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ACK E04 ELT MOUNTING

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bob88

Joined: 24 Feb 2013
Posts: 99

Posted: Sun Sep 08, 2013 8:15 pm Post subject: ACK E04 ELT MOUNTING

I noted that Tim Olson has mounted the ELT basically under the vertical stabilizer and between the elevator trim control cables. For the ACK unit, it seems that it will be a very tight fit. Anyone done it? Photo? Also, how does the antenna live under the fairing with the 20 degree angle?

johngoodman

Joined: 18 Sep 2006
Posts: 530
Location: GA

Posted: Mon Sep 09, 2013 5:17 am Post subject: Re: ACK E04 ELT MOUNTING

Make it easy to get to, behind the baggage bulkhead. Put the antenna on the top - nobody notices antennas anyway. Keep in mind that it uses an "almost" ordinary telephone cord between it and your panel. You need that cord in place when pulling wires.

John

_________________
#40572 Phase One complete in 2011

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Mon Sep 09, 2013 6:08 am Post subject: ACK E04 ELT MOUNTING

While I agree with mounting the ELT in the area behind the baggage 

compartment, I don't agree with mounting the antenna just anywhere on top.

Antennas and spacing do matter. You need at least 2 ft from any com or 

GPS antenna, and 3 ft is better. The closer the ELT antenna is to the 

vertical stabilizer the better it will be protected from crash damage.  

The neat, out of sight mounting between the vert and horiz stabilizers 

under the fiberglass fairing is probably the best crash protected 

location.  While the manufacturer's instructions call for mounting 

within 20 or 30 degrees of vertical, it is somewhat difficult to define 

where vertical will be post-crash.  I mounted mine on the rear most 

bulkhead before the vertical stab, and will use a nylon wire clamp to 

keep the other end of the antenna clear of any metal.

There is one other issue with ELT antennas that is rarely discussed. The 

121.5 transmitters are easily excited by TV and FM signals which are 

close in frequency, and they re-radiate that energy. If there is a com 

antenna anywhere near the ELT antenna it can cause a nasty squelch break 

that interferes. I had this problem with my Mooney when all the com 

antennas were on top of fuselage.  I was able to greatly reduce it by 

moving one com antenna to the belly. Yes, newer ELTs are supposed to 

have better suppression of this "feature" but I doubt they have 

eliminated it. Likewise any VHF transmission anywhere near your GPS 

antenna creates potential for interference with GPS. So mounting your 

ELT as far away from other antennas as possible is beneficial.



On 9/9/2013 6:17 AM, johngoodman wrote:

 	  Quote: 	
		   



 Make it easy to get to, behind the baggage bulkhead. Put the antenna on the top - nobody notices antennas anyway. Keep in mind that it uses an "almost" ordinary telephone cord between it and your panel. You need that cord in place when pulling wires.

 John



 --------

 #40572 Phase One complete and flying.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=408262#408262

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

rv10pro(at)gmail.com
Guest

Posted: Mon Sep 09, 2013 7:17 am Post subject: ACK E04 ELT MOUNTING

As a guy who tests ELTs and gets paid to do it, Kelly's advise is invaluable.  Cosmetically hiding ELT antenna produced too many units which won't propagate an adequate signal.  It looks like you have a unit but the signal strength is inadequate.  

John On Sep 9, 2013 7:17 AM, "Kelly McMullen" <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:[quote] --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 

 While I agree with mounting the ELT in the area behind the baggage compartment, I don't agree with mounting the antenna just anywhere on top.

 Antennas and spacing do matter. You need at least 2 ft from any com or GPS antenna, and 3 ft is better. The closer the ELT antenna is to the vertical stabilizer the better it will be protected from crash damage.  The neat, out of sight mounting between the vert and horiz stabilizers under the fiberglass fairing is probably the best crash protected location.  While the manufacturer's instructions call for mounting within 20 or 30 degrees of vertical, it is somewhat difficult to define where vertical will be post-crash.  I mounted mine on the rear most bulkhead before the vertical stab, and will use a nylon wire clamp to keep the other end of the antenna clear of any metal.

  There is one other issue with ELT antennas that is rarely discussed. The 121.5 transmitters are easily excited by TV and FM signals which are close in frequency, and they re-radiate that energy. If there is a com antenna anywhere near the ELT antenna it can cause a nasty squelch break that interferes. I had this problem with my Mooney when all the com antennas were on top of fuselage.  I was able to greatly reduce it by moving one com antenna to the belly. Yes, newer ELTs are supposed to have better suppression of this "feature" but I doubt they have eliminated it. Likewise any VHF transmission anywhere near your GPS antenna creates potential for interference with GPS. So mounting your ELT as far away from other antennas as possible is beneficial.

  

 On 9/9/2013 6:17 AM, johngoodman wrote:

  	  Quote: 	
		   --> RV10-List message posted by: "johngoodman" <johngoodman(at)earthlink.net (johngoodman(at)earthlink.net)>

 

 Make it easy to get to, behind the baggage bulkhead. Put the antenna on the top - nobody notices antennas anyway. Keep in mind that it uses an "almost" ordinary telephone cord between it and your panel. You need that cord in place when pulling wires.

  John

 

 --------

 #40572 Phase One complete and flying.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=408262#408262

 

 

 

 

 

 

 

 	
 

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michael(at)sausen.net
Guest

Posted: Mon Sep 09, 2013 7:23 am Post subject: ACK E04 ELT MOUNTING

Couldn't get mine to fit there anymore when I switched, ended up making a spot for it next to the batteries like others.



Michael



--

aerosport1

Joined: 07 Nov 2007
Posts: 231

Posted: Mon Sep 09, 2013 8:42 am Post subject: ACK E04 ELT MOUNTING

I built little aluminum standoffs and works great



Geoff Combs 



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_________________
Geoff Combs
RV-10 QB N829GW
Flying 500 hrs
40033

michael(at)sausen.net
Guest

Posted: Mon Sep 09, 2013 10:50 am Post subject: ACK E04 ELT MOUNTING

Geoff,



  That's the old 121.5.  The new 406 E-04 is much longer and won't fit.



Michael



--

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Mon Sep 09, 2013 11:01 am Post subject: ACK E04 ELT MOUNTING

Not true....  I added legs to my bracket on the new E-04 and that makes

it fit fine. I think that's what Geoff was referring to also.

The old one was shaped differently.  The new one I needed to raise

up a little, and then it fit fine.



Here's my write-up from 2011 when I did it.

http://www.myrv10.com/N104CD/upgrades/20110506/index.html



Tim

On 9/9/2013 1:50 PM, Michael Sausen wrote:

[quote] 



 Geoff,



    That's the old 121.5.  The new 406 E-04 is much longer and won't fit.



 Michael



 --

michael(at)sausen.net
Guest

Posted: Mon Sep 09, 2013 11:03 am Post subject: ACK E04 ELT MOUNTING

Interesting, just noticed the one in Geoff's picture is the old one.



Michael



--

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Mon Sep 09, 2013 11:20 am Post subject: Re: ACK E04 ELT MOUNTING

Guys,



This confusion has happened before.

Model E-04 is made by ACK technologies.

Unfortunately Ameri-King (shown in the photo) uses "AK-xxx" for their model numbers and is often confused with ACK.



Bob

_________________
Bob Turner
RV-10 QB

aerosport1

Joined: 07 Nov 2007
Posts: 231

Posted: Mon Sep 09, 2013 11:53 am Post subject: ACK E04 ELT MOUNTING

That is correct. These pictures were over 4 yrs ago. Below is the new 406

Ameriking that is a drop in 

Replacement Pretty much.  See Pictures



Geoff 

Geoff Combs 

Aerosport Modeling and Design

8090 howe industrial pkwy

canal winchester, ohio 43110

614.834.5227p

614.834.5230f

www.aerosportmodeling.com



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_________________
Geoff Combs
RV-10 QB N829GW
Flying 500 hrs
40033

flying-nut(at)cfl.rr.com
Guest

Posted: Mon Sep 09, 2013 11:57 am Post subject: ACK E04 ELT MOUNTING

Not an ACK but here's my ELT mounting       solution  ......

       

       [img]cid:part1.00020103.02090009(at)cfl.rr.com[/img]

       

       It's an ACR/Artex ME406, but you can make the 'shelf' to fit just       about anything.  That's 3/4" alum channel with a piece of scrap       alum riveted between and mounts the ELT.  Those holes allow screw       to go into nutplates to hold everything down.

       I was waiting to talk to folks in a booth at Airventure last year       and was standing next to the Artex booth.  Filled out the entry       for the ELT giveaway while I waited.  Won the raffle!  I hope to       never use it though!    

       Linn

       

       On 9/9/2013 3:20 PM, Bob Turner wrote:

     

      	  Quote: 	
		          	  Quote: 	
		  --> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu> (bobturner(at)alum.rpi.edu)



Guys,



This confusion has happened before.

Model E-04 is made by ACK technologies.

Unfortunately Ameri-King (shown in the photo) uses "AK-xxx" for their model numbers and is often confused with ACK.



Bob



--------

Bob Turner

RV-10 QB





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=408296#408296





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