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L-Nav Speed to fly Indications



 
 
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  #1  
Old April 28th 08, 12:21 AM posted to rec.aviation.soaring
Fred[_4_]
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Posts: 27
Default L-Nav Speed to fly Indications

I have an L-Nav connected to a Model 20 GPS and also a Winter
variometer. While at Marfa I had several oppotunities to fly some
long distances without having to thermal. What I noticed is that the
speed to fly commands are really off. The other variometers seem to
track each other and the averager and netto displays on the LNav seem
to jive. But, when flying straight, and flying through heavy sink,
the push to pull commands are showing me to slow down, just the
opposite of what is expected. The altitude needed to get home seems
to be correct, it was almost the same number as shown on the PDA with
GNII running.

Any ideas,
Fred
  #2  
Old May 15th 08, 01:19 PM posted to rec.aviation.soaring
lrbj
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Posts: 14
Default L-Nav Speed to fly Indications

On Apr 28, 1:21*am, Fred wrote:
I have an L-Nav connected to a Model 20 GPS and also a Winter
variometer. *While at Marfa I had several oppotunities to fly some
long distances without having to thermal. *What I noticed is that the
speed to fly commands are really off. *The other variometers seem to
track each other and the averager and netto displays on the LNav seem
to jive. *But, when flying straight, and flying through heavy sink,
the push to pull commands are showing me to slow down, just the
opposite of what is expected. *The altitude needed to get home seems
to be correct, it was almost the same number as shown on the PDA with
GNII running.

Any ideas,
Fred


Hi,
Can it be the battery in your L-Nav? I had a similar experince last
year - replacing the internal battery fixed the problem.
Remember to note down all settings in your LNav configure & Calibrate
screen.
/Lars
  #3  
Old May 15th 08, 03:55 PM posted to rec.aviation.soaring
Paul Remde
external usenet poster
 
Posts: 1,691
Default L-Nav Speed to fly Indications

Hi Fred,

My best guess is that you have an incorrect number entered into the polar
settings or other settings in the L-NAV. Please mark down the settings and
e-mail them to me so I can see if they make sense.

Paul Remde
Cumulus Soaring, Inc.
http://www.cumulus-soaring.com

"lrbj" wrote in message
...
On Apr 28, 1:21 am, Fred wrote:
I have an L-Nav connected to a Model 20 GPS and also a Winter
variometer. While at Marfa I had several oppotunities to fly some
long distances without having to thermal. What I noticed is that the
speed to fly commands are really off. The other variometers seem to
track each other and the averager and netto displays on the LNav seem
to jive. But, when flying straight, and flying through heavy sink,
the push to pull commands are showing me to slow down, just the
opposite of what is expected. The altitude needed to get home seems
to be correct, it was almost the same number as shown on the PDA with
GNII running.

Any ideas,
Fred


Hi,
Can it be the battery in your L-Nav? I had a similar experince last
year - replacing the internal battery fixed the problem.
Remember to note down all settings in your LNav configure & Calibrate
screen.
/Lars


 




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