Today's Message Index:
----------------------
1. 04:54 AM - Props (Scott Miller)
2. 09:06 AM - Re: Hidden antenna (LesDrag@aol.com)
3. 09:27 AM - Re: Hidden antenna (LesDrag@aol.com)
4. 09:40 AM - Re: Hidden antenna ()
5. 11:52 AM - Re: Hidden antenna (LesDrag@aol.com)
6. 09:00 PM - Re: Hidden antenna (f1rocket@telus.net)
7. 10:49 PM - Re: Hidden antenna (LesDrag@aol.com)
Message 1
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--> Rocket-List message posted by: "Scott Miller" <scott65@quikenet.com>
Does anybody have tha article, or information, on the comparison of propellers
done by Van's in the RVAtor about comparing the Hartzell, MT, and AC props? If
anyone has it, or knows where I could find it, please let me know. Thank's, Scott
Miller F-1 #123
Message 2
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: LesDrag@aol.com
In a message dated 02/09/2004 10:25:35 PM Pacific Standard Time,
f1rocket@telus.net writes:
Has anyone out there uses the "Advanced Aircraft Electronics High Gail
Aircraft
Antenna Systems" available at AS$?
Esspecially the transponder antenna looks interesting.
Regards,
Jeff
Why would someone advertise a "high gain" antenna.
I thought an antenna with high gain was BAD.
I found the advertisement in AC$. Read the second sentence, again.
"This means that composite aircraft and fabric covered aircraft ..."
Is there a composite F-1 Rocket? :-)
Jim Ayers
Message 3
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: LesDrag@aol.com
Hi All,
If you want "hidden antenna's" in a metal aircraft, turn back one page in the
AC$ catalog to Bob Archer Aircraft Antennas. These are hidden antennas
designed for metal aircraft.
This antennas have a LOW VSWR, and a LOW gain. These are both good things on
an aircraft.
BTW, gain relates to signal direction. A high gain would indicate a signal
in one direction. A low gain would indicate a signal in all directions.
On an aircraft, low gain is good. (All direction signal.)
On a satellite, high gain is good. (One direction signal.)
For a high gain antenna to be a good thing on an aircraft, perhaps the
question really is; "How high do you plan to fly?"
Jim Ayers
Message 4
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: <klwerner@comcast.net>
Would this TXP Antenna work when glued inside the very bottom of the cowl (in the
cooling air exit scoop)
do not archive
----- Original Message -----
From: LesDrag@aol.com
To: rocket-list@matronics.com
Sent: Tuesday, February 10, 2004 10:06 AM
Subject: Re: Rocket-List: Hidden antenna
--> Rocket-List message posted by: LesDrag@aol.com
In a message dated 02/09/2004 10:25:35 PM Pacific Standard Time,
f1rocket@telus.net writes:
Has anyone out there uses the "Advanced Aircraft Electronics High Gail
Aircraft
Antenna Systems" available at AS$?
Esspecially the transponder antenna looks interesting.
Regards,
Jeff
Why would someone advertise a "high gain" antenna.
I thought an antenna with high gain was BAD.
I found the advertisement in AC$. Read the second sentence, again.
"This means that composite aircraft and fabric covered aircraft ..."
Is there a composite F-1 Rocket? :-)
Jim Ayers
Message 5
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: LesDrag@aol.com
According to Bob Archer, the transponder antenna needs to be 6 inches lower
than the firewall when mounted in the bottom of the cowl. It doesn't seem to
fit for the Rocket cowl.
On the other hand, I have a flush mount transponder antenna mounted in my HR2
fuselage on the right side just behind the main spar.
Jim Ayers
Message 6
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: f1rocket@telus.net
Hi Jim,
Thanks for the lesson on High Gain/Low Gain. I didn't know that (or understand
that). I wonder if the marketing group just thought that advertising Low Gain
was a bad thing. I can't see anyone ever wanting a High Gain antenna for any
aircraft like you mentioned.
The reason I looked at these was to try and find a way to hide the transponder
antenna. In the documentation (at least on line) they say all of these
antennas will work in metal aircraft when mounted in the composite tips etc.
I have yet to purchase my transponder, and haven't found much information on
line. I was hoping I could mount the transponder antenna a ways away from the
radio (probably the manual will tell me keep the run as short as possible).
I know the transponder is a rather short antenna, but they keep having the
nasty habit of sticking into my head when I'm under the planes. Just an
alternate reason as well as cutting drag.
Jim, have you put the Archer antenna in your ship? If you have, were you happy
with the results?
I guess bottom line: If the results are not good, then I will drill holes in
my belly and mount the com and transponder down there just like most guys.
Regards,
Jeff
Quoting LesDrag@aol.com:
> --> Rocket-List message posted by: LesDrag@aol.com
>
> Hi All,
>
> If you want "hidden antenna's" in a metal aircraft, turn back one page in the
>
> AC$ catalog to Bob Archer Aircraft Antennas. These are hidden antennas
> designed for metal aircraft.
>
> This antennas have a LOW VSWR, and a LOW gain. These are both good things on
>
> an aircraft.
>
> BTW, gain relates to signal direction. A high gain would indicate a signal
>
> in one direction. A low gain would indicate a signal in all directions.
>
> On an aircraft, low gain is good. (All direction signal.)
> On a satellite, high gain is good. (One direction signal.)
> For a high gain antenna to be a good thing on an aircraft, perhaps the
> question really is; "How high do you plan to fly?"
>
> Jim Ayers
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Hidden antenna |
--> Rocket-List message posted by: LesDrag@aol.com
Hi Jeff,
First item on antennas.
A Bob Archer Sportcraft NAV antenna goes in one wingtip. And the marker
beacon antenna goes in the same wingtip. This is a no drag maximum effective
antenna installation.
(Of course, if you don't have a VOR or 3 light marker beacon, you wouldn't
need either antenna.)
A transponder blade antenna is an excellent compromise for minimum drag,
minimum protrusion and excellent communication.
I installed a flush mount transponder antenna. Also excellent communication.
However, it was a real pain to install properly. (But I guess the first
installation is always like that.)
The belly mounted COM antenna will work fine for moderate distances.
Sometimes for long distances.
The external COM antennas work better on top of the airplane. Except they
would be in the way of a sliding canopy.
The newer wingtips don't allow the vertical height needed for Bob Archer's
wingtip COM antenna to really perform. However, the wingtip COM antenna works
almost as well as the belly mounted COM antenna.
If you have the RV-4 vertical stabilizer, you can install Bob Archer's
vertical stabilizer COM antenna on top of the vertical stabilizer. A fairing is
required over this. I've made a fairing for my RV-3, and for the RV-4 VS.
Optimum communications from this installation.
(I haven't gotten this item up on my website, yet.)
If you don't have a wingtip COM antenna installed for your radios, then the
wingtip COM antenna could be used for the ELT antenna.
I hope this helps.
Jim Ayers
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