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bbreckenridge(at)gmail.co
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 Posted: Tue Feb 09, 2016 8:00 pm Post subject: Way Off Topic |
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Although our RV-10 has an engine and wings, between the two we got sidetracked on an MK-1 Christavia plans built aircraft which is soon to fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the Christavia. Now, I may have goofed.
Does the antenna need an aluminum ground plane? If so, how big? This is a fabric plane, similar to a Champ.
Bruce Breckenridge
RV-10 Wings/engine done. SN (gulp!) 40018
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cooprv7(at)yahoo.com
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| Posted: Wed Feb 10, 2016 5:13 am Post subject: Way Off Topic |
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Bruce,
Yes, the antenna needs a ground plane but it doesn’t have to be the whole airplane. On my Skybolt I cut an aluminum disc, around 8” diameter but it’s been a long while, and glued it to the inside of the fabric and attached the antenna to it. Worked great. Probably some better answers out there if you do a Google search.
Good luck on your “non-RV-10” 
Marcus
On Feb 9, 2016, at 10:55 PM, Bruce Breckenridge <bbreckenridge(at)gmail.com> wrote:
Although our RV-10 has an engine and wings, between the two we got sidetracked on an MK-1 Christavia plans built aircraft which is soon to fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the Christavia. Now, I may have goofed.
Does the antenna need an aluminum ground plane? If so, how big? This is a fabric plane, similar to a Champ.
Bruce Breckenridge
RV-10 Wings/engine done. SN (gulp!) 40018
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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flying-nut(at)cfl.rr.com
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| Posted: Wed Feb 10, 2016 6:02 am Post subject: Way Off Topic |
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Just think of how much of a 'ground plane' a handheld has.
A metal wing intersection fairing works well on my Pitts with the rubber
ducky attached to the end of the coax.
Linn
On 2/10/2016 8:09 AM, Marcus Cooper wrote:
| Quote: |
Bruce,
Yes, the antenna needs a ground plane but it doesn’t have to be the whole airplane. On my Skybolt I cut an aluminum disc, around 8” diameter but it’s been a long while, and glued it to the inside of the fabric and attached the antenna to it. Worked great. Probably some better answers out there if you do a Google search.
Good luck on your “non-RV-10”
Marcus
On Feb 9, 2016, at 10:55 PM, Bruce Breckenridge <bbreckenridge(at)gmail.com> wrote:
Although our RV-10 has an engine and wings, between the two we got sidetracked on an MK-1 Christavia plans built aircraft which is soon to fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the Christavia. Now, I may have goofed.
Does the antenna need an aluminum ground plane? If so, how big? This is a fabric plane, similar to a Champ.
Bruce Breckenridge
RV-10 Wings/engine done. SN (gulp!) 40018
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| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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rnewman(at)tcwtech.com
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| Posted: Wed Feb 10, 2016 6:29 am Post subject: Way Off Topic |
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On my fabric covered Rans S6-Es I made a 12" square Aluminum plate to mount the bent whip antenna. It's worked great.
Bob Newman
TCW Technologies, LLC
610-928-3420
| Quote: | On Feb 10, 2016, at 8:58 AM, Linn Walters <flying-nut(at)cfl.rr.com> wrote:
Just think of how much of a 'ground plane' a handheld has.
A metal wing intersection fairing works well on my Pitts with the rubber ducky attached to the end of the coax.
Linn
> On 2/10/2016 8:09 AM, Marcus Cooper wrote:
>
>
> Bruce,
> Yes, the antenna needs a ground plane but it doesn’t have to be the whole airplane. On my Skybolt I cut an aluminum disc, around 8” diameter but it’s been a long while, and glued it to the inside of the fabric and attached the antenna to it. Worked great. Probably some better answers out there if you do a Google search.
>
> Good luck on your “non-RV-10”
>
> Marcus
>
> On Feb 9, 2016, at 10:55 PM, Bruce Breckenridge <bbreckenridge(at)gmail.com> wrote:
>
> Although our RV-10 has an engine and wings, between the two we got sidetracked on an MK-1 Christavia plans built aircraft which is soon to fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the Christavia. Now, I may have goofed.
>
> Does the antenna need an aluminum ground plane? If so, how big? This is a fabric plane, similar to a Champ.
>
> Bruce Breckenridge
> RV-10 Wings/engine done. SN (gulp!) 40018
>
>
>
>
>
>
>
>
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carl.froehlich(at)verizon
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| Posted: Wed Feb 10, 2016 7:40 am Post subject: Way Off Topic |
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Bruce,
I’m not familiar with this radio but I assume it is GPS only, no comm. If so, the GPS antenna needs no ground plane. Whatever bracket you can fabricate is fine. This is why they work when mounted on top of fiberglass.
For what it’s worth, standard ¼ wavelength aircraft comm antennas do need a ground plane. The radius of the ground plane needs to also be at least ¼ wavelength. At 120MHZ this works out to be 24” or so. Conventionally this is provided by the skin of the airplane. For composites you can add four or so strips of copper tape on the inside of the fuselage, the ends connected to the base of the antenna. You can also run four or more light wires to the base of the antenna spread out like the spooks on a wheel.
As previous suggested however, for a tube and fabric aircraft mounting the comm antenna to the frame at any point will provide the needed ground plane – no other action is needed.
Carl
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bruce Breckenridge
Sent: Tuesday, February 09, 2016 10:56 PM
To: rv10-list(at)matronics.com; Jesse Saint
Subject: Way Off Topic
Although our RV-10 has an engine and wings, between the two we got sidetracked on an MK-1 Christavia plans built aircraft which is soon to fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the Christavia. Now, I may have goofed.
Does the antenna need an aluminum ground plane? If so, how big? This is a fabric plane, similar to a Champ.
Bruce Breckenridge
RV-10 Wings/engine done. SN (gulp!) 40018
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Wed Feb 10, 2016 12:22 pm Post subject: Way Off Topic |
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For what it is worth, Garmin does require a ground plane for its
Certified GPS antennas. Why, I do not know. I did small aluminum plate
on my RV-10, then added some aluminum tape to extend it where flat plate
would be difficult.
On 2/10/2016 8:36 AM, Carl Froehlich wrote:
| Quote: | Bruce,
I’m not familiar with this radio but I assume it is GPS only, no comm.
If so, the GPS antenna needs no ground plane. Whatever bracket you can
fabricate is fine. This is why they work when mounted on top of fiberglass.
For what it’s worth, standard ¼ wavelength aircraft comm antennas do
need a ground plane. The radius of the ground plane needs to also be at
least ¼ wavelength. At 120MHZ this works out to be 24” or so.
Conventionally this is provided by the skin of the airplane. For
composites you can add four or so strips of copper tape on the inside of
the fuselage, the ends connected to the base of the antenna. You can
also run four or more light wires to the base of the antenna spread out
like the spooks on a wheel.
As previous suggested however, for a tube and fabric aircraft mounting
the comm antenna to the frame at any point will provide the needed
ground plane – no other action is needed.
Carl
*From:*owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Bruce
Breckenridge
*Sent:* Tuesday, February 09, 2016 10:56 PM
*To:* rv10-list(at)matronics.com; Jesse Saint
*Subject:* Way Off Topic
Although our RV-10 has an engine and wings, between the two we got
sidetracked on an MK-1 Christavia plans built aircraft which is soon to
fly. Our C182 has a BK KLN-94, so, to keep it simple, I put one in the
Christavia. Now, I may have goofed.
Does the antenna need an aluminum ground plane? If so, how big? This
is a fabric plane, similar to a Champ.
Bruce Breckenridge
RV-10 Wings/engine done. SN (gulp!) 40018
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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