---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 01/20/22: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:09 AM - Residue on negative battery pole (werner schneider) 2. 06:44 AM - Re: Residue on negative battery pole (Sebastien) 3. 06:53 AM - Re: Residue on negative battery pole (Werner Schneider) 4. 07:06 AM - Re: Residue on negative battery pole (Sebastien) 5. 07:35 AM - Re: Residue on negative battery pole (Charlie England) 6. 08:57 AM - Re: Re: Why CB on regulator field supply? (Robert L. Nuckolls, III) 7. 09:25 AM - Re: Residue on negative battery pole (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 02:09:50 AM PST US Subject: AeroElectric-List: Residue on negative battery pole From: "werner schneider" Had a look at the battery today (currently pretty cold and cranking not to flashy) and did see some residue on the negative battery pole, this is a Panasonic LC-XC1222P any idea what this is coming from and what to do/check next? Cheers Werner Read this topic online here: http://forums.matronics.com/viewtopic.php?p=505753#505753 Attachments: http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg ________________________________ Message 2 _____________________________________ Time: 06:44:26 AM PST US From: Sebastien Subject: Re: AeroElectric-List: Residue on negative battery pole Is it green? On Thu, Jan 20, 2022, 02:13 werner schneider wrote: > glastar@gmx.net> > > Had a look at the battery today (currently pretty cold and cranking not to > flashy) and did see some residue on the negative battery pole, this is a > Panasonic LC-XC1222P any idea what this is coming from and what to do/check > next? > > Cheers Werner > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=505753#505753 > > > Attachments: > > http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg > > ________________________________ Message 3 _____________________________________ Time: 06:53:23 AM PST US Subject: Re: AeroElectric-List: Residue on negative battery pole From: Werner Schneider Hi Sebastien, don't ask me I have a red-green deficiency, so my green is different from yours :( I would tend more to a yellow, did you have a look at the picture in the link? BTW just made a capacity test (start voltage 13.05, start Amps 3.54, stop voltage 10.75 volt with 3.1 A) after 4h 48 minutes On 20.01.2022 15:43, Sebastien wrote: > Is it green? > > On Thu, Jan 20, 2022, 02:13 werner schneider wrote: > > > > Had a look at the battery today (currently pretty cold and > cranking not to flashy) and did see some residue on the negative > battery pole, this is a Panasonic LC-XC1222P any idea what this is > coming from and what to do/check next? > > Cheers Werner > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=505753#505753 > > > Attachments: > > http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg > > > ========== > - > Electric-List" rel="noreferrer noreferrer" > target="_blank">http://www.matronics.com/Navigator?AeroElectric-Li st > ========== > FORUMS - > eferrer noreferrer" target="_blank">http://forums.matronics.com > ========== > WIKI - > errer noreferrer" target="_blank">http://wiki.matronics.com > ========== > b Site - > =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. > ="noreferrer noreferrer" > target="_blank">https://matronics.com/contribution > ========== > > ________________________________ Message 4 _____________________________________ Time: 07:06:31 AM PST US From: Sebastien Subject: Re: AeroElectric-List: Residue on negative battery pole Sorry Werner, I had not seen the attachment. It looks yellow to me as well so I'm not sure what it is. My best guess is that the battery is leaking fumes or battery acid and that's the result but I've never seen that colour before. On Thu, Jan 20, 2022, 06:56 Werner Schneider wrote: > Hi Sebastien, > > don't ask me I have a red-green deficiency, so my green is different from > yours :( I would tend more to a yellow, did you have a look at the picture > in the link? > > BTW just made a capacity test (start voltage 13.05, start Amps 3.54, stop > voltage 10.75 volt with 3.1 A) after 4h 48 minutes > > On 20.01.2022 15:43, Sebastien wrote: > > Is it green? > > On Thu, Jan 20, 2022, 02:13 werner schneider wrote: > >> glastar@gmx.net> >> >> Had a look at the battery today (currently pretty cold and cranking not >> to flashy) and did see some residue on the negative battery pole, this is a >> Panasonic LC-XC1222P any idea what this is coming from and what to do/check >> next? >> >> Cheers Werner >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=505753#505753 >> >> >> >> >> Attachments: >> >> http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg >> >> >> >> ========== >> - >> Electric-List" rel="noreferrer noreferrer" target="_blank"> >> http://www.matronics.com/Navigator?AeroElectric-List >> ========== >> FORUMS - >> eferrer noreferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer noreferrer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> ="noreferrer noreferrer" target="_blank"> >> https://matronics.com/contribution >> ========== >> >> >> >> > ________________________________ Message 5 _____________________________________ Time: 07:35:18 AM PST US Subject: Re: AeroElectric-List: Residue on negative battery pole From: Charlie England On 1/20/2022 8:52 AM, Werner Schneider wrote: > Hi Sebastien, > > don't ask me I have a red-green deficiency, so my green is different > from yours :( I would tend more to a yellow, did you have a look at > the picture in the link? > > BTW just made a capacity test (start voltage 13.05, start Amps 3.54, > stop voltage 10.75 volt with 3.1 A) after 4h 48 minutes > > On 20.01.2022 15:43, Sebastien wrote: >> Is it green? >> >> On Thu, Jan 20, 2022, 02:13 werner schneider wrote: >> >> >> >> Had a look at the battery today (currently pretty cold and >> cranking not to flashy) and did see some residue on the negative >> battery pole, this is a Panasonic LC-XC1222P any idea what this >> is coming from and what to do/check next? >> >> Cheers Werner >> Honestly, it just looks like dirt, to me. Wipe it off & see if you see any cracks/voids in the plastic or the sealant around the terminal. I'd have expected any corrosion to start at the terminal itself, and taper away from it; it looks like that stuff is in the inside corner of the case material. Charlie -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 08:57:43 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Why CB on regulator field supply? > >The characteristics of fuses vs. CB and nuisance trips were my >guesses also, but I was hoping someone had more than a guess. Since >the alternator supply is on a switch, I am not sure using a CB to >manually turn off the alternator is needed as you can just turn off >the alternator switch. ASSUMING elects to incorporate crowbar ov protection in their project, then to mitigate possible but RARE nuisance trips of the OV system, a crew accessible circuit breaker is the field supply protection of choice. In the event of an OV trip event, the pilot has an opportunity to reset the breaker ONE time to confirm the existence of failure in the alternator's regulator. ADDITIONALLY, if one chooses to use a DPST battery master switch, battery and alternator come ON-OFF together, the a pullable field supply breaker is handy for disabling the alternator for battery only ground operations thus elininating an energy wasting, full-field drain on the battery. NOTE. When picking a breaker for upstream management of field supply in the crowbar system, it is a really good idea to pick a breaker that is (1) qualified to function as designed after a substantial number of hard-fault trips. (2) actuates really fast under the typical 50 to 200A current pulse that an OV event impresses on the device. This style of breaker is highly recommended for this application: http://aeroelectric.com/Pictures/Breakers/circuitbreakers.jpg This is one of many breakers NOT suited for service upstream of a crowbar ov management device: http://aeroelectric.com/Pictures/Breakers/Breaker_Failure_1a.jpg Note also that all wound-field, alternator controllers from B&C feature built-in crowbar ov management systems. Incorporation of the recommended breaker applies to these products. I've had a few readers over the years who elected to protect their field supply with a fuse . . . this is no more hazardous than a host of other alternator failures . . . but pretty inconvenient if that fuse resides in the recommended out-of-sight- out-of-mind location in the airplane. Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ________________________________ Message 7 _____________________________________ Time: 09:25:08 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Residue on negative battery pole >Honestly, it just looks like dirt, to me. Wipe it off & see if you >see any cracks/voids in the plastic or the sealant around the >terminal. I'd have expected any corrosion to start at the terminal >itself, and taper away from it; it looks like that stuff is in the >inside corner of the case material. > >Charlie Agreed. The seal between battery posts and interior chemistry is usually pretty good in AGM batteries. Also, the stuff is a strange color for battery corrosion product. Normally a compromised seal causes corrosion to encircle the whole post https://mechanicbase.com/wp-content/uploads/2019/07/battery-terminal-corrosion.jpg if the products of oxidation are just from battery internal chemistry, the color is dingy white. If the corrosion has spread to include some terminal materials or wire, you'll get some blue-green stuff too. One good check is to pour a bit of water saturated with some baking soda on it. If you get a good 'fizz' then there's products of electrolyte corrosion in the residue . . . otherwise it's something else. According to an 'old' data sheet on this product . . . http://aeroelectric.com/Mfgr_Data/Batteries/Panasonic/lc-x1220p.pdf the battery should support a 3a load for something on the order of 6 hours. How old is the battery? If it seemed weak cranking the engine, then it may well be demonstrating high resistance and reduced capacity. If you can get your hands on a 'real' battery tester like this https://www.harborfreight.com/500-amp-carbon-pile-load-tester-91129.html make sure the battery fully charged (on maintainer until the charge light goes out), then load the battery down to 9 Volts and hold it there for 15 seconds (the harbor freight tester has a handy timer for this purpose). This battery will produce a 15 seconds crank at better than 500A when new, 300 or less along with your flagging cap-check suggests nearing end of life. Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ------------------------------------------------------------------------------------- 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.