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GPS and ELT Antennae mounting

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jeff(at)westcottpress.com
Guest

Posted: Wed Aug 11, 2010 2:47 pm Post subject: GPS and ELT Antennae mounting

I'm about to rivet on the F-1074 (tail cone forward top skin).  All of  

my wires are routed and secured... all of my d-subs are assembled...  

all of my TNC and BNC connectors are crimped on and ready to go.  The  

last things I think I might need to consider are my GNS-430W and ELT  

antenna doublers (they will mount to the F-1074).  As I'm currently  

operating in an "economy" phase of the build (I don't want to buy  

anything I don't have to to keep moving ahead), I don't have these  

antennae.  Is this something I can easily do with the F-1074  

attached?  Does anyone have pictures of these antennae mounted?  Is  

there anything I'm not thinking of here?



Thank you all, as always,

Jeff Carpenter

40304

Wires, wires everywhere

dmaib@me.com

Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida

Posted: Wed Aug 11, 2010 4:30 pm Post subject: Re: GPS and ELT Antennae mounting

Jeff, I left that top forward skin off until very late in the build. I installed my gps antennas on the tailcone top just aft of that skin, so having if off made the job very easy.

Having the access from the top as long as possible was a good thing.

_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

jeff(at)westcottpress.com
Guest

Posted: Wed Aug 11, 2010 4:50 pm Post subject: GPS and ELT Antennae mounting

yep, David... that's been my approach.  I'm thinking I'm late in the  

build and it's time to put it on.  My need to not spend much money at  

the moment is the only thing that has me hoping that I can add the  

doublers later, when I fork over the big bucks for the 430W, without  

too much trouble.

On Aug 11, 2010, at 5:30 PM, dmaib(at)me.com wrote:



 	  Quote: 	
		   



 Jeff, I left that top forward skin off until very late in the build.  

 I installed my gps antennas on the tailcone top just aft of that  

 skin, so having if off made the job very easy.

 Having the access from the top as long as possible was a good thing.



 --------

 David Maib

 RV-10 #40559





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=308425#308425

carl.froehlich(at)verizon
Guest

Posted: Wed Aug 11, 2010 5:08 pm Post subject: GPS and ELT Antennae mounting

Another approach is to mount the GPS antennas on top of the glare shield,

and the ELT antenna under the empennage fairing.  On my 8A I covered the

white Garmin GPS antenna with dark cloth to eliminate glare.  The GPS and XM

antennas for the 396 are also mounted on the glare shield.  I'll do the same

on my RV-10 project.



Carl Froehlich



--

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Wed Aug 11, 2010 5:24 pm Post subject: GPS and ELT Antennae mounting

You want to pay attention to distance requirements for the GPS

antenna, probably at least  2 ft from any com antenna, including ELT.

On Wed, Aug 11, 2010 at 5:49 PM, Jeff Carpenter <jeff(at)westcottpress.com> wrote:

 	  Quote: 	

 yep, David... that's been my approach.  I'm thinking I'm late in the build

 and it's time to put it on.  My need to not spend much money at the moment

 is the only thing that has me hoping that I can add the doublers later, when

 I fork over the big bucks for the 430W, without too much trouble.

 On Aug 11, 2010, at 5:30 PM, dmaib(at)me.com wrote:

> 

>

> Jeff, I left that top forward skin off until very late in the build. I

> installed my gps antennas on the tailcone top just aft of that skin, so

> having if off made the job very easy.

> Having the access from the top as long as possible was a good thing.

>

> --------

> David Maib

> RV-10 #40559

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p=308425#308425

>

>

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

jcumins(at)jcis.net
Guest

Posted: Wed Aug 11, 2010 5:33 pm Post subject: GPS and ELT Antennae mounting

You want to make sure the elt antenna is in a location protected from damage

incase of a roll over.  Ie hack just fwd of the Vert stab.  That is a

requirement on a certified product.  I do not know how affective the antenna

would be, being under the fairing panel in the Vert stab either, there

designed to be vertically mounted not horizontally.



John G. Cumins

President

 



2499 B1 Martin Rd

Fairfield Ca 94534

707-425-7100

707-425-7576 Fax

 

Your Total Technology Solution Provider



--

carl.froehlich(at)verizon
Guest

Posted: Wed Aug 11, 2010 5:58 pm Post subject: GPS and ELT Antennae mounting

One consideration is the aircraft attitude after a crash.  The ELT antenna

mounted horizontally but in a protected area under the empennage fairing may

just be vertical when you need it most.  If the aircraft flips over, a  roof

mounted antenna is not much good.



Carl Froehlich



--

rene(at)felker.com
Guest

Posted: Wed Aug 11, 2010 6:03 pm Post subject: GPS and ELT Antennae mounting

Just to be the first wise guy......what will the orientation of the airplane

be after it crashes.  



I put mine under the fairing, but may change when I go to the new unit.



Rene' Felker

N423CF

801-721-6080



--

jump2(at)sbcglobal.net
Guest

Posted: Wed Aug 11, 2010 6:46 pm Post subject: GPS and ELT Antennae mounting

Would you put your com antenna in the fairing, if you do what  great transmission and reception you would have.

The elt antenna is a transmitter and very flexible. If you do go on your  back if you should have a accident you still have two sides open but think how much you have if in the fairing, the vertical and the horizontal is blocking it's signal.

 That's just my two cents.

Patrick Thyssen

N15PT 



--- On Wed, 8/11/10, Carl Froehlich <carl.froehlich(at)verizon.net> wrote:

[quote]

From: Carl Froehlich <carl.froehlich(at)verizon.net>

Subject: RE: Re: GPS and ELT Antennae mounting

To: rv10-list(at)matronics.com

Date: Wednesday, August 11, 2010, 8:56  PM



--> RV10-List message posted by: "Carl Froehlich" <[url=/mc/compose?to=carl.froehlich(at)verizon.net]carl.froehlich(at)verizon.net[/url]>



One consideration is the aircraft attitude after a crash.  The ELT antenna

mounted horizontally but in a protected area under the empennage fairing may

just be vertical when you need it most.  If the aircraft flips over, a  roof

mounted antenna is not much good.



Carl Froehlich



--

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Wed Aug 11, 2010 8:22 pm Post subject: GPS and ELT Antennae mounting

Mooney has FAA approval to mount the 406 ELT in just that same location.



On Wed, Aug 11, 2010 at 7:02 PM, Rene Felker <rene(at)felker.com> wrote:

 	  Quote: 	
		   



 Just to be the first wise guy......what will the orientation of the airplane

 be after it crashes.  



 I put mine under the fairing, but may change when I go to the new unit.



 Rene' Felker

 N423CF

 801-721-6080

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

johngoodman

Joined: 18 Sep 2006
Posts: 530
Location: GA

Posted: Thu Aug 12, 2010 10:35 am Post subject: Re: GPS and ELT Antennae mounting

Since Jeff also mentioned the GNS 430W antenna, how are folks filling the gaps under the antenna on curved surfaces? 

John

_________________
#40572 Phase One complete in 2011

mauledriver(at)nc.rr.com
Guest

Posted: Thu Aug 12, 2010 12:38 pm Post subject: GPS and ELT Antennae mounting

Here's the approach I took to mounting the 430W and other GPS antenna:

http://www.mykitlog.com/users/display_log.php?user=MauleDriver&project=224&category=0&log=96214&row=22



Mounting the 430 antenna on the glass top makes the filling underneath pretty straight forward - just glop some flox/micro mix under it.



After attending a seminar by our local panel shop, I came away believing that the top of the canopy is an optimal location for the 430W antenna.  Mounting the other ones at the top of the windsheild sort of mimics by 396 antenna mount in the Maule and I don't think it will be an eye sore.  I was able to bring 3 cables plus a power and ground lead for the lights through the center post.  Paid some attention to chafe relief at both ends.



Bill "on short vacation from the project" Watson



---- johngoodman <johngoodman(at)earthlink.net> wrote: 

 	  Quote: 	
		   

 

 Since Jeff also mentioned the GNS 430W antenna, how are folks filling the gaps under the antenna on curved surfaces? 

 John

 

 --------

 #40572 QB. Working on Cowling &amp; Panel

 N711JG reserved

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=308547#308547

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