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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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 Posted: Sat Sep 15, 2007 10:15 am Post subject: Antenna placement and adequate ground plane or ground wire t |
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Much of the consternation in finalizing RV-10 kit completion is the delay in choice of avionics, the choice of antenna, selecting antenna placement, and then final ground strapping/ground plane/ ground wire lug. No one is saying that the purchase of avionics needs to be done any too early. That is a lot of money $$$, but the choice should drive the choice of antenna. The choice of antenna should drive the location and then the method of attachment. The distance from the mount to the avionics is also important and the best performing wire (both coax and AWG22 power and ground) chosen. Few are even talking about horizontal and vertical polarity. Or ½ wave, 5/8 wave and associated wind load. I know Sausen said it didn’t amount to much but then we just replaced all the antennae that got snapped off recently.
Seems some of the flying veterans should weigh in on how early during the kit completion the antenna mount technique could be (should be) resolved. I am seeing a lot of builds which delays this important choice late into the canopy installation. I remember just one builder presented a spreadsheet/ checkmark matrix as to what, where and why -fairly early on, in his build. Composite canopies can play havoc with those choices. It is humorous that so many VANs builders thing of these as aluminum airplanes. Seems when it comes to antennae, they are more composite in their mount location than most certificated metal aircraft. Make it carbon fiber and its even worse.
Has anyone tried duplicating Archers with copper rather than aluminum (inside the composite wingtip)?
Any takers? Tim’s WSI post got me reflecting… which you all know may not be a good thing. Plus with 1,000 subscribers there are sure a lot of lurkers and I don’t want to lose Michael Sausen’s posts again. Thanks Tim! Maybe some of you can rate your antenna performance and make stronger recommendations to the next 700 builders.
John Cox
#600
W7COX – (Amateur Radio) for those not informed
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rv10(at)sinkrate.com
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| Posted: Sat Sep 15, 2007 2:22 pm Post subject: Antenna placement and adequate ground plane or ground wire t |
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John you’re probably looking more for antenna performance than ease of placement but I thought it relevant to contribute this…
I opted to put both com antenna’s on the belly just aft of the rear spar attach bulkhead (copied from Tim Olson http://www.myrv10.com/N104CD/fuselage/20050522/index.html ). I was crawling all over Van’s personal 10 at the homecoming this year and noticed that he actually mounted his com antenna forward of the rear spar attach bulkhead. The coax connector is then accessible by removing the cover over the flap actuator bar. The significance being the antenna wire is accessible w/o cutting holes after final assembly. I think Tim opted to put his aux batteries in this location. I failed to read ahead in the plans far enough to see this as a viable mounting location.
I cannot attest to performance of either location.
-Ben
#40579 Tailcone Attach
PDX
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of John W. Cox
Sent: Saturday, September 15, 2007 11:14 AM
To: rv10-list(at)matronics.com
Subject: Antenna placement and adequate ground plane or ground wire termination
Much of the consternation in finalizing RV-10 kit completion is the delay in choice of avionics, the choice of antenna, selecting antenna placement, and then final ground strapping/ground plane/ ground wire lug. No one is saying that the purchase of avionics needs to be done any too early. That is a lot of money $$$, but the choice should drive the choice of antenna. The choice of antenna should drive the location and then the method of attachment. The distance from the mount to the avionics is also important and the best performing wire (both coax and AWG22 power and ground) chosen. Few are even talking about horizontal and vertical polarity. Or ½ wave, 5/8 wave and associated wind load. I know Sausen said it didn’t amount to much but then we just replaced all the antennae that got snapped off recently.
Seems some of the flying veterans should weigh in on how early during the kit completion the antenna mount technique could be (should be) resolved. I am seeing a lot of builds which delays this important choice late into the canopy installation. I remember just one builder presented a spreadsheet/ checkmark matrix as to what, where and why -fairly early on, in his build. Composite canopies can play havoc with those choices. It is humorous that so many VANs builders thing of these as aluminum airplanes. Seems when it comes to antennae, they are more composite in their mount location than most certificated metal aircraft. Make it carbon fiber and its even worse.
Has anyone tried duplicating Archers with copper rather than aluminum (inside the composite wingtip)?
Any takers? Tim’s WSI post got me reflecting… which you all know may not be a good thing. Plus with 1,000 subscribers there are sure a lot of lurkers and I don’t want to lose Michael Sausen’s posts again. Thanks Tim! Maybe some of you can rate your antenna performance and make stronger recommendations to the next 700 builders.
John Cox
#600
W7COX – (Amateur Radio) for those not informed | Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234
[quote][b]
| | - 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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