Today's Message Index:
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1. 07:50 PM - 2-10 Switch (David Oakes)
2. 09:16 PM - Re: Dynon Skyview Airspeed Calibration... (Matt Dralle)
3. 09:50 PM - Re: 2-10 Switch (Matt Dralle)
4. 10:33 PM - Dynon Skyview vs. GRT HX EFIS... (Matt Dralle)
Message 1
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I need to understand how this type of switch works. My goal is to turn on two landing
lights and then turn off one to use as a taxi light.
Thanks for help in advance.
Dave
Message 2
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| Subject: | Re: Dynon Skyview Airspeed Calibration... |
At 07:39 PM 12/26/2011 Monday, 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
Listers,
Thank you for all the great suggestions on resolving this airspeed issue! I took
a look at the static ports on the RV-6 today and found that they are done using
a flush head screw with a hole drilled in the center on either side of the
fuselage. They do *not* protrude from the side of the plane at all. They are
totally flush (see attached picture). Just for fun, I whipped up a couple
of quick test deals using a 3/16" washer and some electrical tape. I poked a
1/16" hole in the center of the tape and then put the washer centered over the
static ports on both sides of the fuselage (see attached pictures). Then, I
went flying on this beautiful December 27 day in California!
I didn't have time to do any real scientific multi-leg testing, but I was amazed
that the True Airspeed is now falling in a much more believable range compared
to the GPS-derived ground speed. On one cross-country leg, I had an exactly
90 degree crosswind component and the True Airspeed and GPS Ground Speed were
tracking exactly the same. Yahoo!
Obviously I need to do some additional, more scientific measurements and probably
come up with a slightly more "permanent" washer arrangement, but the early
returns are very promising! :-)
Thanks again for all the great feedback!
Matt
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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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At 07:47 PM 12/27/2011 Tuesday, you wrote:
>
>I need to understand how this type of switch works. My goal is to turn on two
landing lights and then turn off one to use as a taxi light.
>
>Thanks for help in advance.
>Dave
Hi Dave,
Are you saying that you want to flip the switch UP and have both the Landing light
and the Taxi light ON, and then flip the switch DOWN and just have the Taxi
light ON and the Landing light OFF? In the Center position both Landing and
Taxi lights would be OFF?
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: | Dynon Skyview vs. GRT HX EFIS... |
>At 09:47 PM 12/27/2011 Tuesday, you wrote:
>I have looked at the Dynon stuff up at Arlington Air Show the past two years
>and really like the looks of them. They added autopilot and said last year
>that they were about to announce communications added to their system. A
>single 10" screen to do everything would be pretty easy to install learn to
>operate. Mostly Dynon looks best in the magazines. I guess you get used to
>any of them or they would not all still be in business.
>Pete
I have a Dynon 10" Skyview in the RV-6:
http://www.mattsrv6.com/users/display_log.php?user=MattsRV6&project 43&category=0&log=138164&row=45
http://www.mattsrv6.com/users/display_log.php?user=MattsRV6&project 43&category=0&log=138163&row=46
and a triple GRT HX setup in the RV-8:
http://www.mattsrv8.com/users/display_log.php?user=MattsRV8&project=638&category=2973&log'376&row=134
http://www.mattsrv8.com/users/display_log.php?user=MattsRV8&project=638&category=2973&log'375&row=135
I've flown the GRT HX setup about 170 hours and the Dynon Skyview system about
45 hours now.
Which do I prefer? That's a tough call. There are parts about each system that
I like a lot...
The installation and configuration of the Dynon is easier. Instructions are also
better. The network cable interconnect system that Dynon uses (I think it
is just RS485, but it works well) is also a no-brainer to install. Their display
(PFD/Engine/Map) are definitely very pretty and demo well.
The GRT is a little harder to get installed, the manual is a little sketchy in
places and there are a LOT of configuration options that can seem daunting at
first. BUT, there is power and utility in those options. If you use them to
your advantage, you can probably do more, better on the GRT compared to the Dynon.
The displays on the GRT don't have the "3D-y", "Windows-y" look to them.
BUT, I think I'm preferring that at this point. Doing a scan on the GRT looking
for something out of the ordinary is quicker and more accurate. I also like
the PFD layout and operation on the GRT better. It feels more "accurate"
and "believable" to me for some reason. I never quite "trust" what I'm seeing
on the Dynon for some reason and I don't know why. Maybe I just need more time
on the Dynon.
So, the Dynon has it for Installation and Configuation, but the GRT has it for
Operation and Presentation as far as I'm concerned. If I was building a new plane,
I think that I would probably go with the GRT. But its a close race. I
really like the Dynon system too.
I guess I'm saying if you're in the market for a full-featured EFIS system, give
GRT and Dynon both very close look before you make your selection. In my opinion,
it comes down to personal preferences in a few select areas on which way
to go. Both systems are top notch.
BTW, Dynon's autopilot add-on for the Skyview which I have in the RV-6 works well.
Its a good autopilot that does the job. The servos are the same as with
the TruTrak system. In the RV-8, I have the TruTrak Digiflight II VSGV system.
The TruTrak is a smoother, more accurate autopilot in my opinion, and I would
go that route again. But, it also costs quite a bit more than just adding
servos to the Dynon or GRT.
$.02
-
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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