yes.
totally agree.
-if it works-
claus
Am 23.05.2011 17:13, schrieb Tibor Arpas:
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
<mailto: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
<mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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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>>> >> What Every C/C++ and Fortran developer Should Know!
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>>> >>
>>>
>>
>>
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