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jlisler(at)alltel.net
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 Posted: Thu Feb 08, 2007 6:37 pm Post subject: ELT Antenna |
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What is your current opinion of where the ELT antenna should be installed on
an RV-4? My ACK ELT is mounted on the upper shelf of the baggage
compartment. I am leaning toward mounting the antenna on the topside of the
turtle deck right behind the canopy. If you have a snappy location that is
better concealed I would like to know. The airplane is finished and this is
one of the small details I have left to complete.
Also, what does the large molded rubber base do on the ELT antenna? Is it a
strain relief to keep the antenna from snapping off in the breeze at 200+
MPH? Does it cover something up like a coil or what ever? I want to be able
to trim this rubber off so I can possibly mount the antenna inside the
cabin. However I do not want to destroy the antenna by sawing off something
important.
Jerry Isler
Donalsonville, GA
RV4 N455J
Cessna C140A N9641A
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nuckollsr(at)cox.net
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| Posted: Mon Feb 12, 2007 9:32 am Post subject: ELT Antenna |
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At 09:30 PM 2/8/2007 -0500, you wrote:
| Quote: |
What is your current opinion of where the ELT antenna should be installed
on an RV-4? My ACK ELT is mounted on the upper shelf of the baggage
compartment. I am leaning toward mounting the antenna on the topside of
the turtle deck right behind the canopy. If you have a snappy location
that is better concealed I would like to know. The airplane is finished
and this is one of the small details I have left to complete.
|
Most installations are done just ahead of the vertical fin.
The idea is that the fin structure offers a modicum of
protection from damage if the airplane comes to rest upside
down. The location you propose would function just fine.
| Quote: | Also, what does the large molded rubber base do on the ELT antenna? Is it
a strain relief to keep the antenna from snapping off in the breeze at
200+ MPH? Does it cover something up like a coil or what ever? I want to
be able to trim this rubber off so I can possibly mount the antenna inside
the cabin. However I do not want to destroy the antenna by sawing off
something important.
|
If you're a prone to genuflect before those with airs
of authority, you don't want to modify the antenna
in any way . . . I discovered a few months ago that
ELTS are now qualified under the TSO as a set of
components. Whether or not removing the rubber hurts
performance will not matter to one who slices and dices
regulations.
Given the multi-frequency requirements for modern
ELT transmitters, it is quite possible that the molded
rubber base has some kind of electro-smarts built in.
I don't think I'd mess with it.
Bob . . .
----------------------------------------
( IF one aspires to be "world class", )
( what ever you do must be exercised )
( EVERY day . . . )
( R. L. Nuckolls III )
----------------------------------------
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