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  #1  
Old 02-20-2017, 08:31 PM
dave4754 dave4754 is offline
 
Join Date: Oct 2009
Location: Edson, Alberta, Canada
Posts: 325
Default ELT Antennae location

I have agonized over this for months and finally decided to install the Rami 200 elt antennae, it will service a Kinnad Compact ELT.

What are your thoughts on this installation

https://1drv.ms/f/s!Apov9vtfo19vyQRzashmQQ0FsTjO

It is placed just behind the passenger seat and tucked in behind the roll bar post on the shelf on top of the flaps There is no impediment to the flaps and the wiring is safely secured with zip ties and fasteners behind the panel.

I have one of those Commant 200 VHF/GPS antennae on top already and really didnt want to have anymore drag up there.

The signal should go through the plex, I will test this when i get the Kannad recertified.

Any thoughts?
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  #2  
Old 02-20-2017, 09:16 PM
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bret bret is offline
 
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Location: Gardnerville Nv.
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My Kannad is in the baggage area also, the antenna is there too, the new 406 has a built in GPS antenna also so I wanted it to have a clear view of the sky, won't help it I end up upside down, but, I have a spare com antenna lead I can hook up in that case
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  #3  
Old 02-20-2017, 10:41 PM
Bevan Bevan is offline
 
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Location: BC
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Dave,

My Ack 04 antenna is in a similar position. Mounted to a flange riveted to the top fuse longeron. The antenna is bent in a slight curve so it doesn't touch the plexi.

Bevan
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  #4  
Old 02-21-2017, 02:37 PM
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Raymo Raymo is offline
 
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Mine is in the same location but slightly further aft. Since I have a slider, I was able to drill a hole in the turtle deck support bracket and put the tip of the antenna through the hole (barely visible in the photo).

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  #5  
Old 02-21-2017, 03:13 PM
Bavafa Bavafa is offline
 
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Location: Sacramento, CA
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There is a school of thought that believes a crash may cause the plane in an upside down position (specially for a RVx-A) and in such cases the chance of ELT antennae will be in an upside down and not as good for transmitting.

I have mounted mine in the tail portion under the fiberglass cover. I am not saying that it is a better place or worse, only that I thought it has a better chance of survival in a damage.
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  #6  
Old 02-22-2017, 01:21 PM
StickNRudder StickNRudder is offline
 
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Regardless of where the antenna is, give thought to making sure the ant cable survives the crash as well. Routing it well dressed through multiple bulkheads is probably not a good idea.
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  #7  
Old 02-22-2017, 01:59 PM
dave4754 dave4754 is offline
 
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Location: Edson, Alberta, Canada
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Default Thanks all

Not sure if my photos got through i am using the One Drive and it appears it might be asking for passwords, if so my apologies.

I am hoping that any crash will be controlled and flown to the last breath of air under her wings which should leave us upright. That being said the antennae is nearly exactly upright and pointed through the plexiglass.

I was once Air Deputy in CASARA here in Canada and I know how frustrating it can be to try finding a weak signal. The ELT has the facility to advise of impact on 406 MHZ and help SAR techs to find it with 121.5 MHZ locaters.

Lets hope two things:
1/ We NEVER have to use it
2/ It is in the right place for the best signal

Thanks again all it sure is great to have this forum to bounce things like this off people.

Dave
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  #8  
Old 02-28-2017, 07:33 AM
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bret bret is offline
 
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On the 406, how long till the signal gets broadcast if the manual switch is activated on the panel? Is there a delay or instant? My plan should I ever need it is, if ditching in a remote area is to activate the ELT just before.......remote landing-tree branch trimming. So how soon before impact? 30 sec, 90 sec?
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  #9  
Old 02-28-2017, 10:10 AM
dave4754 dave4754 is offline
 
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Location: Edson, Alberta, Canada
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Default ELT activation

i dont know how this KAnnad works but when we used them in Search and Rescue work when the switch was armed it went off right away.

I cant see why that wouldnt still be the case.
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  #10  
Old 02-28-2017, 04:07 PM
rightrudder rightrudder is offline
 
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Location: Laguna Hills, CA
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Quote:
Originally Posted by StickNRudder View Post
Regardless of where the antenna is, give thought to making sure the ant cable survives the crash as well. Routing it well dressed through multiple bulkheads is probably not a good idea.
Good idea. My cable goes through one bulkhead, but I used an oversized bushing and coiled the excess cable together with Velcro straps, so hopefully it'll pay out in a crash and remain intact.
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