Today's Message Index:
----------------------
1. 04:55 PM - Re: RV-List Digest: 2 Msgs - 12/23/11 (Bill Christie)
2. 07:44 PM - Dynon Skyview Airspeed Calibration... (Matt Dralle)
3. 07:54 PM - Re: Dynon Skyview Airspeed Calibration... (Kelly McMullen)
4. 08:03 PM - Re: Dynon Skyview Airspeed Calibration... (David Maib)
5. 08:05 PM - Re: Dynon Skyview Airspeed Calibration... (Linn Walters)
6. 09:20 PM - Re: Dynon Skyview Airspeed Calibration... (mr.gsun@gmail.com)
Message 1
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Subject: | Re: RV-List Digest: 2 Msgs - 12/23/11 |
Please cancel all my subscriptions
---- RV-List Digest Server <rv-list@matronics.com> wrote:
*
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Total Messages Posted Fri 12/23/11: 2
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Today's Message Index:
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1. 01:24 PM - Re Video cameras (Martin Hone)
2. 06:52 PM - Re: Re Video cameras (Robin Marks)
________________________________ Message 1 _____________________________________
Time: 01:24:11 PM PST US
Subject: RV-List: Re Video cameras
From: Martin Hone <aerobiz1@gmail.com>
I don't know how the Drift HD170 Stealth goes showing an EFIS display,
though I will be finding out in a week or so, but for steam gauges it is
great.
I have mounted it on the wing ( a bit further forward than most so I get
the u/c) and used it as a helmet cam. Both work great. And the wireless
remote is really useful, as is the ability to rotate the lens. Remember,
it only cost $159
Here are a couple of You tube links that will give you an idea, and despite
not using it in HD1080 mode, just the regular 720, the pictures are
excellent - especially when the camera is played back on the big screen TV
! The only criticism I have at this stage is the funny things it does to
the prop.
Here is a landing from the wing : http://www.youtube.com/watch?v=dWXHznnvLD4
This using it as a helmetcam, showing panel : :
http://www.youtube.com/watch?v=uW6oJgF3I_U
FWIW,
Martin
________________________________ Message 2 _____________________________________
Time: 06:52:10 PM PST US
From: Robin Marks <robin@PaintTheWeb.com>
Subject: RE: RV-List: Re Video cameras
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Message 2
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Subject: | Dynon Skyview Airspeed Calibration... |
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
-
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: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 42+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
Message 3
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Subject: | Re: Dynon Skyview Airspeed Calibration... |
On the static port, it is critical that there be a lip. Whether you used
Van's pop-rivet port or a machined static port, it must not be flush
with the aircraft skin. It needs to stick out about 1/16".
On 12/26/2011 8:39 PM, Matt Dralle 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
>
> -
> 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: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
>
> RV-6 #20916 N360EM "The Flyer"
> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
> Status: 42+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
>
>
Message 4
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Subject: | Re: Dynon Skyview Airspeed Calibration... |
Maybe a static port error? Check out some of Kevin Horton's articles
in Kitplanes. Static port errors can, and do, cause "fast" errors.
IIRC, Kevin says that pitot alignment does not have to be very
precise to be pretty accurate.
David Maib
Rv-10 40559
Flying.
On Dec 26, 2011, at 10:39 PM, Matt Dralle wrote:
>
> 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
>
> -
> 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: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
>
> RV-6 #20916 N360EM "The Flyer"
> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
> Status: 42+ Hours Since Purchase - Upgrades Complete; Now In Full
> Flyer Mode
>
>
Message 5
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Subject: | Re: Dynon Skyview Airspeed Calibration... |
I think you're on the right track ..... airspeed is the measurement of
the difference in pressure between the pitot and static. So, it appears
(to me anyway) that the static pressure is in a lower pressure area than
it 'should be'. You should have two static ports, one on each side of
the fuselage about 1/2 way between wing trailing edge and horizontal
stab leading edge. This should be the area of least disturbed air going
by. Having the ports on each side balances the pressures caused by
slipping and sliding. The port should stick out a little to get out of
the laminar air flow along the fuselage.
Since there's no airflow in either the pitot or static lines, a
restricter won't have any effect. The angle of the pitot to relative
airflow will have some effect on the airspeed reading too.
One of our RV-4 pilots (he bought it, not built it) was complaining
about inaccurate airspeed and we found the single static port above and
forward of the wing leading edge on the left fuselage side. It's a
'washer' about 1" dia and 1/16" thick with a small hole in the center.
It's located right where prop wash will really hit it with turbulent
air. He plans on moving it and installing two ports as above.
Linn
On 12/26/2011 10:39 PM, Matt Dralle 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
>
> -
> 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: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
>
> RV-6 #20916 N360EM "The Flyer"
> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
> Status: 42+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
>
>
Message 6
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Subject: | Re: Dynon Skyview Airspeed Calibration... |
Is it a true vs indicated issue?
Greg
On Dec 26, 2011 7:49 PM, "Matt Dralle" <dralle@matronics.com> wrote:
>
> 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
>
> -
> 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: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
>
> RV-6 #20916 N360EM "The Flyer"
> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
> Status: 42+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer
> Mode
>
>
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