SeeYou Mobile achieved L/D question

[[email protected]]

Two of the most useful features to me in SeeYou Mobile, (or any other
soaring software) is the ability to display the L/D to any point, and
more importantly, your actual, achieved L/D over the ground in real
time. If you are flying to maximize your L/D over the ground, the
advantage is that for any combination of wind component or lift/sink,
you can change your speed and see the result without resorting to
calculations, rules of thumb, etc. The downside is that if the
software calculates the achieved L/D instantly, then every bump or dip
will result in a wildly varying readout. The L/D achieved must be
damped and averaged over some period of time to be useful. If this is
too long, then changes in speed will take too long to display a
corresponding change in the current L/D making it less useful to fine
tune your speed into, say, a debilitating headwind. SeeYou Mobile
appears to either have a pretty long average with a slow response, or
my old Phoebus has the world’s flattest polar. Does anyone know over
what period of time the achieved L/D is averaged in SeeYou Mobile, or
know of any way to adjust it? I can’t find anything about it on
their site and wondered if anyone knows before I contact them. If I
am fundamentally wrong about any of the above, please feel free to
straighten me out. I just want to learn, not argue.

Thanks… Don

[Tom Nau]

On Mar 30, 12:01*pm, wrote:
> Two of the most useful features to me in SeeYou Mobile, (or any other
> soaring software) is the ability to display the L/D to any point, and
> more importantly, your actual, achieved L/D over the ground in real
> time. *If you are flying to maximize your L/D over the ground, the
> advantage is that for any combination of wind component or lift/sink,
> you can change your speed and see the result without resorting to
> calculations, rules of thumb, etc. *The downside is that if the
> software calculates the achieved L/D instantly, then every bump or dip
> will result in a wildly varying readout. *The L/D achieved must be
> damped and averaged over some period of time to be useful. *If this is
> too long, then changes in speed will take too long to display a
> corresponding change in the current L/D making it less useful to fine
> tune your speed into, say, a debilitating headwind. *SeeYou Mobile
> appears to either have a pretty long average with a slow response, or
> my old Phoebus has the world’s flattest polar. *Does anyone know over
> what period of time the achieved L/D is averaged in SeeYou Mobile, or
> know of any way to adjust it? * I can’t find anything about it on
> their site and wondered if anyone knows before I contact them. *If I
> am fundamentally wrong about any of the above, please feel free to
> straighten me out. *I just want to learn, not argue.
>
> Thanks… Don

If I recall correctly, I remember reading somewhere that it is a 2
minute average.

Tom

[[email protected]]

On 30 mar., 20:26, Tom Nau > wrote:
> On Mar 30, 12:01*pm, wrote:
>
>
>
> > Two of the most useful features to me in SeeYou Mobile, (or any other
> > soaring software) is the ability to display the L/D to any point, and
> > more importantly, your actual, achieved L/D over the ground in real
> > time. *If you are flying to maximize your L/D over the ground, the
> > advantage is that for any combination of wind component or lift/sink,
> > you can change your speed and see the result without resorting to
> > calculations, rules of thumb, etc. *The downside is that if the
> > software calculates the achieved L/D instantly, then every bump or dip
> > will result in a wildly varying readout. *The L/D achieved must be
> > damped and averaged over some period of time to be useful. *If this is
> > too long, then changes in speed will take too long to display a
> > corresponding change in the current L/D making it less useful to fine
> > tune your speed into, say, a debilitating headwind. *SeeYou Mobile
> > appears to either have a pretty long average with a slow response, or
> > my old Phoebus has the world’s flattest polar. *Does anyone know over
> > what period of time the achieved L/D is averaged in SeeYou Mobile, or
> > know of any way to adjust it? * I can’t find anything about it on
> > their site and wondered if anyone knows before I contact them. *If I
> > am fundamentally wrong about any of the above, please feel free to
> > straighten me out. *I just want to learn, not argue.
>
> > Thanks… Don
>
> If I recall correctly, I remember reading somewhere that it is a 2
> minute average.
>
> Tom

2 minutes it is. We first thought we would make it an option but after
a few flights it became apparent that 2 minutes is the perfect
compromise.

Cheers,
Andrej Kolar
--
glider pilots use
http://www.SeeYou.si

[Nick Kennedy]

At 20:47 30 March 2009, wrote:
>On 30 mar., 20:26, Tom Nau wrote:
>> On Mar 30, 12:01=A0pm, wrote:
>>
>>
>>
>> > Two of the most useful features to me in SeeYou Mobile, (or any
other
>> > soaring software) is the ability to display the L/D to any point,
and
>> > more importantly, your actual, achieved L/D over the ground in real
>> > time. =A0If you are flying to maximize your L/D over the ground, the
>> > advantage is that for any combination of wind component or
lift/sink,
>> > you can change your speed and see the result without resorting to
>> > calculations, rules of thumb, etc. =A0The downside is that if the
>> > software calculates the achieved L/D instantly, then every bump or
dip
>> > will result in a wildly varying readout. =A0The L/D achieved must be
>> > damped and averaged over some period of time to be useful. =A0If
this
>i=
>s
>> > too long, then changes in speed will take too long to display a
>> > corresponding change in the current L/D making it less useful to
fine
>> > tune your speed into, say, a debilitating headwind. =A0SeeYou Mobile
>> > appears to either have a pretty long average with a slow response,
or
>> > my old Phoebus has the world=92s flattest polar. =A0Does anyone know
>ov=
>er
>> > what period of time the achieved L/D is averaged in SeeYou Mobile,
or
>> > know of any way to adjust it? =A0 I can=92t find anything about it
on
>> > their site and wondered if anyone knows before I contact them. =A0If
I
>> > am fundamentally wrong about any of the above, please feel free to
>> > straighten me out. =A0I just want to learn, not argue.
>>
>> > Thanks=85 Don
>>
>> If I recall correctly, I remember reading somewhere that it is a 2
>> minute average.
>>
>> Tom
>
>2 minutes it is. We first thought we would make it an option but after
>a few flights it became apparent that 2 minutes is the perfect
>compromise.
>
>Cheers,
>Andrej Kolar
>--
>glider pilots use
>http://www.SeeYou.si
>IMHO Soaring software that really works is such a incredibly powerful
copilot to have in the cockpit. I started with a "whiz wheel" and a
hand held Garmin 12 and while I got out there and had a ball, having a top
notch flight computor on board takes about 80% of the stress out of soaring
for me.
I fly with a CAI 302, a associated 303 display and a ipaq with Seeyou
mobile. It is a fair chunk of change for that system, but my goal is to
fly as far as I can most days, so to me the cost of a real system is well
worth it.
I highly encourage pilots who like to fly but still have varios from the
70's and 80's to upgrade learn the software and use. You can set it and
never touch it for the whole flight or button push to your hearts content.
I have used several soaring software program and I use seeyou because of
the product support from the designer Anderj Kolar.
he is readily available and happy to respond as he did above.

Seeyou isn't dirt cheap but the best never is!

What really cracks me up is when I see these 50k+ sailplanes with 3 or 4
varios installed none of which really work!

Seeyou at cloudbase!
Nick Kennedy
ASW 20 XS
Twin Astir TF