Oudie wiring to SN10

Follow-up: yesterday I did my first x/c with the Oudie/SYM + SN10. (An
AST!!!)

SeeYou Mobile is *much* happier with the air data from the SN10. The
combination worked great. I would go so far as to say that SYM's
thermal assistant is next to useless without the air data (which I
would expect), while very effective with.

tuN7o

On Apr 4, 7:25*am, Tuno wrote:
Follow-up: yesterday I did my first x/c with the Oudie/SYM + SN10. (An
AST!!!)

SeeYou Mobile is *much* happier with the air data from the SN10. The
combination worked great. I would go so far as to say that SYM's
thermal assistant is next to useless without the air data (which I
would expect), while very effective with.

tuN7o

But is it the airdata that made it better or the external GPS position
source?

The HP310 internal GPS makes the LK8000 thermal assistant useless but
it may well work better with an external GPS. It seems to work quite
quite well in replay mode using 2 second flight logs from the 302.
Also with internal GPS the 310/LK8000 circling wind estimates are
sometimes hazardously misleading.

I don't know anything about the charactersitics of the Oudie internal
GPS but I doubt it was optimized for aviation. Was it?

Andy

Good question wrt the GPS quality. How is a receiver optimized for
aviation?

But I do think the air data makes a huge difference in wind and glide
calculations. Without it, SYM and the SN10 provided varying answers on
the steering to target; with the airdata, they always matched.

On Apr 4, 10:21*am, Tuno wrote:
Good question wrt the GPS quality. How is a receiver optimized for
aviation?

But I do think the air data makes a huge difference in wind and glide
calculations. Without it, SYM and the SN10 provided varying answers on
the steering to target; with the airdata, they always matched.

I'd be convinced if you disabled the SN10 GPS feed and saw the same
results. Or are you saying the SN-10 is feeding only airdata to the
Oudie and not GPS position data.

PNA GPS receivers are typically optimized for car navigation. One
result is that they like to say they are going straight even if the
host vehicle is turning. Ok it's not the GPS receiver itself but the
associated data processing and in some devices, such as the HP310, no
one has yet found a way to hack it so it works properly.

Andy

On Apr 4, 10:37*am, Andy wrote:
On Apr 4, 10:21*am, Tuno wrote:

Good question wrt the GPS quality. How is a receiver optimized for
aviation?

But I do think the air data makes a huge difference in wind and glide
calculations. Without it, SYM and the SN10 provided varying answers on
the steering to target; with the airdata, they always matched.

I'd be convinced if you disabled the SN10 GPS feed and saw the same
results. Or are you saying the SN-10 is feeding only airdata to the
Oudie and not GPS position data.

PNA GPS receivers are typically optimized for car navigation. *One
result is that they like to say they are going straight even if the
host vehicle is turning. *Ok it's not the GPS receiver itself but the
associated data processing and in some devices, such as the HP310, no
one has yet found a way to hack it so it works properly.

Andy

Andy,
do I read you correctly that you are assuming that the Oudie suffers
from the same issue as the HP310? It seem possible that the Oudie was
hacked in such a way as to prevent that, or didn't have the problem in
the first place. It would be interesting to know about that.

I've got two flights on a MiniMap and the wind information is a lot
more believable that what the HP310 was giving me.

Brian

On Apr 4, 10:37*am, Andy wrote:
On Apr 4, 10:21*am, Tuno wrote:

Good question wrt the GPS quality. How is a receiver optimized for
aviation?

But I do think the air data makes a huge difference in wind and glide
calculations. Without it, SYM and the SN10 provided varying answers on
the steering to target; with the airdata, they always matched.

I'd be convinced if you disabled the SN10 GPS feed and saw the same
results. Or are you saying the SN-10 is feeding only airdata to the
Oudie and not GPS position data.

PNA GPS receivers are typically optimized for car navigation. *One
result is that they like to say they are going straight even if the
host vehicle is turning. *Ok it's not the GPS receiver itself but the
associated data processing and in some devices, such as the HP310, no
one has yet found a way to hack it so it works properly.

Andy

Andy,

I've been told, and I hope it's correct, that sending a GPS signal to
the 310 will give better results. I will be using a Powerflarm to send
the 310 data and by-pass the internal GPS. It is a simple setting in
the LK8000 software for a com port and baud rate setting.

Brad

@Andy: I saw a large difference before and after connecting the SN10,
that's good enough for me.

One of the things I checked after connecting the SN10 was the data
stream using SYM's terminal feature. Observed all the normal NMEA
sentences plus the SN10's $PILC sentences.

Andres will have to answer to whether/how the Oudie's GPS is optimized
for aviation, it's immaterial at this point.