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  #1  
Old 02-23-2021, 09:46 AM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,388
Default Mini-X versus G5 as backup for G3x

I've been planning on having a Mini-X as a backup with my G3x system. I like the idea of the larger display as compared to the G5, being somewhat visually challenged. It seems to be a well thought out unit too. However, as I start digging into it more, it seems like it might be quite a bit more work to install (magnetometer and possibly ARINC converter) and it won't be integrated with the G3x system as well as if I used a G5 instead.

I'm wondering if others have used the Mini-x with their G3x and could provide some feedback. Plusses and minuses. Thanks.
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  #2  
Old 02-23-2021, 04:45 PM
N49ex N49ex is offline
 
Join Date: Apr 2015
Location: Wheaton, Illinois
Posts: 102
Default Mini-X versus G5 as backup for G3x

I had a Mini-X as my backup for my G3X Touch because at the time the G5 was not yet out there. Since then I have replaced the Mini-X with a G5. One attraction of the Mini-X was the map/GPS capability, but in actual use, I found it not very helpful. First, managing the display with a route was way too cumbersome. Most importantly, if you are using the map page you lose the primary display, which is the most important backup function - keeping the dirty side down, and so in backup usage, the maps are not practically available. Also, the G5 battery is much better. Mine easily surpasses the 4 hour spec. And of course there is the Garmin integration - it is a wonder to behold the G5 taking over the autopilot function from a disabled G3X. Set baro on one G device, and it is set on all automatically, the flight display format, look and feel are the same on the G5 as the G3X, etc. So, I use the G5 as the backup for primary functions, and bring my iPad for map backup JIC. That said, the Mini-X is a nice device and nice display, higher resolution than the G5, but that probably is a contributor to its battery life.
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  #3  
Old 02-23-2021, 06:16 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 7,184
Default

You can do a search, and find many debates about whether a true back-up device should be (1) integrated with everything else, or (2) isolated from everything else, standing alone. There are pluses and minuses for both.
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  #4  
Old 02-23-2021, 06:49 PM
rocketbob's Avatar
rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,647
Default

My $.02.

I would get a Mini with the magnetometer, backup battery and database options and have it completely disconnected from the Garmin stuff for a true standalone backup system.
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  #5  
Old 02-23-2021, 08:42 PM
N49ex N49ex is offline
 
Join Date: Apr 2015
Location: Wheaton, Illinois
Posts: 102
Default Mini-X versus G5 as backup for G3x

For what it's worth, talking to Steve at G3Xpert the software in the G5 is a completely independent implementation from the G3X, OS and all. The hardware is the identical/same as the certified version of the G5. They thought about this.
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  #6  
Old 02-23-2021, 10:51 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
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Default

A while back a read through some of the threads regarding backup independence. I think I agree in concept that the backup unit should be independent, but it seems Garmin has made an attempt at that. Still the G5 shares interfaces/functions with the G5 and so conceptually may not be as isolated as a Mini-X backup. However, there is the day to day usefulness of this unit and not having it integrated with the G3x means that it may be more cumbersome to setup and etc.

N49ex, Do you have a 430 or 650 connected to your backup unit?
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  #7  
Old 02-24-2021, 04:54 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 39
Smile Backup EFIS

Four years ago I decided to replace the old instrument panel with the G3Xt.
I told the avionics shop in Czech republic that I wanted the Dynon D10A as a back up EFIS. In late October the shop called and said the installation was finished. The system had been on ground power for 24 hours and signed of by manager.
I traveled on a regular flight to the Czech republic to pick up the plane.
Everything worked nicely so I departed late in the afternoon for the 4 h flight
to Stockholm Sweden. After 1 h 30 min red crosses started to appear on the
G3Xt, within 10 min everything was crossed out. All that was left working was the GNS430W + GTX330 + D10A EFIS. It was dark, IMC and raining over Poland, no engine instrument. I new the tank was full of 100 LL.
I got home safely and I was glad for my decision to install a separate EFIS.
As it turned out the avionics shop had installed the Can bus terminators on all parts in the system. It should have been only one at each end of the can bus.
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  #8  
Old 02-24-2021, 05:40 PM
N49ex N49ex is offline
 
Join Date: Apr 2015
Location: Wheaton, Illinois
Posts: 102
Default Mini-X versus G5 as backup for G3x

Quote:
Originally Posted by rapid_ascent View Post
A while back a read through some of the threads regarding backup independence. I think I agree in concept that the backup unit should be independent, but it seems Garmin has made an attempt at that. Still the G5 shares interfaces/functions with the G5 and so conceptually may not be as isolated as a Mini-X backup. However, there is the day to day usefulness of this unit and not having it integrated with the G3x means that it may be more cumbersome to setup and etc.

N49ex, Do you have a 430 or 650 connected to your backup unit?
I have a 750xi (which recently replaced a regular 750). I presume you mean the RS-232 link. Which BTW requires a bit of fuss - paralleling - as the 6/750s support only one link with the required protocol, and there are 2 places that need it! Goofy, but Garmin has a write up on it...)

I agree with your overall comments - I am happy with the independence (and have tested it) and really like the look and feel commonality. Pull the G3Xt breaker and you have no problem absorbing info as you shift your glance to the G5. And as said, you set baro in just one place. Same with SW updates -update the G3Xt and all other units that have updates come with it automatically, including the G5.

Reinhard Metz

Last edited by N49ex : 02-24-2021 at 05:42 PM. Reason: Added more stuff.
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  #9  
Old 02-24-2021, 08:12 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
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Default

Quote:
Originally Posted by N49ex View Post

I agree with your overall comments - I am happy with the independence (and have tested it) ........... And as said, you set baro in just one place. Same with SW updates -update the G3Xt and all other units that have updates come with it automatically, including the G5.
You really mean "sort of independence". You're hoping no sort of crazy software error can propagate over the baro setting link. Or the software update link.

I went with RocketBob's approach: different brand for back up EFIS, absolutely no connections to main EFIS. Yes, I have to set baro settings in two places.
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  #10  
Old 02-24-2021, 09:22 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,388
Default

I don't think setting the Baro twice would be a big deal. That level of inconvenience is obviously not a problem for me.

Today though I was trying to figure out about hooking up the ARINC to both the G3x system through my GAD29 and the connecting to the GRT ARINC adapter to the Mini-AP. If I want to do all that, which I'm not sure I do. Then, do I need a switch for the G3x/Mini output selection to my GNS430?
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2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
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