RV10-List Digest Archive

Tue 08/28/12


Total Messages Posted: 18



Today's Message Index:
----------------------
 
     1. 05:20 AM - Re: Differential Pressure Test - Results Question (jkreidler)
     2. 05:44 AM - Re: RV10-List Digest: 2 Msgs - 08/27/12 (Tim)
     3. 09:43 AM - ELT Antenna (Kelly McMullen)
     4. 09:49 AM - Re: ELT Antenna (Seano)
     5. 09:52 AM - Re: ELT Antenna (Rene Felker)
     6. 09:54 AM - Re: ELT Antenna (Jesse Saint)
     7. 09:56 AM - Re: ELT Antenna (Seano)
     8. 09:59 AM - Re: ELT Antenna (Marcus Cooper)
     9. 10:03 AM - Re: ELT Antenna (Rob Kochman)
    10. 11:06 AM - Re: ELT Antenna (Carl Froehlich)
    11. 11:53 AM - Re: ELT Antenna (John Cox)
    12. 04:20 PM - Re: Differential Pressure Test - Results Question (Barry)
    13. 05:30 PM - High altitude performance (Jesse Saint)
    14. 05:48 PM - Re: High altitude performance (Rob Kermanj)
    15. 05:53 PM - Re: ELT Antenna (bob-tcw)
    16. 06:13 PM - Re: Re: Differential Pressure Test - Results Question (Robin Marks)
    17. 07:02 PM - Re: ELT Antenna (Pascal)
    18. 11:56 PM - Re: ELT Antenna (Bob Turner)
 
 
 


Message 1


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    Time: 05:20:29 AM PST US
    Subject: Re: Differential Pressure Test - Results Question
    From: "jkreidler" <jason.kreidler@regalbeloit.com>
    Barry, thanks for the information. I have read your article, great write-up, thanks! I was wondering if the volume of the plenum could ever get too large? Thanks, Jason -------- Jason Kreidler 4 Partner Build - Sheboygan Falls, WI Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler N44YH - Flying - #40617 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=381980#381980


    Message 2


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    Time: 05:44:51 AM PST US
    Subject: Re: RV10-List Digest: 2 Msgs - 08/27/12
    From: Tim <timrandlerv10@yahoo.com>
    Any builders between Birmingham-Chattanooga-Clarksville? On Aug 28, 2012, at 2:01 AM, RV10-List Digest Server <rv10-list@matronics.com> wrote: > * > > ================================================= > Online Versions of Today's List Digest Archive > ================================================= > > Today's complete RV10-List Digest can also be found in either of the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the RV10-List Digest and can be viewed with a generic text editor > such as Notepad or with a web browser. > > HTML Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 12-08-27&Archive=RV10 > > Text Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 12-08-27&Archive=RV10 > > > =============================================== > EMail Version of Today's List Digest Archive > =============================================== > > > ---------------------------------------------------------- > RV10-List Digest Archive > --- > Total Messages Posted Mon 08/27/12: 2 > ---------------------------------------------------------- > > > Today's Message Index: > ---------------------- > > 1. 07:40 AM - Re: Differential Pressure Test - Results Question (Barry) > 2. 05:23 PM - Plane-Power Alternator use (Rob Kermanj) > > > > ________________________________ Message 1 _____________________________________ > > > Time: 07:40:41 AM PST US > Subject: RV10-List: Re: Differential Pressure Test - Results Question > From: "Barry" <blalmarz@embarqmail.com> > > > I too have the SJ cowl and pleneum, and have had the same cooling problems. I now > can climb and keep oil temps +/- 210F and CHT's under 400F when it's hot OAT. > In cruise I run LOP -50F or ROP 150F and the oil is 195-205F and CHT 385-395F > on #5 or #6; the rest of the CHT's are lower. These are the mods I have done > in order: > 1. Installed 4 louvers, 2 on bottom, 2 on side of cowl like a C-182 > 2. Cut the exit area of the cowl so it opened it up at the rear about 1 1/2" > 3. Installed a new pleneum from Sam that is more wedge shaped ( higher in the rear) > which gives more volume for incoming air > 4. Installed the larger rings > I have done speed checks with two other stock RV-10's at the same power settings > and our speeds were pretty much the same. > I plan on putting some air dams in front of #1&2 cyl to see if I can get #5&6 > CHT's down a little > My wife, Amy Laboda, did a write up in Kitplanes a while back on the process, so > check those out. Give me a call if ya have any questions 239-567-2271. Blue > Skys Barry > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=381923#381923 > > > ________________________________ Message 2 _____________________________________ > > > Time: 05:23:13 PM PST US > From: Rob Kermanj <flysrv10@gmail.com> > Subject: RV10-List: Plane-Power Alternator use > > Hello All, > > Anyone using PP 30 Amp accessory mount alternator as a primary? > > If so, any comments? > > Thanks, > RobK > > do not archive > > Begin forwarded message: > >> From: "Dick Carmichael" <stc@planepower.com> >> Subject: Plane-Power >> Date: August 27, 2012 10:09:18 AM EDT >> To: <FlysRV10@gmail.com> >> >> Rob: >> >> See attached. The FS1-14 and FS1-14B are the same size. Only the > internal regulator is diifferent. (13.6v vs 14.3v) >> >> Dick > > > > > > > > >


    Message 3


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    Time: 09:43:27 AM PST US
    Subject: ELT Antenna
    From: Kelly McMullen <apilot2@gmail.com>
    I am looking at installing my ACK E-04 antenna under the tail intersection fiberglass fairing. I've read through a good discussion on the AeroElectric list and feel the trade-off of horizontal polarization, vs protection from impact and eliminating the drag is worth it. I know that Mooney got approval for similar antenna instal for a 406 antenna in fiberglass ventral fin. My question is if anyone has done this and gotten any grief from their DAR. My only concern is to fully meet the TSO on the ELT you are supposed to comply with the install instructions, that call for vertical mounting withing 30 degrees. Kelly 40866 forever finishing


    Message 4


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    Time: 09:49:40 AM PST US
    From: "Seano" <sean@braunandco.com>
    Subject: Re: ELT Antenna
    Kelly, I mounted mine horizontally under the tailcone fairing with no problems from the DAR. I later converted mine to 406 and accidentally set it off. The airforce called me within 5 minutes so I knew it worked well even in the hangar with the door closed. I wouldn't recommend testing it this way :) ----- Original Message ----- From: "Kelly McMullen" <apilot2@gmail.com> Sent: Tuesday, August 28, 2012 10:42 AM Subject: RV10-List: ELT Antenna > > I am looking at installing my ACK E-04 antenna under the tail > intersection fiberglass fairing. I've read through a good discussion > on the AeroElectric list and feel the trade-off of horizontal > polarization, vs protection from impact and eliminating the drag is > worth it. I know that Mooney got approval for similar antenna instal > for a 406 antenna in fiberglass ventral fin. > My question is if anyone has done this and gotten any grief from their > DAR. My only concern is to fully meet the TSO on the ELT you are > supposed to comply with the install instructions, that call for > vertical mounting withing 30 degrees. > Kelly > 40866 > forever finishing > > >


    Message 5


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    Time: 09:52:00 AM PST US
    From: "Rene Felker" <rene@felker.com>
    Subject: ELT Antenna
    That is how I did it. My DAR did not comment. After the crash, which way will the antenna be pointing? Rene' Felker N423CF 801-721-6080 -----Original Message----- From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Kelly McMullen Sent: Tuesday, August 28, 2012 10:43 AM Subject: RV10-List: ELT Antenna I am looking at installing my ACK E-04 antenna under the tail intersection fiberglass fairing. I've read through a good discussion on the AeroElectric list and feel the trade-off of horizontal polarization, vs protection from impact and eliminating the drag is worth it. I know that Mooney got approval for similar antenna instal for a 406 antenna in fiberglass ventral fin. My question is if anyone has done this and gotten any grief from their DAR. My only concern is to fully meet the TSO on the ELT you are supposed to comply with the install instructions, that call for vertical mounting withing 30 degrees. Kelly 40866 forever finishing


    Message 6


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    Time: 09:54:45 AM PST US
    Subject: Re: ELT Antenna
    From: Jesse Saint <jesse@saintaviation.com>
    I've done it and haven't gotten any grief from a DAR. On Aug 28, 2012, at 12:42 PM, Kelly McMullen <apilot2@gmail.com> wrote: > > I am looking at installing my ACK E-04 antenna under the tail > intersection fiberglass fairing. I've read through a good discussion > on the AeroElectric list and feel the trade-off of horizontal > polarization, vs protection from impact and eliminating the drag is > worth it. I know that Mooney got approval for similar antenna instal > for a 406 antenna in fiberglass ventral fin. > My question is if anyone has done this and gotten any grief from their > DAR. My only concern is to fully meet the TSO on the ELT you are > supposed to comply with the install instructions, that call for > vertical mounting withing 30 degrees. > Kelly > 40866 > forever finishing > > > >


    Message 7


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    Time: 09:56:18 AM PST US
    Subject: Re: ELT Antenna
    From: Seano <sean@braunandco.com>
    Ya. Plus in my checklist I state to make sure you crash within 30 degrees of vertical so they can find your body. Sent from my iPhone On Aug 28, 2012, at 12:48, "Rene Felker" <rene@felker.com> wrote: > > That is how I did it. My DAR did not comment. > > After the crash, which way will the antenna be pointing? > > Rene' Felker > N423CF > 801-721-6080 > > -----Original Message----- > From: owner-rv10-list-server@matronics.com > [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Kelly McMullen > Sent: Tuesday, August 28, 2012 10:43 AM > To: rv10-list@matronics.com > Subject: RV10-List: ELT Antenna > > > I am looking at installing my ACK E-04 antenna under the tail intersection > fiberglass fairing. I've read through a good discussion on the AeroElectric > list and feel the trade-off of horizontal polarization, vs protection from > impact and eliminating the drag is worth it. I know that Mooney got > approval for similar antenna instal for a 406 antenna in fiberglass ventral > fin. > My question is if anyone has done this and gotten any grief from their DAR. > My only concern is to fully meet the TSO on the ELT you are supposed to > comply with the install instructions, that call for vertical mounting > withing 30 degrees. > Kelly > 40866 > forever finishing > > > > > > > >


    Message 8


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    Time: 09:59:40 AM PST US
    Subject: Re: ELT Antenna
    From: Marcus Cooper <coop85@verizon.net>
    Kelly, That's exactly what I did and received no grief whatsoever from the DAR. Marcus On Aug 28, 2012, at 12:42 PM, Kelly McMullen <apilot2@gmail.com> wrote: I am looking at installing my ACK E-04 antenna under the tail intersection fiberglass fairing. I've read through a good discussion on the AeroElectric list and feel the trade-off of horizontal polarization, vs protection from impact and eliminating the drag is worth it. I know that Mooney got approval for similar antenna instal for a 406 antenna in fiberglass ventral fin. My question is if anyone has done this and gotten any grief from their DAR. My only concern is to fully meet the TSO on the ELT you are supposed to comply with the install instructions, that call for vertical mounting withing 30 degrees. Kelly 40866 forever finishing


    Message 9


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    Time: 10:03:07 AM PST US
    Subject: Re: ELT Antenna
    From: Rob Kochman <rv10rob@gmail.com>
    I installed my 406 ELT on top of the tail cone, to ensure it has a good ground plane and view of the sky. I really regret it. It looks dumb and is draggy. By all accounts, they work great under the tail fairing, and for me flying most trips IFR and using a SPOT mitigates the risk even further. -Rob On Tue, Aug 28, 2012 at 9:56 AM, Seano <sean@braunandco.com> wrote: > > Ya. Plus in my checklist I state to make sure you crash within 30 degrees > of vertical so they can find your body. > > Sent from my iPhone > > On Aug 28, 2012, at 12:48, "Rene Felker" <rene@felker.com> wrote: > > > > > That is how I did it. My DAR did not comment. > > > > After the crash, which way will the antenna be pointing? > > > > Rene' Felker > > N423CF > > 801-721-6080 > > > > -----Original Message----- > > From: owner-rv10-list-server@matronics.com > > [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Kelly > McMullen > > Sent: Tuesday, August 28, 2012 10:43 AM > > To: rv10-list@matronics.com > > Subject: RV10-List: ELT Antenna > > > > > > I am looking at installing my ACK E-04 antenna under the tail > intersection > > fiberglass fairing. I've read through a good discussion on the > AeroElectric > > list and feel the trade-off of horizontal polarization, vs protection > from > > impact and eliminating the drag is worth it. I know that Mooney got > > approval for similar antenna instal for a 406 antenna in fiberglass > ventral > > fin. > > My question is if anyone has done this and gotten any grief from their > DAR. > > My only concern is to fully meet the TSO on the ELT you are supposed to > > comply with the install instructions, that call for vertical mounting > > withing 30 degrees. > > Kelly > > 40866 > > forever finishing > > > > > > > > > > > > > > > > > > -- Rob Kochman RV-10 Flying since March 2011 Woodinville, WA http://kochman.net/N819K


    Message 10


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    Time: 11:06:50 AM PST US
    From: Carl Froehlich <carl.froehlich@verizon.net>
    Subject: Re: ELT Antenna
    That is how I have the antenna mounted in both the 8A and the 10. The local FSDO did sign offs on both planes and did not mention the mount for either one. Carl On Aug 28, 2012, at 12:53 PM, Jesse Saint <jesse@saintaviation.com> wrote: > > I've done it and haven't gotten any grief from a DAR. > > On Aug 28, 2012, at 12:42 PM, Kelly McMullen <apilot2@gmail.com> wrote: > >> >> I am looking at installing my ACK E-04 antenna under the tail >> intersection fiberglass fairing. I've read through a good discussion >> on the AeroElectric list and feel the trade-off of horizontal >> polarization, vs protection from impact and eliminating the drag is >> worth it. I know that Mooney got approval for similar antenna instal >> for a 406 antenna in fiberglass ventral fin. >> My question is if anyone has done this and gotten any grief from their >> DAR. My only concern is to fully meet the TSO on the ELT you are >> supposed to comply with the install instructions, that call for >> vertical mounting withing 30 degrees. >> Kelly >> 40866 >> forever finishing >> >> >> >> > > > > >


    Message 11


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    Time: 11:53:58 AM PST US
    Subject: Re: ELT Antenna
    From: John Cox <rv10pro@gmail.com>
    Use an IFR-4000-Opt 1 and see if the 406 emits the squitter discrete data from your concealed antenna. It will also allow you to determine how many Db loss the idea cost. We have the elt mounted with horizontal ground plane and 1/3 of the antennae concealed. It is a quarter wave for 121.5. Cosmetics goes out the window when you are inverted in the snow in February. The drag coefficient has always been a none issue. John On Aug 28, 2012 9:46 AM, "Kelly McMullen" <apilot2@gmail.com> wrote: > > I am looking at installing my ACK E-04 antenna under the tail > intersection fiberglass fairing. I've read through a good discussion > on the AeroElectric list and feel the trade-off of horizontal > polarization, vs protection from impact and eliminating the drag is > worth it. I know that Mooney got approval for similar antenna instal > for a 406 antenna in fiberglass ventral fin. > My question is if anyone has done this and gotten any grief from their > DAR. My only concern is to fully meet the TSO on the ELT you are > supposed to comply with the install instructions, that call for > vertical mounting withing 30 degrees. > Kelly > 40866 > forever finishing > >


    Message 12


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    Time: 04:20:35 PM PST US
    Subject: Re: Differential Pressure Test - Results Question
    From: "Barry" <blalmarz@embarqmail.com>
    Hi Jason; I think Sam's thinking for the larger volume plenum was to reduce the internal pressure and speed the air at the inlets to get good flow into the plenum. We were thinking with the lower volume plenum it could create back pressure and create a restriction for the inlet air and cause it to spill out around the rings. Sorry no real engineering data just trial and error. It has seemed to help and I'm sure there is a point where too much volume ie. lower pressure, is not optimal, but again no hard data. Good luck Barry Read this topic online here: http://forums.matronics.com/viewtopic.php?p=382027#382027


    Message 13


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    Time: 05:30:35 PM PST US
    Subject: High altitude performance
    From: Jesse Saint <jesse@saintaviation.com>
    I have a guy asking me how an RV-10 would perform in Mexico at 5,000 ft msl on a 2,000 ft strip. Any opinions of how much weight it could operate with at this altitude on a short strip in a warm climate? Thanks. Jesse Saint I-TEC, Inc. jesse@itecusa.org www.itecusa.org www.mavericklsa.com C: 352-427-0285 O: 352-465-4545 F: 815-377-3694 Sent from my iPhone


    Message 14


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    Time: 05:48:16 PM PST US
    Subject: Re: High altitude performance
    From: Rob Kermanj <flysrv10@gmail.com>
    I tested mine in Bryce Canyon airport (alt 7600 ft) on a summer day but not terribly hot, four people, full fuel, many bags, mid day and I used about 1/2 of the 7500 long runway. do not archive. On Aug 28, 2012, at 8:29 PM, Jesse Saint wrote: > > I have a guy asking me how an RV-10 would perform in Mexico at 5,000 ft msl on a 2,000 ft strip. Any opinions of how much weight it could operate with at this altitude on a short strip in a warm climate? > > Thanks. > > Jesse Saint > I-TEC, Inc. > jesse@itecusa.org > www.itecusa.org > www.mavericklsa.com > C: 352-427-0285 > O: 352-465-4545 > F: 815-377-3694 > > Sent from my iPhone > > > >


    Message 15


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    Time: 05:53:01 PM PST US
    From: "bob-tcw" <rnewman@tcwtech.com>
    Subject: Re: ELT Antenna
    All of you that have not had an issue with your DAR inspection count yourself as lucky. My DAR had this issue of the ELT antenna being absolutely installed per the TSO for which the ELT was certified up front on his list of things that were deal breakers for him. This is the only antenna hole I had to drill through the top of my airplane, I was not pleased. The only good news for me was that he was upfront about the antenna issue and I had a month or so to prepare myself for drilling the hole. good luck with your elt install, your experience will vary with the DAR available to you! Bob Newman N541RV www.tcwtech.com


    Message 16


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    Time: 06:13:38 PM PST US
    From: Robin Marks <robin@PaintTheWeb.com>
    Subject: Re: Differential Pressure Test - Results Question
    Based on research we did at the time our understanding of an "ideal" plenum shape would be an ever increasing volume as the air moves aft. To that effect we took the ill-performing James plenum and hacked the fiberglass off both upper sides above the cylinder heads. In place of the fiberglass we mated a metal plenum of ever increasing volume with the end result being a plenum with ~50% more volume (WAG). The net effect of this change was ZERO. Not really any discernible difference other than I now had a Franken-plenum. It was ugly but it was symmetrical and just about as clean to the airflow as the original plenum. I truly expected to see some difference good or bad. But no difference. This is the same plenum I fly today. Literally today. I am willing to place a few dollars that an even tighter plenum in this situation will NOT aid in cooling. In all cowl configurations some air to a significant amount of inlet air actually reverses itself and goes out the inlets. This is part of the dirtiness of the front end of your aircraft. Minimizing the amount backtracking out will help performance. The racers have extra small inlets for max speed but minimum engine lifespan. Striking a balance is the goal. Again the simplest answer is the standard vans cowl & baffle. My next attempt will be larger inlets (new cowl) and a baffle system. Robin -----Original Message----- From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Barry Sent: Tuesday, August 28, 2012 4:20 PM Subject: RV10-List: Re: Differential Pressure Test - Results Question Hi Jason; I think Sam's thinking for the larger volume plenum was to reduce the internal pressure and speed the air at the inlets to get good flow into the plenum. We were thinking with the lower volume plenum it could create back pressure and create a restriction for the inlet air and cause it to spill out around the rings. Sorry no real engineering data just trial and error. It has seemed to help and I'm sure there is a point where too much volume i.e. lower pressure, is not optimal, but again no hard data. Good luck Barry Read this topic online here: http://forums.matronics.com/viewtopic.php?p=382027#382027


    Message 17


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    Time: 07:02:10 PM PST US
    From: "Pascal" <rv10flyer@verizon.net>
    Subject: Re: ELT Antenna
    DAR are basically FAA designated representatives. I had to spend 3 hours at a FSDO with 7 different FAA examiners drilling me for my repairman=99s certificate. Another builder got his after a 15 minute discussion with his FSDO and his explaining the pictures, difference is he went to a FSDO that understood experimental aircraft, I went to my FSDO in a area where they don=99t see too many experimentals so they don=99t understand the rules and requirements without studying the regs.. My point is my DAR has a RV has been a DAR for 21 years and knew the rules for =9Cexperimental=9D aircraft, he recommended I put the antenna where mine is, under the fiberglass fairing below the VS, he told me a whole lot because he knew what the rules were but he also knew what is was like to fly a RV. I wasn=99t lucky, I was fortunate. Get a Technical Councelor, get one that knows RV and who knows who the best DAR is for you. Having to drill a hole is ridiculous, I would have found another DAR if I was told this was my only option, if that 2nd opinion DAR told me to do it, than I would. I can=99t tell you how many =9Chighly educated=9D people told me I needed to do something, I tested the idea off of another builder who almost laughed at my questions, in the end he was right I didn=99t need to drill holes in places to do the job right. From: bob-tcw Sent: Tuesday, August 28, 2012 5:52 PM Subject: Re: RV10-List: ELT Antenna All of you that have not had an issue with your DAR inspection count yourself as lucky. My DAR had this issue of the ELT antenna being absolutely installed per the TSO for which the ELT was certified up front on his list of things that were deal breakers for him. This is the only antenna hole I had to drill through the top of my airplane, I was not pleased. The only good news for me was that he was upfront about the antenna issue and I had a month or so to prepare myself for drilling the hole. good luck with your elt install, your experience will vary with the DAR available to you! Bob Newman N541RV www.tcwtech.com


    Message 18


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    Time: 11:56:29 PM PST US
    Subject: Re: ELT Antenna
    From: "Bob Turner" <bobturner@alum.rpi.edu>
    Anyone mount their antenna to the baggage area bulkhead, with the antenna running just below the baggage area fiberglass ceiling? -------- Bob Turner RV-10 QB Read this topic online here: http://forums.matronics.com/viewtopic.php?p=382041#382041




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