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1. 11:10 AM - Re: RV7-List: Re: Dynon Skyview Airspeed Calibration... (M. Marcotte)
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| Subject: | Re: RV7-List: 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
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