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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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 Posted: Fri May 29, 2009 7:51 am Post subject: Learning through the efforts of others. |
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Here is an AD for certificated GA production aircraft (posted this morning) which could hold a kernal of wisdom on gps antenna mounting for 10 builders.
John Cox
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CE-09-32.pdf |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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| Posted: Fri May 29, 2009 8:18 am Post subject: Learning through the efforts of others. |
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Amen, but that's what I've been saying since day one. If it's
my tablet's GPS antenna, no big deal. But for my 480's WAAS
LPV capable antenna, no....install as directed by the manufacturer.
Tim Olson - RV-10 N104CD
do not archive
John Cox wrote:
| Quote: | Here is an AD for certificated GA production aircraft (posted this
morning) which could hold a kernal of wisdom on gps antenna mounting for
10 builders.
John Cox
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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:
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msausen
Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA
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| Posted: Fri May 29, 2009 9:49 am Post subject: Learning through the efforts of others. |
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I think one thing that is important, but was only alluded to, in that AD is how it was fine with a standard GPS antenna because of the number of satellites that were in motion to provide coverage. Now the problem is twofold, the GAO is predicting a degradation in coverage because they will not be replacing satellites before they start to have failures and the second problem is that there is only two Geostationary satellites providing WAAS which is much more susceptible to shadowing.
Michael
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wwc4(at)njit.edu
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| Posted: Fri May 29, 2009 10:34 am Post subject: Learning through the efforts of others. |
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Good points but note this is NOT an AD, it's not even a Service Bulletin, it's an Information Bulletin (SAIB). The intent is to bring it to pilot's attention but does not rise to the level of safety of flight. It even says that in the second paragraph.
AD's are mandatory for ALL aircraft listed. Service Bulletins are NOT mandatory for Part 91 aircraft and SAIBs are just advisory.
Also, I have an aluminum mesh in my RV-10 fiberglass canopy but I guess, most 10 builders will not have a mesh making the -10 canopy effectively transparent for GPS signals.
http://wcurtis.nerv10.com/90Electrical/antenna.html
William Curtis
http://wcurtis.nerv10.com/
On Fri, May 29, 2009 at 1:49 PM, RV Builder (Michael Sausen) <rvbuilder(at)sausen.net (rvbuilder(at)sausen.net)> wrote:
[quote]--> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net (rvbuilder(at)sausen.net)>
I think one thing that is important, but was only alluded to, in that AD is how it was fine with a standard GPS antenna because of the number of satellites that were in motion to provide coverage. Now the problem is twofold, the GAO is predicting a degradation in coverage because they will not be replacing satellites before they start to have failures and the second problem is that there is only two Geostationary satellites providing WAAS which is much more susceptible to shadowing.
Michael
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dmaib@me.com
Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida
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| Posted: Fri May 29, 2009 12:48 pm Post subject: Learning through the efforts of others. |
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Wise advice indeed, but it does not look like an AD to me. Informational only, I think.
David Maib
40559
"Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."
-Mark Twain
On May 29, 2009, at 11:50 AM, John Cox wrote:
<CE-09-32.pdf>
| | - 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:
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_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL |
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Fri May 29, 2009 7:44 pm Post subject: Learning through the efforts of others. |
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Whether or not an item is an AD has been beaten to death on this list in the distant past. The kernal of wisdom lies with those who have not yet taken the path of installation where the antenna's function might just be degraded at a time which could impact safety in a negative manor. This issue is much like the Emergency Locator Beacons of the 121.5 variety with antenna which could never transmit a signal to save the soles on board.
Let me apologize for the casualness of my email which caused a few to think in terms of narrow Airworthiness Directives. I did not forget that many bask in the Experiment portion of Experimental Amateur Built Kit and go defensive on the use of the work Airworthiness. I received it from the Fed on a daily AD notification subscription. I found value in what Cirrus was doing to make their aircraft safer for their operators. Sorry to waste valuable bandwidth. it was offered as Information Only for the Safe use of RV-10 builders.
John Cox
From: owner-rv10-list-server(at)matronics.com on behalf of David Maib
Sent: Fri 5/29/2009 1:47 PM
To: rv10-list(at)matronics.com
Subject: Re: Learning through the efforts of others.
Wise advice indeed, but it does not look like an AD to me. Informational only, I think.
David Maib
40559
"Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."
-Mark Twain
On May 29, 2009, at 11:50 AM, John Cox wrote:
<CE-09-32.pdf>
[quote][b]
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pilotdds(at)aol.com
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| Posted: Sat May 30, 2009 5:43 am Post subject: Learning through the efforts of others. |
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I can't resist throwing my two cents in.In my location as in many others lpv approaches are popping up everywhere and they are amazing,routinely taking us to within 300ft agl through ground fog ang marine layers.I have enough to worry about in these situations and appreciate the best antenna location possible.Thanks for sharing I will be relocating my antennas
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