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09-11-2015, 09:41 PM
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Join Date: Oct 2013
Location: Burr ridge Illinois
Posts: 18
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G3x
I am considering all of the same things for my 14 build. Are you aware that you can use the GRT mini to display all engine monitoring info as well as that "all is lost" backup. It seems that this mitigates the need for the second G3x touch.
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09-12-2015, 05:10 AM
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Join Date: Jul 2015
Location: Aiken, SC
Posts: 620
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GTN 635
Saving money with a GTN 625 is an interesting idea, and if you want a comm., you can get the GTN 635 for only a few hundred $ more.
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09-12-2015, 05:22 AM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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I'm kind of coming around to having the 10" G3X touch in front of me (EFIS, Map), a 7" G3X to the right top (charts, engine, backup), 635 right middle (com, gps), audio panel/autopilot right bottom.....
Need to make sure if the 635 dies another radio will work - hence the audio panel. Want to have autopilot via either the G3X or the Mini - autopilot panel.
Looking at radios there isn't a cheaper one than what is built into the 635/650. The redundant radio probably ought to have a panel display because if it is remoted then without a G3X it can't be freq selected. So the stack to the right could have 7" touch, GTN 635/650, COM2, audio panel, autopilot.
So long as power is available, if any one thing fails there is still a radio and still an EFIS?
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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09-13-2015, 07:49 AM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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Okay so lets think about GTN/Radios
I'm thinking I want a NAV radio so as to not give up entirely on ILS/GS approaches; but if the GTN650 fails I lose GPS/NAV/Com1; seems like too much. After much thought the marker function is something I'm not going to worry about.
Another alternative is to have
GTN625 (WAAS GPS)
GNS255A (COM/NAV with panel display)
GTR20 (Remote COM2)
Audio panel like GMA240
Will take up a little more real estate but less lost on a single point failure? Cost of the two options is within a few hundred dollars but that gets eaten up with cabling so lets say the two options cost the same.
Any ideas on the audio panel? Is there something clearly better than the GMA240 in the $1K range? Anything with bluetooth?
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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09-13-2015, 08:51 AM
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Join Date: Mar 2013
Location: Snoqualmie, wa
Posts: 393
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Your Comm/Nav thoughts are pretty much exactly as I have mine now (as I mentioned before) with the exception being I have the GPS-400W instead of the GTN-625. All in all I love my setup with one exception that may or may not apply to the GTN-625. When I am doing a Nav type approach (VOR/ILS) I use the GPS until turning final at which time I manually switch the G3X HSI input source from GPS to Nav (a couple of taps). I understand that the GNS-430 will do this automatically which would be one less thing for me to think about at this critical period of flight.
As far as audio panels I love my GMA-240. No need for marker beacons any longer and for bluetooth I use the bluetooth built into my headset (Bose A20). I lack for nothing that I am aware of. That said I have never flown behind any other modern audio panel.
Oh, and good call on keeping a Nav radio IMO. You never know when GPS will be unavailable. Just read the NOTAM's about "limited" GPS outages due to "testing" and such. It happens and it happens far too often for my comfort in using GPS alone. I also happen to carry my iPad and iPhone with me when I fly because they use both the US GPS system and the GLONASS GPS system. :-)
__________________
Darin
Snoqualmie WA
RV-9A Sold
RV-10 Building - FWF
www.DarinAnderson.com
2020 donation sent!
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09-13-2015, 02:36 PM
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Join Date: Dec 2006
Location: New Orleans, LA
Posts: 474
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Quote:
Originally Posted by MED
Saving money with a GTN 625 is an interesting idea, and if you want a comm., you can get the GTN 635 for only a few hundred $ more.
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Garmin had a deal on the 625, might still be on. it wasn't hundreds, it was several thousand. That's why I bought the 625, then added the coms. Saved about $4K.
__________________
Stoney
First RV-14 Flight 04/17/2016
Serial #140087, N214SW - Sold
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09-13-2015, 02:49 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
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Quote:
Originally Posted by JDA_BTR
Any ideas on the audio panel? Is there something clearly better than the GMA240 in the $1K range? Anything with bluetooth?
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I'd say almost anything is better, unless you like paying $200 to replace an internal fuse. [ fuse? Who uses them anymore?]. Take a look at PS Engineering. A few dollars more, but no comparison inside the boxes.
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09-13-2015, 02:50 PM
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Join Date: Jul 2015
Location: Aiken, SC
Posts: 620
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GTN 625 vs GTN 635
I meant the difference in cost between the 625 and the 635 was only a few hundred dollars. They, of course, list for thousands each.
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09-13-2015, 03:38 PM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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I have the GTN625 coupled to a single G3X Touch. Here are a few notes from my own flights.
- you can do all of your flight planning on the G3X Touch or even with the Garmin Pilot App. I do the latter. You can "send" the FP from the App to the G3X and or to the GTN. You can also "send" a FP from the G3X to the GTN. I have never entered a FP on the GTN.
- you can append an approach to the FP on the GTN easily, even if the FP originated from the G3X or App
- Garmin had a G3X webinar this past week and said the deal on the GTN625 is still available for new G3X Touch purchasers. This makes the GTN625 several thousand less that the GTN635. A GTN625+GTR20 remote COMM is still much less than a GTN635. What you lose is dedicated knobs for radio tuning. A discounted GTN625+GTR200 is still a considerable savings if you have the panel space.
- a single 10" G3X Touch is very capable. However, for IFR I still want a dedicated approach plate somewhere. I "get by" with the split screen of the 10" G3X Touch but am trying out options for also have the ability to see my Nexus 7 just for the approach plate. YMMV.
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09-13-2015, 03:55 PM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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Yes the cost equivalence of a GTN650 and the combo GTN625/GMC255/GTR20 is due to the discount of the GTN625 when you buy the G3X touch. In order to have a NAV function you end up at the same place. If no NAV you can come in 3K less with the 625/GTR200/GTR20 combo. If you don't want any panel radio at all then the 625/20/20 combo will do that; but I'm wanting at least one panel radio....
I'm looking at other NAV/COM radios and there aren't any inexpensive options I can find. Would be nice to find a remoted NAV/COM that integrated at a good price point.
Also I'm probably a year+ from buying my avionics; the fuselage kit isn't ordered yet. So I have no idea if the 625 deal will last.
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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