---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 09/07/17: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:28 AM - TE KILOVAC LEV100 Question (Hariharan Gopalan) 2. 05:01 PM - Re: TE KILOVAC LEV100 Question (Robert L. Nuckolls, III) 3. 05:04 PM - Re: Troubleshooting 200G/ Z-17 (Robert L. Nuckolls, III) 4. 05:26 PM - Service loop length (Art Zemon) 5. 07:04 PM - Re: Service loop length (Charlie England) 6. 08:29 PM - Re: Service loop length (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:28:18 AM PST US From: Hariharan Gopalan Subject: AeroElectric-List: TE KILOVAC LEV100 Question Hello Group! Quick question about the TE LEV100A4ANG contactors, these have two terminals marked A1 and A2, wonder if any one has used these and if there is a preference to use A1 or A2 for supply or load side? Tried calling TE support, but havent heard back from them yet. Also, is it recommended to use the diodes with these contactors for TV suppression? Thanks Hari ________________________________ Message 2 _____________________________________ Time: 05:01:27 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: TE KILOVAC LEV100 Question At 11:26 AM 9/7/2017, you wrote: >Hello Group! > >Quick question about the TE LEV100A4ANG contactors, these have two >terminals marked A1 and A2, wonder if any one has used these and if >there is a preference to use A1 or A2 for supply or load side? Tried >calling TE support, but havent heard back from them yet. > >Also, is it recommended to use the diodes with these contactors for >TV suppression? A1 and A2 are interchangeable. Diode is suggested. The data sheet for this product excerpts as follows: Emacs! A 12 V across 26 ohms is .46 amps. This tells us that unlike some products of this genre', there is no consumption mitigation electronics for the coil power. Hence, a 'barefoot' solenoid winding. Any diode will work. I like the 1N540x series devices for their mechanical robustness. Bob . . . ________________________________ Message 3 _____________________________________ Time: 05:04:27 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Troubleshooting 200G/ Z-17 At 07:58 PM 9/6/2017, you wrote: >No worries Bob and thanks. We're all still learning about this new >LiFePo stuff. > >Talking with Nathan B at Oshkosh he said he was working on a new >regulator design for the PM alternators (might be what you're >working on.) I offered to be a beta tester as I have a data >recording engine monitor and could possibly gather some useful >data. I have data from my last 5 hours that I can provide if you >think it would be of any value. It's interesting to look at the >voltage rise vs. RPM. There is even a slight rise during runup that >I didn't notice while running up, but is clear from the data. > >Jeff Absolutely! Thank you. I'll have a bench-test article that will not be mechanically pure to the production drawings but electronically identical and air worthy. I'd be pleased to exploit your offer. Bob . . . ________________________________ Message 4 _____________________________________ Time: 05:26:31 PM PST US From: Art Zemon Subject: AeroElectric-List: Service loop length See attached photo. For the wires running between radios in my radio stack, how much service loop do I need, 12"-ish? Less? Never having had to work behind the panel of a plane, I could use your thoughts. Thanks, -- Art Z. Sent from my phone. Please excuse brevity and bizarre typos. ________________________________ Message 5 _____________________________________ Time: 07:04:30 PM PST US Subject: Re: AeroElectric-List: Service loop length From: Charlie England On 9/7/2017 7:24 PM, Art Zemon wrote: > See attached photo. > For the wires running between radios in my radio stack, how much > service loop do I need, 12"-ish? Less? Never having had to work behind > the panel of a plane, I could use your thoughts. > > Thanks, > -- Art Z. > > Sent from my phone. Please excuse brevity and bizarre typos. When you have to, you're not going to like it. Sit in the cockpit & try to imagine what you'll do when you're trying to troubleshoot the one in the middle of the stack. I left enough service loop(s) length to sit the panel on the spar (low wing), face down. Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 08:29:50 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Service loop length At 09:06 PM 9/7/2017, you wrote: >England > >On 9/7/2017 7:24 PM, Art Zemon wrote: >>See attached photo. >>For the wires running between radios in my >>radio stack, how much service loop do I need, >>12"-ish? Less? Never having had to work behind >>the panel of a plane, I could use your thoughts. >> >>Thanks, >>=C2 =C2 =C2 -- Art Z. >> >>Sent from my phone. Please excuse brevity and bizarre typos. >When you have to, you're not going to like it. >Sit in the cockpit & try to imagine what you'll >do when you're trying to troubleshoot the one in the middle of the stack. > >I left enough service loop(s) length to sit the >panel on the spar (low wing), face down. Did a design study with some guys at Lear to produce one of Leon Davis's 'mini bonanzas' a DA5 if memory serves. We designed a radio module that would hold all the radios that was held into the panel with 6 screws. Take out those screws and all the radios came out together with the interface harness terminated in a D-sub. One could take the whole thing to the bench . . . or use an extension harness to operate the radios out of the panel. This approach let us take proposals from various suppliers or hardware to build the complete stack with only the airplane interface wiring dangling off the back. Installation time on the assembly line was under 40 minutes for the whole avionics package. 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