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jhasbrouck(at)woh.rr.com
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 Posted: Tue Jun 06, 2006 4:15 pm Post subject: Transponder Antenna Placement |
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I'm thinking that a good place for the x-ponder ant. is just behind the
firewall, under the forward part of the tunnel just below the heat duct "T".
What I don't know is what the cowl is like in this area and how far forward
I can place the blade antenna without interference. I read Tim's site and
he indicated his is near the fuel pump which would be a little farther aft.
That sounds like a more crowded area but probably easier to get to if the
need arose. Also, how bad, if at all, would interference with the signal be
from the nose gear? I'm about to rivet the forward bottom skin and want to
double the area and place the nutplates while it's easy. Any suggestions?
John Hasbrouck
#40264
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flysrv10(at)gmail.com
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| Posted: Tue Jun 06, 2006 5:38 pm Post subject: Transponder Antenna Placement |
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I placed mine a little ahead of the fuel pump so I could access it
easily but as far aft as I could. There is some hot gas coming from
the exhaust and I think that might effect the longevity of the
antenna. My plane is not painted and I see scorched marks under the
belly.
I have had done this on my RV6 and 10. Once in a while I am told
"radar contact lost". but it comes back shortly. I am not sure if
this is the traffic controllers problem or the gear leg shadow.
On 6/6/06, John Hasbrouck <jhasbrouck(at)woh.rr.com> wrote:
| Quote: |
I'm thinking that a good place for the x-ponder ant. is just behind the
firewall, under the forward part of the tunnel just below the heat duct "T".
What I don't know is what the cowl is like in this area and how far forward
I can place the blade antenna without interference. I read Tim's site and
he indicated his is near the fuel pump which would be a little farther aft.
That sounds like a more crowded area but probably easier to get to if the
need arose. Also, how bad, if at all, would interference with the signal be
from the nose gear? I'm about to rivet the forward bottom skin and want to
double the area and place the nutplates while it's easy. Any suggestions?
John Hasbrouck
#40264
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Tim(at)MyRV10.com
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| Posted: Tue Jun 06, 2006 5:52 pm Post subject: Transponder Antenna Placement |
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My choice to go aft was for something I think is a good reason. If you
go in the center, right behind the firewall, your exhaust will be
blowing within inches of your antenna. As long as you can get to the
area, adding the doubler won't be too bad later (if you have help
bucking, or use pop rivets (which is what I did). You may want to wait
on locating it until you get a good view of a cowl and can see
see into the future a bit further. As you build, you'll find all
sorts of things that may get in the way, so I'd just keep pounding on
the major structure as much as possible.
Tim Olson - RV-10 N104CD - Flying
do not archive
John Hasbrouck wrote:
| Quote: |
I'm thinking that a good place for the x-ponder ant. is just behind the
firewall, under the forward part of the tunnel just below the heat duct
"T". What I don't know is what the cowl is like in this area and how far
forward I can place the blade antenna without interference. I read
Tim's site and he indicated his is near the fuel pump which would be a
little farther aft. That sounds like a more crowded area but probably
easier to get to if the need arose. Also, how bad, if at all, would
interference with the signal be from the nose gear? I'm about to rivet
the forward bottom skin and want to double the area and place the
nutplates while it's easy. Any suggestions?
John Hasbrouck
#40264
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dlm46007(at)cox.net
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| Posted: Tue Jun 06, 2006 6:17 pm Post subject: Transponder Antenna Placement |
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why not locate it under the right seat? no access or heat considerations
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Tim(at)MyRV10.com
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| Posted: Tue Jun 06, 2006 6:46 pm Post subject: Transponder Antenna Placement |
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Under the seat would be a dandy place for it too. Just make sure it
clears the brake and fuel lines and it should be just great.
Tim Olson - RV-10 N104CD - Flying
do not archive
David McNeill wrote:
[quote]
why not locate it under the right seat? no access or heat considerations
---
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10flyer(at)verizon.net
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| Posted: Tue Jun 06, 2006 6:53 pm Post subject: Transponder Antenna Placement |
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Hey John, I located mine under the right seat where the brake and fuel line
run to the wing root area. It has easy access to place a doubler and to get
to the connector if need be. I have flown 85 hours, mostly with codes from
ATC for IFR or flight following, and have not had any complaints.
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jesse(at)itecusa.org
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| Posted: Wed Jun 07, 2006 7:37 am Post subject: Transponder Antenna Placement |
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That's where the COM's are going, left and right side under the pilots. I
am putting my Xpndr as far forward as I can get to in the center tunnel. I
wonder, with the Vetterman exhaust, if it isn't better going all the way
forward, since the pipes stick out a couple of inches, then with the airflow
it might be less hot right up between them than 6-18 inches back. Just a
thought.
Do not archive.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org
www.itecusa.org
W: 352-465-4545
C: 352-427-0285
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