---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 10/07/20: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:18 PM - Peer review, Z16 Rotax engine, Ducati Regulator (velletazjp) 2. 01:36 PM - Re: Peer review, Z16 Rotax engine, Ducati Regulator (Robert L. Nuckolls, III) 3. 06:56 PM - Re: Peer review, Z16 Rotax engine, Ducati Regulator (user9253) 4. 08:17 PM - Breaker then pump failure (David Saylor) 5. 08:20 PM - Engine Monitor P-lead question (farmrjohn) ________________________________ Message 1 _____________________________________ Time: 12:18:01 PM PST US Subject: AeroElectric-List: Peer review, Z16 Rotax engine, Ducati Regulator From: "velletazjp" Hi everybody Many thanks for all the help I received when I designed the electric system for my Jodel's friend. The plane is now airworthy and so far everything is working like a charm. I now start helping an other fellow aviator who'w building an Aero101. He is a professional carpenter and the airplane is a true beauty but electicity is not he's strong skill. I designed a very simple electric system, 90% inspired by bob's Z16. Once again Bob [and all the other members of this forum], thanks for all the knowledge you're spreading... My friend had 2 requirement that forced me to differ from Bob's design : - he doesn't want to use a battery relay (I personally don't neither the load on the bus is less than 5Amp and a simple switch can handle that kind of current) - he bought a rather expensive start key (see installation manual attached) that permits to turn ON the battery, select Ignition 1 and/or 2, and activate the stater. He don't want any other switches (unless safety mandates). Initially, the supplier doesn't advised to install a OV disconnect relay, but I used Bob's design to adapt one on his airplane. Please let me know if you see any flaws or improvement possible. Many thanks -------- 2020 contribution paid Read this topic online here: http://forums.matronics.com/viewtopic.php?p=498689#498689 Attachments: http://forums.matronics.com//files/loraviacom_regulateur_912_ducati_395.pdf http://forums.matronics.com//files/schema_electrique_objet_176.pdf http://forums.matronics.com//files/120883263_336407514294840_7206115166821084811_n_649.jpg ________________________________ Message 2 _____________________________________ Time: 01:36:05 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Peer review, Z16 Rotax engine, Ducati Regulator > >Initially, the supplier doesn't advised to install a OV disconnect >relay, but I used Bob's design to adapt one on his airplane. > > >Please let me know if you see any flaws or improvement possible. The crowbar ov module wires ACROSS the alternator disconnect relay DOWNSTREAM of the 5A breaker. See figure Z16. Bob . . . ________________________________ Message 3 _____________________________________ Time: 06:56:54 PM PST US Subject: AeroElectric-List: Re: Peer review, Z16 Rotax engine, Ducati Regulator From: "user9253" The crowbar module will short out the battery. There is a long, always-hot wire connected between the battery and terminal 1 of that expensive switch. In an accident, that wire could make sparks and start a fire. A battery contactor can shut off power close to the battery. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=498692#498692 ________________________________ Message 4 _____________________________________ Time: 08:17:11 PM PST US From: David Saylor Subject: AeroElectric-List: Breaker then pump failure I just had the Tyco switch/breaker for my boost pump fail. It made a bad smell, then became intermittent, then failed completely in the span of a few minutes. I replaced it with the same make and model. 2.5 flight hours later my boost pump failed. The new breaker never tripped. The pump just stopped running. The pump circuit has no resistance and I get full bus voltage at the pump, even with the pump still connected. So it's open inside. The new switch is working fine. The pump is from Airflow Performance. They're common in RVs. The pump and the switch had almost 2000 airframe hours since installed. I use it for take-off and landing, so the powered time is a fraction of the total time. The airplane had been sitting for almost a year, then flown about 15 hours in the last two weeks. Does anyone have an understanding of any relationship between these two failures? They seem too similar to be completely unrelated. My guess is that a faulty pump somehow overloaded a faulty breaker, then failed completely. I couldn't say that I noticed any particular fuel pressure issues before the failure. Everything was in the green. Thoughts? ________________________________ Message 5 _____________________________________ Time: 08:20:22 PM PST US Subject: AeroElectric-List: Engine Monitor P-lead question From: "farmrjohn" I'm installing an Electronics International CGR-30P engine monitor. For the tach function they have two leads that connect to the left and right P-lead on the ignition switch which are not shielded. The P-leads from the mags to the switch are shielded. Will this be an issue? Can those two leads be included in a wire bundle or should they have their on run away from other wires? Thanks, John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=498693#498693 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.