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02-20-2019, 09:41 PM
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Join Date: Jan 2005
Location: Victoria, Canada
Posts: 2,251
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Several years ago, I worked with Garmin and Dynon to align their serial ADAHRS and EIS data streams, with a protocol that I called FIX. They both adopted it and it was released in the original G3X and SkyView systems.
Since then, they have been diverging, but it sure would be nice if someone would encourage them (and others) to cooperate as much as possible.
Turns out, that I ended up retiring from commercial avionics development, so I have no skin in the game anymore, but I developed a bunch of stuff that used these serial streams.
V
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V e r n. ====
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RV-9A complete
Harmon Rocket complete
S-21 wings complete
Victoria, BC (Summer)
Chandler, Az (Winter)
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02-21-2019, 07:13 AM
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Join Date: Jul 2018
Location: WNC
Posts: 246
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Quote:
Originally Posted by vlittle
Several years ago, I worked with Garmin and Dynon to align their serial ADAHRS and EIS data streams, with a protocol that I called FIX. They both adopted it and it was released in the original G3X and SkyView systems.
Since then, they have been diverging, but it sure would be nice if someone would encourage them (and others) to cooperate as much as possible.
Turns out, that I ended up retiring from commercial avionics development, so I have no skin in the game anymore, but I developed a bunch of stuff that used these serial streams.
V
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Interesting. I just looked at the streams for both the g3x and the skyview and they have very similar data, albeit in a slightly different format. preamble/sync, type, version, data, checksum, crlf
Skyview extends the data with DA, wind direction, wind speed.
G3x:
Code:
=1115032801+112-00071230050+00984+026-02+1099-001+01274A8
Skyview:
Code:
!1116533112-013+00750451000+02866+018-02+1020-060+261074254+048531481087
D100:
Code:
16014827+042-00331080347+0230-026-03+1020FE32F901BB
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02-24-2019, 01:31 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Been working on another screen option for the HUD project. This one mostly modeled after the F18 HUD. It?s not complete yet but is taking shape.
https://photos.app.goo.gl/WToWLpVgrRhS2FaM8
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02-25-2019, 05:22 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Latest update to the F18 inspired HUD screen include the roll angle and slip/skid indicator at the bottom as well as a flight path marker.
The code for all the "widgets" is coming together. Creating customized screens is getting easier and easier.

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02-25-2019, 05:40 PM
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Join Date: Nov 2010
Location: ____
Posts: 829
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Don't Change Anything
Quote:
Originally Posted by Brantel
Latest update to the F18 inspired HUD screen include the roll angle and slip/skid indicator at the bottom as well as a flight path marker.
The code for all the "widgets" is coming together. Creating customized screens is getting easier and easier.

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Great Work
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02-26-2019, 12:29 AM
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Join Date: Oct 2017
Location: bellingham, wa
Posts: 202
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I have about 1800 hours looking through a similar looking HUD. It was really good for some things, but those are probably not applicable to a light aircraft. For instrument flying, having airspeed and altitude scales, and trend arrows, is much better for use as a flying instrument.
Basically the same as on a standard PFD display. Boxes with digits don't show trends, or deviations, unless you stare at them. Trend arrows and motion of the scales allow you to see the same thing with peripheral vision.
Much mo betta.
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02-26-2019, 07:12 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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No experience at all (yet) flying behind glass, but what svyolo says rings true to me. About 40 years ago, I bought one of the first full-auto SLR cameras, a Canon A-1. Instead of match needles for setting F-stop and exposure, it had a 'digital' display in the viewfinder. A minor nightmare to actually use; you had to stop and read the settings instead of just having a peripheral awareness that the needles matched, as you can do with a match-needle camera. I do worry about transitioning to 'glass' for that reason.
Charlie
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02-26-2019, 07:20 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by svyolo
I have about 1800 hours looking through a similar looking HUD. It was really good for some things, but those are probably not applicable to a light aircraft. For instrument flying, having airspeed and altitude scales, and trend arrows, is much better for use as a flying instrument.
Basically the same as on a standard PFD display. Boxes with digits don't show trends, or deviations, unless you stare at them. Trend arrows and motion of the scales allow you to see the same thing with peripheral vision.
Much mo betta.
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Funny you mention this because the F18 style HUD excludes those items and focuses more on digit displays and not tapes and trend indicators. Exception on the HDG tape and flight path indicator. One member of our team is passionate around keeping with the spirit of that simplicity on this particular screen.
Other widgets I have developed for other screen layouts do show trends like the turn rate indicator, VS trend, etc. The flight path indicator is also a very handy tool. I also have versions of the ASI and ALT display that work as tapes as well.
Bottom line is the flexibility is there to customize the display with tons of options to suit the pilot. These displays can be toggled for different flight modes in flight as well if the pilot wants one style for cruise and another for approaches and another for ???? You get the idea.
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02-26-2019, 07:28 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by rv7charlie
I do worry about transitioning to 'glass' for that reason.
Charlie
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It?s really not a problem with modern EFIS displays since they give you trends and tapes on most variables that move. If you still have trouble though, they have this option for you http://www.vansairforce.com/communit...72&postcount=1
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02-26-2019, 07:36 AM
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Join Date: May 2014
Location: KBVY Massachusetts
Posts: 1,100
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Quote:
Originally Posted by rv7charlie
No experience at all (yet) flying behind glass, but what svyolo says rings true to me. About 40 years ago, I bought one of the first full-auto SLR cameras, a Canon A-1. Instead of match needles for setting F-stop and exposure, it had a 'digital' display in the viewfinder. A minor nightmare to actually use; you had to stop and read the settings instead of just having a peripheral awareness that the needles matched, as you can do with a match-needle camera. I do worry about transitioning to 'glass' for that reason.
Charlie
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Hi Charlie,
I wondered about that myself but I found it to be a very simple transition.
But you could always rent a glass plane and go up with a flight instructor to see how well you handle it.
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Flying RV-8 N880BC
2019 Dues - happily paid.
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