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Old 04-12-2014, 04:29 AM
N661DJ N661DJ is offline
Join Date: Feb 2006
Location: Winter Haven
Posts: 285
Default GPS antenna location

I am installing the Dynon Skyview GPS in my 8A and was wondering where
to place the GPS antenna. I have seen GPS antennas placed under the top fiberglass cowling?? this would be ideal, but was concerned as to the performance.
Other suggestions???
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Old 04-12-2014, 04:51 AM
eddieseve eddieseve is offline
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 588

I have both my gps antennas Dynon and Garman under the cowl and have no issues with reception or heat.

Also it's a real easy install, no reflections in the canopy screen.

Eddie Seve
Sydney Australia
First Flight 16th July 2012
RV-7 Phase 2, 30 Oct 2012
820 hrs Mar 2018
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Old 04-12-2014, 05:58 AM
Skysailor Skysailor is offline
Join Date: May 2011
Location: Atlanta, GA
Posts: 162
Default Works great

I have the Dynon GPS puck under the cowl in an RV4 and inside the fuselage on a Glasair and both work well. You should have no problems.

Paid through 2018! How about you?
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Old 04-12-2014, 05:30 PM
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Brent Colvin Brent Colvin is offline
Join Date: Jan 2005
Location: Olney, Texas
Posts: 143
Default Same here

Under cowl, zero issues
Brent Colvin VAF#147
RV 7 0-360 CS Flying
Comm, Multi, Inst.
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Old 01-19-2016, 01:13 PM
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nigelspeedy nigelspeedy is offline
Join Date: Dec 2008
Location: Tehachapi, CA
Posts: 145
Default Mounted to motor mount

I have my Garmin 430W and Dynon Skyview GPS antennas mounted to a bracket on the engine mount. As long as I am doing aerobatics they work just fine. Not sure if this location would work with the new Dynon 2020 GPS which apparently needs better signal strength for the required integrity.

Where have folks mounted GPS antennas on an 8 externally?


Nigel Speedy
Tehachapi CA
I paid my -VAF- dues July 2017
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Old 01-19-2016, 01:48 PM
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dynonsupport dynonsupport is offline
Join Date: Jun 2005
Location: Woodinville, WA
Posts: 1,493

If the 430W works in your location, we expect the GPS-2020 will as well. Our concern is that the GPS-250 was much more sensitive than the 430W so it could be in a place that a complaint GPS wouldn't work.

I hate to undermine a sale, but I do have to ask- if you have a 430W, why go with the GPS-2020? We can get you ADS-B compliant with a single wire between the 430W and the Dynon transponder.
Dynon Avionics
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Old 01-19-2016, 03:15 PM
aerovin aerovin is offline
Join Date: Nov 2007
Location: Lincoln, CA
Posts: 125

I mounted mine externally between the aft end of the top cowl and the windscreen. Works fine and eliminates any chance of airframe shadowing. Perhaps not as aesthetically pleasing but it works for me.
Scott Thompson
RV-8 N9324Z (flying as of 8/30/15)
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Old 01-19-2016, 06:09 PM
jpowell13 jpowell13 is offline
Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 521

One thing I found out the hard way is that GPS antennae need to be separated by 12 inches or more. Otherwise you can get something called harmonic resonance which degrades reception. John
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Old 01-19-2016, 07:24 PM
Check6 Check6 is offline
Join Date: Apr 2009
Location: Georgetown, Texas
Posts: 77
Default RV8A GPS Antennas

I am in the process of upgrading my panel and in discussions with Garmin, the install manual, and the person who helping me install it is very knowledgeable about electrons and the regulations we are installing it on the turtle deck under the canopy. I know it would look better under the cowling for sure but the IFR regs are clear, if you are going to operate IFR and the Garmin folks have had cases where you still have GPS but you do not have full WAAS capability, plus heat is an enemy of the antenna - may take a lot of time but is a risk according to the specs, not something you want to risk if you really need it or plan to use it in my opinion. I placed my back up GPS for the G3X on the glare shield on one side and placed my D2 back up on the other side to keep them as many inches away from each other as possible. Hope this is helpful to you.
Bobby "Luke" Lucroy
Georgetown, Texas (GTU) RV-8A
Falcon Flight Formation Team Flyer
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Old 01-19-2016, 11:02 PM
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nigelspeedy nigelspeedy is offline
Join Date: Dec 2008
Location: Tehachapi, CA
Posts: 145

Super paint job and photo Carl. A neat out of the way location for the antenna, in hindsight I think it would have been better to do the same.

My G430W and Dynon GPS 250 antennas are mounted on the same plate right next to each other and the only drop outs I have experienced are when I am upside down or when there has been NOTAMed GPS jamming testing going on at China Lake.

Nigel Speedy
Tehachapi CA
I paid my -VAF- dues July 2017
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