK8000 manual and compare it to your
>> ideas. Is it "the same"? Or what's the difference? If it differs, which
>> method would be better and why?
>>
>> Regards,
>>
>> Roman.
>>
>>
>>
>>
>>
>>
>> On Mon, 23 May 2011 15:27:41 +0200, Tibor Arpas <ti...@bidforfix.com>
>> wrote:
>>
>> > Just to clarify after John's question.
>> >
>> > The pilot needs to do zig zag for the zig zag calculation to work. And
>> to do
>> > zig zag flight path you inevitably have to make a turn.
>> >
>> > I'm still working with the assumption that there is no airspeed sensor,
>> or
>> > vario with airspeed data output in the glider.
>> >
>> > But the pilot flies constant, known airspeed for extended periods of
>> time so
>> > the airspeed sensor would indicate the same known value for these
>> extended
>> > periods of time.
>> > Except of course for the situations when the pilot is not maintaining
>> the
>> > speed.
>> > - circling
>> > - change of decision and a scrappy turn into a new direction
>> > - other distractions
>> >
>> > So ideally, the known speed is maintained most of the time and only
>> > interrupted by some maneuvers which are detectable from the GPS track
>> (with
>> > a little help of some user interaction).
>> >
>> > This style of flying and little user interaction should give XCSoar
>> enough
>> > data to get wind calculation as good as LX 7000 or similar.
>> >
>> > Tibor
>> >
>> >
>> > On Mon, May 23, 2011 at 13:16, John Wharington <jwharing...@gmail.com
>> >wrote:
>> >
>> >> Hi Tibor,
>> >>
>> >> Maybe you misunderstand, you don't need constant airspeed for the
>> zigzag
>> >> wind algorithm to work,
>> >> assuming you have a vario that outputs airspeed to XCSoar.
>> >>
>> >>
>> >> On Mon, May 23, 2011 at 9:15 PM, Tibor Arpas <ti...@bidforfix.com>
>> wrote:
>> >>
>> >>> Hmm, no idea, I look outside, not into instruments. when searching for
>> >>> lift or making ad hoc decisions during glide I wouldnt like to
>> concentrate
>> >>> on IAS or some steady turns. Maybe it would be most beneficial on
>> final
>> >>> glide...
>> >>> On May 23, 2011 12:07 PM, "John Wharington" <jwharing...@gmail.com>
>> >>> wrote:
>> >>> > You also need to be turning for zigzag wind to work; i wonder how
>> >>> accurately
>> >>> > you can fly to a given true airspeed while turning?
>> >>> >
>> >>> > On Mon, May 23, 2011 at 4:03 PM, Tibor Arpas <ti...@bidforfix.com>
>> >>> wrote:
>> >>> >
>> >>> >> Hi everybody,
>> >>> >>
>> >>> >> I just recently learned strong arguments for a very steady
>> >>> inter-thermal
>> >>> >> cruising speeds (ignoring the McReady speed to fly):
>> >>> >> http://www.betsybyars.com/guy/soaring_symposia/72price.html
>> >>> >>
>> >>> >> Sure, you should consult your gliders polar and the estimated climb
>> in
>> >>> >> front of you.
>> >>> >> But until you hit something clearly worth circling in, you can
>> maintain
>> >>> >> steady speed.
>> >>> >>
>> >>> >> I flew this way during my last competition and it really feels
>> better.
>> >>> And
>> >>> >> I think it also makes the airspeed sensor input unnecessary.
>> >>> >> For a given day I might decide I'll do 150 km/h glides.
>> >>> >>
>> >>> >> Feature request:
>> >>> >> I would like to set-up my typical gliding (air) speed in the "fligh
>> >>> >> set-up". Now whenever XCSoar would detect a steady (GPS) speed for
>> 20+
>> >>> >> seconds it would beep and I would be able to confirm with gesture
>> that
>> >>> I was
>> >>> >> flying my typical airspeed during those 20 seconds.
>> >>> >>
>> >>> >> This way, I imagine, we would have more reliable wind computations
>> even
>> >>> for
>> >>> >> those frequent cases when the wind changes and you don't circle.
>> >>> >>
>> >>> >> Tibor
>> >>> >>
>> >>> >>
>> >>> >>
>> >>>
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>>
>>
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> Read this article and learn how Intel has extended the reach of its
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Read this article and learn how Intel has extended the reach of its
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http://p.sf.net/sfu/intel-dev2devmay
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