Today's Message Index:
----------------------
1. 10:35 AM - Re: RV7-List Digest: 1 Msgs - 12/29/11 (Scott Randolph)
2. 10:35 AM - Re: RV7-List Digest: 1 Msgs - 12/29/11 (Scott Randolph)
3. 11:10 AM - Re: Re: Dynon Skyview Airspeed Calibration... (M. Marcotte)
Message 1
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| Subject: | RE: RV7-List Digest: 1 Msgs - 12/29/11 |
Because of normal "randomness" in density distributions in the atmosphere,
differences between GPS and pressure altitude are expected. "Correcting"
them away is likely to make your altimeter wrong at the surface (where it
really matters) and not match other aircraft you may be flying among.
That said, 100 feet is well within the error allowed for a calibrated
pitot-static system anyway.
As for your numbers, all I ended up seeing in your email was "Emacs!", so
I'm guessing that there was a graphic that didn't make it through the digest
version of the mailing list. :)
-----Original Message-----
From: owner-rv7-list-server@matronics.com
[mailto:owner-rv7-list-server@matronics.com] On Behalf Of RV7-List Digest
Server
Sent: Friday, December 30, 2011 12:01 AM
Subject: RV7-List Digest: 1 Msgs - 12/29/11
*
=================================================
Online Versions of Today's List Digest Archive
=================================================
Today's complete RV7-List Digest can also be found in either of the two Web
Links listed below. The .html file includes the Digest formatted in HTML
for viewing with a web browser and features Hyperlinked Indexes and Message
Navigation. The .txt file includes the plain ASCII version of the RV7-List
Digest and can be viewed with a generic text editor such as Notepad or with
a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter
11-12-29&Archive=RV7
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter
2011-12-29&Archive=RV7
===============================================
EMail Version of Today's List Digest Archive
===============================================
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RV7-List Digest Archive
---
Total Messages Posted Thu 12/29/11: 1
----------------------------------------------------------
Today's Message Index:
----------------------
1. 07:37 PM - Re: Dynon Skyview Airspeed Calibration... (Matt Dralle)
________________________________ Message 1
_____________________________________
Time: 07:37:26 PM PST US
From: Matt Dralle <dralle@matronics.com>
Subject: RV7-List: Re: Dynon Skyview Airspeed Calibration...
At 07:39 PM 12/26/2011 Monday, you wrote:
>--> RV-List message posted by: Matt Dralle <dralle@matronics.com>
>
>Dear Listers,
>
>I've been flying the new 10" Dynon Skyview in the RV-6 for a few weeks
>now and
it seems like the airspeed is reading maybe 10mph fast. The GS always reads
10mph or more slower than the True airspeed, no matter which way I fly with
respect to the current wind. Looking through the configuration options on
the Skyview, I'm not seeing parameters to calibrate the airspeed. If the
airspeed were *slow* compared to the GS, I could envision making adjustments
to the Pitot tube to get it in better alignment with slipstream. But *fast*
is a head scratcher.
If there's no electronic configuration parameters to adjust, what do you do?
Are there Pitot line "attenuators" like for RF in coax? ;-)
>
>Matt
Listers,
I went flying tonight in the RV-6 around sunset and took some airspeed
numbers flying the four points of the compass. I let each direction
normalize for about
2 minutes before taking the readings. I've still got my little black-tape
washer deals on the static ports that I detailed in a previous email.
Do these numbers make any sense?
Emacs!
I set the altimeter to 30.15 (KLVK ATIS). I compared the Dynon altitude
with the Garmin 696 GPS altitude. The Dynon was high by 100 ft. I used the
Dynon altitude adjustment to set it to match the GPS (-100ft). The readings
above were after this adjustment.
-
Matt "Red Dawg" Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 48+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
Message 2
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| Subject: | RE: RV7-List Digest: 1 Msgs - 12/29/11 |
Because of normal "randomness" in density distributions in the atmosphere,
differences between GPS and pressure altitude are expected. "Correcting"
them away is likely to make your altimeter wrong at the surface (where it
really matters) and not match other aircraft you may be flying among.
That said, 100 feet is well within the error allowed for a calibrated
pitot-static system anyway.
As for your numbers, all I ended up seeing in your email was "Emacs!", so
I'm guessing that there was a graphic that didn't make it through the digest
version of the mailing list. :)
-----Original Message-----
From: owner-rv7-list-server@matronics.com
[mailto:owner-rv7-list-server@matronics.com] On Behalf Of RV7-List Digest
Server
Sent: Friday, December 30, 2011 12:01 AM
Subject: RV7-List Digest: 1 Msgs - 12/29/11
*
=================================================
Online Versions of Today's List Digest Archive
=================================================
Today's complete RV7-List Digest can also be found in either of the two Web
Links listed below. The .html file includes the Digest formatted in HTML
for viewing with a web browser and features Hyperlinked Indexes and Message
Navigation. The .txt file includes the plain ASCII version of the RV7-List
Digest and can be viewed with a generic text editor such as Notepad or with
a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter
11-12-29&Archive=RV7
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter
2011-12-29&Archive=RV7
===============================================
EMail Version of Today's List Digest Archive
===============================================
----------------------------------------------------------
RV7-List Digest Archive
---
Total Messages Posted Thu 12/29/11: 1
----------------------------------------------------------
Today's Message Index:
----------------------
1. 07:37 PM - Re: Dynon Skyview Airspeed Calibration... (Matt Dralle)
________________________________ Message 1
_____________________________________
Time: 07:37:26 PM PST US
From: Matt Dralle <dralle@matronics.com>
Subject: RV7-List: Re: Dynon Skyview Airspeed Calibration...
At 07:39 PM 12/26/2011 Monday, you wrote:
>--> RV-List message posted by: Matt Dralle <dralle@matronics.com>
>
>Dear Listers,
>
>I've been flying the new 10" Dynon Skyview in the RV-6 for a few weeks
>now and
it seems like the airspeed is reading maybe 10mph fast. The GS always reads
10mph or more slower than the True airspeed, no matter which way I fly with
respect to the current wind. Looking through the configuration options on
the Skyview, I'm not seeing parameters to calibrate the airspeed. If the
airspeed were *slow* compared to the GS, I could envision making adjustments
to the Pitot tube to get it in better alignment with slipstream. But *fast*
is a head scratcher.
If there's no electronic configuration parameters to adjust, what do you do?
Are there Pitot line "attenuators" like for RF in coax? ;-)
>
>Matt
Listers,
I went flying tonight in the RV-6 around sunset and took some airspeed
numbers flying the four points of the compass. I let each direction
normalize for about
2 minutes before taking the readings. I've still got my little black-tape
washer deals on the static ports that I detailed in a previous email.
Do these numbers make any sense?
Emacs!
I set the altimeter to 30.15 (KLVK ATIS). I compared the Dynon altitude
with the Garmin 696 GPS altitude. The Dynon was high by 100 ft. I used the
Dynon altitude adjustment to set it to match the GPS (-100ft). The readings
above were after this adjustment.
-
Matt "Red Dawg" Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 48+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
Message 3
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|
| Subject: | Re: Dynon Skyview Airspeed Calibration... |
I think one can calculate from the GPS numbers that you had a 14 MPH
(approx) wind from the WNW and you were doing 182 TAS. Your IAS would
appear to be 12 MPH too high.
From: Matt Dralle
Sent: Thursday, December 29, 2011 10:33 PM
rv7-list@matronics.com ; rv10-list@matronics.com
Subject: RV7-List: Re: Dynon Skyview Airspeed Calibration...
At 07:39 PM 12/26/2011 Monday, you wrote:
--> RV-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Listers,
I've been flying the new 10" Dynon Skyview in the RV-6 for a few weeks
now and it seems like the airspeed is reading maybe 10mph fast. The GS
always reads 10mph or more slower than the True airspeed, no matter
which way I fly with respect to the current wind. Looking through the
configuration options on the Skyview, I'm not seeing parameters to
calibrate the airspeed. If the airspeed were *slow* compared to the GS,
I could envision making adjustments to the Pitot tube to get it in
better alignment with slipstream. But *fast* is a head scratcher. If
there's no electronic configuration parameters to adjust, what do you
do? Are there Pitot line "attenuators" like for RF in coax? ;-)
Matt
Listers,
I went flying tonight in the RV-6 around sunset and took some airspeed
numbers flying the four points of the compass. I let each direction
normalize for about 2 minutes before taking the readings. I've still
got my little black-tape washer deals on the static ports that I
detailed in a previous email.
Do these numbers make any sense?
I set the altimeter to 30.15 (KLVK ATIS). I compared the Dynon altitude
with the Garmin 696 GPS altitude. The Dynon was high by 100 ft. I used
the Dynon altitude adjustment to set it to match the GPS (-100ft). The
readings above were after this adjustment.
-
Matt "Red Dawg" Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 48+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer
Mode
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