SN-10 wind problem

[Gary Boggs]

My Ilec normaly does a great job calculating the wind while ridge
soaring here in Hood River, Oregon, but for the last few flights it
has not been giving me the correct wind, even with lots of circling.
It was off about 45 degrees all day yesterday. I rebooted it before
the flight but that didn't seem to help. Has any one else seen this
problem and have a fix or am I going to have to send it in again?

Gary Boggs

[Ole John Aske]

GARY BOGGS wrote:
> My Ilec normaly does a great job calculating the wind while ridge
> soaring here in Hood River, Oregon, but for the last few flights it
> has not been giving me the correct wind, even with lots of circling.
> It was off about 45 degrees all day yesterday. I rebooted it before
> the flight but that didn't seem to help. Has any one else seen this
> problem and have a fix or am I going to have to send it in again?
>
> Gary Boggs

Have you checked / calibrated the SN10's IAS ?

[Paul Remde]

Hi Gary,

This is a long shot, but are you sure that the winds weren't simply
different at altitude than on the ground? A 45 degree difference is
probably not that uncommon.

Good Soaring,

Paul Remde

"Ole John Aske" > wrote in message
...
> GARY BOGGS wrote:
>> My Ilec normaly does a great job calculating the wind while ridge
>> soaring here in Hood River, Oregon, but for the last few flights it
>> has not been giving me the correct wind, even with lots of circling.
>> It was off about 45 degrees all day yesterday. I rebooted it before
>> the flight but that didn't seem to help. Has any one else seen this
>> problem and have a fix or am I going to have to send it in again?
>>
>> Gary Boggs
>
> Have you checked / calibrated the SN10's IAS ?
>
>

[Dave Nadler]

On Mar 31, 5:50*am, Ole John Aske > wrote:
> GARY BOGGS wrote:
> > My Ilec normaly does a great job calculating the wind while ridge
> > soaring here in Hood River, Oregon, but for the last few flights it
> > has not been giving me the correct wind, even with lots of circling.
> > It was off about 45 degrees all day yesterday. I rebooted it before
> > the flight but that didn't seem to help. Has any one else seen this
> > problem and have a fix or am I going to have to send it in again?
>
> > Gary Boggs
>
> Have you checked / calibrated the SN10's IAS ?

Per the (separate) email reply to Gary's email:

Hi Gary - Wind is calculated using:
- ASI (ignore small offsets at rest, should track accurately over 35
knots)
- external temperature (must be OAT, not somewhere-inside-cockpit
temp)
- GPS track information (GPS must be received OK by SN10)
If you're getting lousy winds and the actual wind is over ~8 knots,
one of these is ALWAYS screwed up (can be either an installation or
instrument problem).

The altitude screwup mentioned in your email indicates you could have
a static problem (something as simple as water in the static line or a
static leak could cause altitude and ASI errors, leading to wind
errors).

Do a CAREFUL check !
Let us know what you find !
Best Regards, Dave

At 08:44 PM 3/30/2009, Gary Boggs wrote:
Hi Dave
My ilec is acting up again. When I start it, it comes up with the
correct info for my home airport, and I hit enter but later in the
flight the altitude was low by several thousand feet. The calculated
wind speed and direction was also off all day by about 45 degrees
and
was high by 10-15mph. It's been doing this for several flights now
so
I tried rebooting it before yesterdays flight but it didn't seem to
help. Do I need to send it in again?

Gary Boggs

[Gary Boggs]

Here's an update on my SN-10 plumbing. I had a little water in my TE
tube. After blowing that out, I did a leak test on the TE and pitot
plumbing. The pitot was air tight but I did find a leak in the TE
system. The temp probe looks good. I will fly today and report back.


as Mar 30, 11:35*am, GARY BOGGS > wrote:
> My Ilec normaly does a great job calculating the wind while ridge
> soaring here in Hood River, Oregon, but for the last few flights it
> has not been giving me the correct wind, even with lots of circling.
> It was off about 45 degrees all day yesterday. I rebooted it before
> the flight but that didn't seem to help. Has any one else seen this
> problem and have a fix or am I going to have to send it in again?
>
> Gary Boggs

sd

[Barny]

Gary,
How did your TE Leak fix work out? I have a no-wind problem with my
SN10.
~Barny

[Gary Boggs]

Sorry I didn't get back. It's still screwed up, I am going to have to
send it to Germany.



On Apr 20, 4:37*pm, Barny > wrote:
> Gary,
> * How did your TE Leak fix work out? I have a no-wind problem with my
> SN10.
> ~Barny