---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 12/26/23: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:05 PM - Beginnings of my Tailwind Electrical System (Gerry van Dyk) 2. 04:09 PM - Re: Beginnings of my Tailwind Electrical System (M Wilson) 3. 07:17 PM - Re: Beginnings of my Tailwind Electrical System (Charlie England) ________________________________ Message 1 _____________________________________ Time: 02:05:36 PM PST US From: "Gerry van Dyk" Subject: AeroElectric-List: Beginnings of my Tailwind Electrical System Hello all I'm deep in thought working on the power distribution for my Tailwind Project. I'm working towards a Z13/8 implementation, the Z101 extras don't hold much appeal or utility for me. I hope some of you learned gents could give my proposed system a quick look. It's pretty basic so far. I'm not ready to offer my basic bus power distribution drawing or load analysis just yet. But I'd like to ask a question or two as I'm wrapping my head around all the issues. I note on all the Z drawings the wire from the battery contactor to the main bus is not fused. Is this similar to the starter cables, in that it's a fat wire that is unlikely to be compromised? On the Z13/8 drawing I see a double pole single throw switch is used to bring up the main alternator (Plane Power AS 12-E160 in my case) and the battery contactor / main bus. I'm considering using another DPST switch to bring up the SD-8 and the alt E-bus feed. Is there any condition where I would want one or the other of those to be switched off? My current thought is to run the ignition start power for the pair of P-Mags from the endurance bus. To start the engine I'd turn on the endurance bus, the low voltage warning should come up as the battery will be at rest. After starting the engine, the EFIS ammeter should show the SD-8 supplying power. Bringing up the main bus I'd then switch off the alt E-bus feed / SD-8 to run on the main alternator. That should satisfy preflight testing of the backup systems would it not? I'd appreciate any insights that I'm sure I'm missing so far. I've attached a basic sketch of my proposed bus power distrubution drawing, and load analysis. If any of you have thoughts or questions please offer them. With any changes we find we need, I'll then get stuck in with a more complete power distrubution drawing. Thanks for any help you all can provide. Gerry van Dyk Tailwind W10 C-GVDZ ________________________________ Message 2 _____________________________________ Time: 04:09:24 PM PST US From: M Wilson Subject: Re: AeroElectric-List: Beginnings of my Tailwind Electrical System Hi Gerry, I just finished my Tailwind this year.=C2- =C2-I went with a simple Z-1 1 approach. The main feed from the battery contactor should be routed carefully to prev ent compromise.=C2- If you smell smoke the first thing to do is turn of t he master.=C2- That is what ultimately protects that line.I put my single P-mag on the main bus.=C2- I don't know how you are wiring your starter but it is typically powered off of the main which is where you want your P- mag power to come from.=C2- To start I turn on the master with the e-bus off. After the engine starts I turn on the avionics master and e-bus ( which is actually avionics alternate feed).=C2- The engine gauges (EIS) are powere d off of the main bus so that I can check them before engine start.Just som e thoughts.=C2-=C2- -Mike On Tuesday, December 26, 2023 at 04:17:35 PM CST, Gerry van Dyk wrote: Hello allI'm deep in thought working on the power distribution for my Tail wind Project.=C2- I'm working towards a Z13/8 implementation, the Z101 ex tras don't hold much appeal or utility for me.=C2- I hope some of you lea rned gents could give my proposed system a quick look.=C2- It's pretty ba sic so far. I'm not ready to offer my basic bus power distribution drawing or load anal ysis just yet.=C2- But I'd like to ask a question or two as I'm wrapping my head around all the issues. I note on all the Z drawings the wire from the battery contactor to the mai n bus is not fused.=C2- Is this similar to the starter cables, in that it 's a fat wire that is unlikely to be compromised? On the Z13/8 drawing I see a double pole single throw switch is used to bri ng up the main alternator (Plane Power AS 12-E160 in my case) and the batte ry contactor / main bus.=C2- I'm considering using another DPST switch to bring up the SD-8 and the alt E-bus feed.=C2- Is there any condition whe re I would want one or the other of those to be switched off? My current thought is to run the ignition start power for the pair of P-Mag s from the endurance bus.=C2- To start the engine I'd turn on the enduran ce bus, the low voltage warning should come up as the battery will be at re st.=C2- After starting the engine, the EFIS ammeter should show the SD-8 supplying power.=C2- Bringing up the main bus I'd then switch off the alt E-bus feed / SD-8 to run on the main alternator.=C2- That should satisfy preflight testing of the backup systems would it not? I'd appreciate any insights that I'm sure I'm missing so far.=C2- I've at tached a basic sketch of my proposed bus power distrubution drawing, and lo ad analysis.=C2- If any of you have thoughts or questions please offer th em.=C2- With any changes we find we need, I'll then get stuck in with a m ore complete power distrubution drawing. Thanks for any help you all can provide. Gerry van DykTailwind W10 C-GVDZ ________________________________ Message 3 _____________________________________ Time: 07:17:12 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Beginnings of my Tailwind Electrical System 'Current thought'. I like it. ;-) The master contactor provides circuit protection for the 'fat' wires (manual trip mode). Charlie Virus-free.www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Tue, Dec 26, 2023 at 4:08=AFPM Gerry van Dyk wrote: > Hello all > I'm deep in thought working on the power distribution for my Tailwind > Project. I'm working towards a Z13/8 implementation, the Z101 extras don 't > hold much appeal or utility for me. I hope some of you learned gents cou ld > give my proposed system a quick look. It's pretty basic so far. > > I'm not ready to offer my basic bus power distribution drawing or load > analysis just yet. But I'd like to ask a question or two as I'm wrapping > my head around all the issues. > > I note on all the Z drawings the wire from the battery contactor to the > main bus is not fused. Is this similar to the starter cables, in that it 's > a fat wire that is unlikely to be compromised? > > On the Z13/8 drawing I see a double pole single throw switch is used to > bring up the main alternator (Plane Power AS 12-E160 in my case) and the > battery contactor / main bus. I'm considering using another DPST switch to > bring up the SD-8 and the alt E-bus feed. Is there any condition where I > would want one or the other of those to be switched off? > > My current thought is to run the ignition start power for the pair of > P-Mags from the endurance bus. To start the engine I'd turn on the > endurance bus, the low voltage warning should come up as the battery will > be at rest. After starting the engine, the EFIS ammeter should show the > SD-8 supplying power. Bringing up the main bus I'd then switch off the a lt > E-bus feed / SD-8 to run on the main alternator. That should satisfy > preflight testing of the backup systems would it not? > > I'd appreciate any insights that I'm sure I'm missing so far. I've > attached a basic sketch of my proposed bus power distrubution drawing, an d > load analysis. If any of you have thoughts or questions please offer > them. With any changes we find we need, I'll then get stuck in with a mo re > complete power distrubution drawing. > > Thanks for any help you all can provide. > > Gerry van Dyk > Tailwind W10 C-GVDZ > ------------------------------------------------------------------------------------- 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.