---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Fri 10/02/09: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:29 AM - Fuel leak .. thanks for the help (james dankovich) 2. 06:43 AM - Re: Washer usage (Klaus Truemper) 3. 06:54 AM - Fw: Washer usage (Jim Belcher) 4. 07:15 AM - Re: Re: Washer usage (Jim Belcher) 5. 12:06 PM - RAC Position Sensor for Flaps (Gig Giacona) 6. 02:02 PM - Re: RAC Position Sensor for Flaps (george may) 7. 02:25 PM - Re: RAC Position Sensor for Flaps (Craig Payne) 8. 08:47 PM - Re: RAC Position Sensor for Flaps (Sabrina) 9. 09:23 PM - Re: Washer usage (Carlos Sa) ________________________________ Message 1 _____________________________________ Time: 04:29:52 AM PST US From: james dankovich Subject: Zenith-List: Fuel leak .. thanks for the help The fuel leak appears to be solved.. the hose was deteriorated.-Drilled i nspection plates.- Found cracks in the hose.it was -soft and a definite leakage was present.- - Now have had all fuel hose replaced.- Hopefully, life will soon be back t o great.. once we have started the engine with full tanks we will know if t he total problem is solved. - - Thanks, Ron and all who helped .-- - -Blue skies ! - (Oh, how I wish .. here in Michigan today, not so likely....) ________________________________ Message 2 _____________________________________ Time: 06:43:35 AM PST US From: Klaus Truemper Subject: Zenith-List: Re: Washer usage Hi Ken, The general rule is that a washer must be used on both sides. The reason is not just to prevent the head or nut from damaging the surface during the tightening, but also to prevent dangerous corrosion. The cadmium plating of the washers is attacked by any corrosion first and thus prevents corrosion at the head or nut, where corrosion would be dangerous. Happy flying, Klaus ________________________________ Message 3 _____________________________________ Time: 06:54:00 AM PST US From: Jim Belcher Subject: Fwd: Zenith-List: Washer usage There are no enforcable rules as such. As someone pointed out, AC43-13 has the guidance for washer usage. This advisory circular (technically, not a rule) applies to type certificated aircraft. If your aircraft is licensed as an experimental, then the methods described there are usually wise to use on your aircraft, but not mandatory. They are simply good practice. For whatever it's worth, I pretty much follow AC43-13 on my experimental. I have never seen anything in a FAR address washer usage, but that's not to say it may not exist somewhere. ---------- Forwarded Message ---------- Subject: Zenith-List: Washer usage From: "Ken" What are the rules regarding usage of flat washers on the AN bolts? I assume you must have one under the nut so you don't scuff the metal it is tightening against (when you tighten it)? How about the other end, is it necessary or even required by FARs? How about on the rudder pedal where you have a bolt going through a clevis that attaches the cable? Is a washer under the castle nut enough or do you need one under the head as well? Thanks in advance. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=265940#265940 ------------------------------------------------------- -- ============================================ Do not archive. ============================================ Jim B Belcher BS, MS Physics, Math, Computer Science A&P/IA Retired aerospace technical manager Mathematics and alcohol do not mix. Do not drink and derive. ============================================ ________________________________ Message 4 _____________________________________ Time: 07:15:38 AM PST US From: Jim Belcher Subject: Re: Zenith-List: Re: Washer usage On Friday 02 October 2009 08:37, Klaus Truemper wrote: > > Hi Ken, > > The general rule is that a washer must be used on both sides. The reason > is not just to prevent the head or nut from damaging the surface > during the tightening, but also to prevent dangerous corrosion. > The cadmium plating of the washers is > attacked by any corrosion first and thus prevents corrosion at the head > or nut, where corrosion would be dangerous. > > Happy flying, > > Klaus A delimma I've found is that Zenith doesn't always supply, or call out, bolts that allow the use of two washers. I've also found that some of their photos and drawings do not show the use of washers. I think this is a mistake, and that Klaus is correct: it is very desirable that there be a washer under both the head of the bolt, and under the nut. Another rule of thumb I see ignored in the parts supplied, the drawings, and the photos is the number of threads showing beyond the end of the nut. I think I recall AC 43-13 requiring a minimum of one thread showing, and a maximum of three. Of course, additional washers, up to a maximum of three, or a maximum 1/8", may be added to achieve this. I again emphasize that AC43-13 does not apply to experiemental aircraft, but that's a good guideline. You sure don't want installed bolts that don't have less than a thread showing beyond the nut. -- ============================================ Do not archive. ============================================ Jim B Belcher BS, MS Physics, Math, Computer Science A&P/IA Retired aerospace technical manager Mathematics and alcohol do not mix. Do not drink and derive. ============================================ ________________________________ Message 5 _____________________________________ Time: 12:06:58 PM PST US Subject: Zenith-List: RAC Position Sensor for Flaps From: "Gig Giacona" I'm using a RAC POS-12 to send flap position to a Dynon 180. Has anyone else installed one of these? I'm trying to figure out a spot to mount it? -------- W.R. "Gig" Giacona 601XL Under Construction See my progress at www.peoamerica.net/N601WR Read this topic online here: http://forums.matronics.com/viewtopic.php?p=266104#266104 ________________________________ Message 6 _____________________________________ Time: 02:02:40 PM PST US From: george may Subject: RE: Zenith-List: RAC Position Sensor for Flaps Gig-- I mounted mine just behind the control arm of the flaps. I formed a piece of aluminum that is riveted to the floor and has a slope on it such that t he control rod with clevises (from Radio Control Model shop) is mounted in a straight line from the sensor to the upper part of the flap control arm. You will need to find the sweet spot that will give you the complete range you are looking for. good luck George May 601XL 912s > Subject: Zenith-List: RAC Position Sensor for Flaps > From: wrgiacona@gmail.com > Date: Fri=2C 2 Oct 2009 12:05:39 -0700 > To: zenith-list@matronics.com > > > I'm using a RAC POS-12 to send flap position to a Dynon 180. > > Has anyone else installed one of these? I'm trying to figure out a spot t o mount it? > > -------- > W.R. "=3BGig"=3B Giacona > 601XL Under Construction > See my progress at www.peoamerica.net/N601WR > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=266104#266104 > > > > > > > =========== =========== =========== =========== > > > =0A _________________________________________________________________=0A Hotmail: Powerful Free email with security by Microsoft.=0A ________________________________ Message 7 _____________________________________ Time: 02:25:49 PM PST US From: "Craig Payne" Subject: RE: Zenith-List: RAC Position Sensor for Flaps Attached are pictures of Mike Sigman's and Ron Geese's installations. -- Craig -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Gig Giacona Sent: Friday, October 02, 2009 1:06 PM Subject: Zenith-List: RAC Position Sensor for Flaps I'm using a RAC POS-12 to send flap position to a Dynon 180. Has anyone else installed one of these? I'm trying to figure out a spot to mount it? -------- W.R. "Gig" Giacona 601XL Under Construction See my progress at www.peoamerica.net/N601WR Read this topic online here: http://forums.matronics.com/viewtopic.php?p=266104#266104 ________________________________ Message 8 _____________________________________ Time: 08:47:28 PM PST US Subject: Zenith-List: Re: RAC Position Sensor for Flaps From: "Sabrina" Gig, I drilled a 3/16" hole in the flap tube, placed a 'Drilled AN3' bolt along with three thin AN364 nuts (one to secure the bolt, two to secure a push/pull wire between the bolt and the RAC POS) and thin washers. I had to try a couple different length AN bolts to get the correct geometry (Still looking for a photo for you.) I mounted the RAC POS on a simple tray that mounts to a simple L angle shown below... Read this topic online here: http://forums.matronics.com/viewtopic.php?p=266200#266200 Attachments: http://forums.matronics.com//files/rac_166.jpg ________________________________ Message 9 _____________________________________ Time: 09:23:53 PM PST US Subject: Re: Zenith-List: Washer usage From: Carlos Sa There is a good summarized Standard document in the ZAC web site. I don't know if it is still pointed to by any ZAC web page. If it is, I could not find it. But I do have the direct link to the document: http://www.zenithair.com/pdf-doc/zenair construction standards draft 1-07.pdf It does not replace AC43-13, but it is a pretty useful summary. I believe it is also provided in the CDs that ship with the kit. Carlos 2009/10/1 Ken > > What are the rules regarding usage of flat washers on the AN bolts? I > assume you must have one under the nut so you don't scuff the metal it is > tightening against (when you tighten it)? How about the other end, is it > necessary or even required by FARs? > > How about on the rudder pedal where you have a bolt going through a clevis > that attaches the cable? Is a washer under the castle nut enough or do you > need one under the head as well? > > Thanks in advance. > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith-list Browse Digests http://www.matronics.com/digest/zenith-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.