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02-13-2019, 04:06 PM
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Join Date: Aug 2017
Location: Belmond, IA
Posts: 40
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Garmin shopping list for RV8A
Could someone please suggest to me how they would equip the ideal IFR Garmin panel? I printed off their product sheets but there are so many options that Im confused. Thanks
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02-13-2019, 05:03 PM
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Join Date: Jan 2007
Location: Kalispell, MT
Posts: 40
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I think the current minimum is:
G3X for EFIS
G5 for backup
GLwhatever-650 for navigator
Standard nav/comm for 2nd radio
Transponder for ADSB
But I'm just trying to sort it out as well, so someone who actually knows something might chime in and correct me.
__________________
Geek out... 
RV-8: Empennage underway
N406RR reserved
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02-13-2019, 05:06 PM
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Join Date: Aug 2017
Location: Belmond, IA
Posts: 40
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Can you remote mount the transponder and a comm with the ability to operate them from the G3?
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02-13-2019, 05:41 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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I think this one came out nice...
G3X Touch 460, GTN650, G5, GTR20, GMA245, GTX45R, GMC507, GSA28 servos, GAD29, GAD27, Dual GSU25 ADAHRS

__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-13-2019, 05:44 PM
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Join Date: Aug 2017
Location: Belmond, IA
Posts: 40
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I agree, how necessary is dual AHARS?
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02-13-2019, 06:01 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by jlbpropilot
I agree, how necessary is dual AHARS?
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For IFR I consider it necessary, maybe everyone doesn't feel the same way but thats ok.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-13-2019, 08:47 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,573
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How about dual nav/comms? Seems like radios are so good these days that one would be OK?
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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02-14-2019, 12:17 AM
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Join Date: Jun 2007
Location: Atlanta
Posts: 745
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Quote:
Originally Posted by jlbpropilot
I agree, how necessary is dual AHARS?
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Actually, you want 3. If one screws up, how are you going to know which one it is??
(If you're IFR that is)
Last edited by donaziza : 02-14-2019 at 12:33 AM.
Reason: Add IFR note
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02-14-2019, 02:36 AM
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Join Date: Feb 2005
Location: Leawood, KS
Posts: 275
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Great Panel!
I have a functionally similar panel in m 7A (except no remote devices and dual G3X Touch displays). That is exactly how I would build an 8.
It is at a minimum very convenient (and safer) to have two comm radios. I always need to get weather or listen in to Tower/CTAF before being dumped into busy airspace under IFR. Requesting to leave current ATC frequency to do these things is not realistic to me. I have two and really wouldn't consider going with just one.
It's also a great idea to keep 121.5 tuned the second radio while enroute for those days when you miss a call on frequency or you don't get the call before you run out of coverage on the current frequency. They'll find you on 121.5.
With dual GSU AHRS and the G5 (built-in AHRS) you end up with at least 3 attitude sources in this setup.
Walt will have to chime in on the AHRS count as there may also be a "back up" AHRS in the GTX that can be used on a Garmin portable or an Ipad as a 4th attitude source if really needed.
Andy
__________________
Andy Cobb
RV-7A
MO00 & KLXT
Last edited by andyrv : 02-14-2019 at 05:54 AM.
Reason: sp
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02-14-2019, 06:57 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by andyrv
I have a functionally similar panel in m 7A (except no remote devices and dual G3X Touch displays). That is exactly how I would build an 8.
It is at a minimum very convenient (and safer) to have two comm radios. I always need to get weather or listen in to Tower/CTAF before being dumped into busy airspace under IFR. Requesting to leave current ATC frequency to do these things is not realistic to me. I have two and really wouldn't consider going with just one.
It's also a great idea to keep 121.5 tuned the second radio while enroute for those days when you miss a call on frequency or you don't get the call before you run out of coverage on the current frequency. They'll find you on 121.5.
With dual GSU AHRS and the G5 (built-in AHRS) you end up with at least 3 attitude sources in this setup.
Walt will have to chime in on the AHRS count as there may also be a "back up" AHRS in the GTX that can be used on a Garmin portable or an Ipad as a 4th attitude source if really needed.
Andy
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With dual ADAHRS (GSU25) and the G5 you have 3 sources of attitude/air data available so this gives you the tie breaker if something looks weird.
But having dual GSU25's tied to the G3X also gives you AHRS comparison and fall back capability. If one of the GSU's fail the G3X automaticallly switches to the back up and give you an message that you are now on AHRS #2. The units are also comparing data and will give you a message if something is out of tolerence between the 2.
The G5 will also provide AHRS info to the G3X if both GSU25's fail but is not part of the data comparison like the GSU25's do.
Audio panel with dual coms, yea really convenient to have, this gives you 4 freq's available at the touch of a buttom along with the convenience of listening/monitoring things while not leaving your primary freq. I use the audio panel a lot, wouldn't be without one these days.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
Last edited by Walt : 02-14-2019 at 07:00 AM.
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