---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 01/16/19: 12 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:38 AM - Re: Re: Recommended wire gauge for battery (Kelly McMullen) 2. 08:18 AM - Re: Re: Recommended wire gauge for battery (Charlie England) 3. 09:50 AM - Re: Internally Regulated Over Voltage Protection (BMC_Dave) 4. 11:07 AM - Battery (Ivan) 5. 11:29 AM - Re: Battery (Earl Schroeder) 6. 11:55 AM - DIY Crowbar OVM (Sebastien) 7. 12:03 PM - Re: DIY Crowbar OVM (Sebastien) 8. 01:32 PM - Re: DIY Crowbar OVM (bob noffs) 9. 06:20 PM - Re: DIY Crowbar OVM (Eric Page) 10. 08:38 PM - Switch layout idea for z-13 (Av8rrob) 11. 09:39 PM - Re: Switch layout idea for z-13 (Charlie England) 12. 09:40 PM - Re: Battery (H. Ivan Haecker) ________________________________ Message 1 _____________________________________ Time: 06:38:16 AM PST US Subject: Re: AeroElectric-List: Re: Recommended wire gauge for battery From: Kelly McMullen OK, nothing wrong with having a single heavy lead back to your remote power. The Master solenoid/contactor still should be as close as possible to the battery. Your starter wire is not going to change. The only wire you need to add is from the battery to the starter relay. You can leave the existing wire from the battery and connect it to the external power relay. Typically 24/28V wire can be one or two number sizes smaller than 14V wire for same current. That would likely put you at #4 or #6. On 1/15/2019 3:29 PM, Alec Myers wrote: > > I miswrote, and in fact the starter contactor is already on the firewall. > > So I would have to move the battery contactor only, but thats not trivial in this airplane. Also I would have to keep or install a heavy cable from the external power relay back to the battery - the external power relay, connector (through the fuselage side) and external power control relay are all colocated behind the baggage compartment. > > I was really wondering what gauge of wire people use for a 24v starter... > > > On Jan 15, 2019, at 10:26, user9253 wrote: > > > The engine is on the front of the airplane, correct? As others have said, it is > best to move the contactors forward near the battery. Weight will be less and > safety will be increased. What is the reason for not moving the contactors, no > room, more work, regulator? > > -------- > Joe Gores > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=486988#486988 > > > > > > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 08:18:21 AM PST US Subject: Re: AeroElectric-List: Re: Recommended wire gauge for battery From: Charlie England Kelly said something important: The Master solenoid/contactor still should be as close as possible to the battery. Is your inspector ok with having the battery's 'fat' wire running unprotected all the way from firewall to the back of the a/c? I know it's frustrating to get answers that aren't answers to your question, but sometimes that's needed. Charlie On 1/16/2019 8:36 AM, Kelly McMullen wrote: > > > OK, nothing wrong with having a single heavy lead back to your remote > power. The Master solenoid/contactor still should be as close as > possible to the battery. Your starter wire is not going to change. The > only wire you need to add is from the battery to the starter relay. > You can leave the existing wire from the battery and connect it to the > external power relay. > Typically 24/28V wire can be one or two number sizes smaller than 14V > wire for same current. That would likely put you at #4 or #6. > > On 1/15/2019 3:29 PM, Alec Myers wrote: >> >> I miswrote, and in fact the starter contactor is already on the >> firewall. >> >> So I would have to move the battery contactor only, but thats not >> trivial in this airplane. Also I would have to keep or install a >> heavy cable from the external power relay back to the battery - the >> external power relay, connector (through the fuselage side) and >> external power control relay are all colocated behind the baggage >> compartment. >> >> I was really wondering what gauge of wire people use for a 24v >> starter... >> >> >> On Jan 15, 2019, at 10:26, user9253 wrote: >> >> >> The engine is on the front of the airplane, correct? As others have >> said, it is >> best to move the contactors forward near the battery. Weight will be >> less and >> safety will be increased. What is the reason for not moving the >> contactors, no >> room, more work, regulator? >> >> -------- >> Joe Gores --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 3 _____________________________________ Time: 09:50:56 AM PST US Subject: AeroElectric-List: Re: Internally Regulated Over Voltage Protection From: "BMC_Dave" user9253 wrote: > Most of the battery charging current will come through the battery contactor. > Very little, if any will pass through the E-Bus diode. Another diode between > the battery and E-Bus is not desired because it will drop voltage. Not good if the battery voltage is low. Awesome, thank you. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487023#487023 ________________________________ Message 4 _____________________________________ Time: 11:07:28 AM PST US From: Ivan Subject: AeroElectric-List: Battery After 35 years of hand propping my C-85 engine, I have decided to install a B & C starter. My plan is to use a light weight lithium battery for starting only. I have no electrical system whatsoever. There will be no alternator to recharge the battery. I would like to choose a battery that will allow me a few starts (perhaps 6?) before needing to be be recharged on the ground. Any suggestions on what size / capacity battery I should be looking for? Ivan Haecker ________________________________ Message 5 _____________________________________ Time: 11:29:08 AM PST US Subject: Re: AeroElectric-List: Battery From: Earl Schroeder Hi Ivan, recommend that you forward this email to Bill at B&C. He will know & he is one of the good guys! > On Jan 16, 2019, at 1:06 PM, Ivan wrote: > > > After 35 years of hand propping my C-85 engine, I have decided to install a B & C starter. My plan is to use a light weight lithium battery for starting only. I have no electrical system whatsoever. There will be no alternator to recharge the battery. I would like to choose a battery that will allow me a few starts (perhaps 6?) before needing to be be recharged on the ground. Any suggestions on what size / capacity battery I should be looking for? > > Ivan Haecker > > > ________________________________ Message 6 _____________________________________ Time: 11:55:13 AM PST US From: Sebastien Subject: AeroElectric-List: DIY Crowbar OVM A couple years ago I ordered the parts to make an OVM for my friends aircraft. We finally got around to breadboarding it this week and we have a part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to guess what use this would be in an aircraft? Maybe I ordered it for a panel dimmer circuit or something? Also, my 0.1uF/250V capacitor https://www.digikey.ca/products/en?keywords=p10967 does not have polarity markings that I can find. The diagram shows a polarized cap. Is this just in case? If I can't find markings on my cap am I safe disregarding polarity? Thank you, Sebastien ________________________________ Message 7 _____________________________________ Time: 12:03:29 PM PST US From: Sebastien Subject: Re: AeroElectric-List: DIY Crowbar OVM Whoops. Picture attached. On Wed, Jan 16, 2019 at 11:59 AM Sebastien wrote: > A couple years ago I ordered the parts to make an OVM for my friends > aircraft. We finally got around to breadboarding it this week and we have a > part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to > guess what use this would be in an aircraft? Maybe I ordered it for a panel > dimmer circuit or something? > > Also, my 0.1uF/250V capacitor > https://www.digikey.ca/products/en?keywords=p10967 does not have polarity > markings that I can find. The diagram shows a polarized cap. Is this just > in case? If I can't find markings on my cap am I safe disregarding polarity? > > Thank you, > > Sebastien > ________________________________ Message 8 _____________________________________ Time: 01:32:36 PM PST US From: bob noffs Subject: Re: AeroElectric-List: DIY Crowbar OVM no On Wed, Jan 16, 2019 at 2:13 PM Sebastien wrote: > Whoops. Picture attached. > > On Wed, Jan 16, 2019 at 11:59 AM Sebastien wrote: > >> A couple years ago I ordered the parts to make an OVM for my friends >> aircraft. We finally got around to breadboarding it this week and we have a >> part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to >> guess what use this would be in an aircraft? Maybe I ordered it for a panel >> dimmer circuit or something? >> >> Also, my 0.1uF/250V capacitor >> https://www.digikey.ca/products/en?keywords=p10967 does not have >> polarity markings that I can find. The diagram shows a polarized cap. Is >> this just in case? If I can't find markings on my cap am I safe >> disregarding polarity? >> >> Thank you, >> >> Sebastien >> > ________________________________ Message 9 _____________________________________ Time: 06:20:53 PM PST US Subject: AeroElectric-List: Re: DIY Crowbar OVM From: "Eric Page" Sebastien, Your capacitor is non-polarized; its orientation doesn't matter. Eric Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487039#487039 ________________________________ Message 10 ____________________________________ Time: 08:38:03 PM PST US Subject: AeroElectric-List: Switch layout idea for z-13 From: "Av8rrob" How does this switch layout look to you guys for a z-13 system. Two 3 position locking switches next to each other. The first one is labeled Battery with the position of OFF/ESS/MAIN. The second switch is labeled Alternator with positions 1/OFF/2. I like the idea of the simplicity of this. Any other thoughts? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487042#487042 ________________________________ Message 11 ____________________________________ Time: 09:39:56 PM PST US Subject: Re: AeroElectric-List: Switch layout idea for z-13 From: Charlie England Break something in the design and then figure out what you'll lose when it fails, and determine whether your backup plan can still function=2E For exa mple, one of the switches comes apart=2E Will enough of the system still wo rk to get you safely on the ground? =81=A3Charlie=8B On Jan 16, 2019, 10:42 PM, at 10:42 PM, Av8rrob wrote: >--> Aer oElectric-List message posted by: "Av8rrob" > >How do es this switch layout look to you guys for a z-13 system=2E Two 3 >position locking switches next to each other=2E The first one is labeled >Battery w ith the position of OFF/ESS/MAIN=2E The second switch is labeled >Alternato r with positions 1/OFF/2=2E I like the idea of the simplicity of >this=2E Any other thoughts? > > >Read this topic online here: > >http://forums =2Ematronics=2Ecom/viewtopic=2Ephp?p=487042#487042 > > ======= m - any List utilities such as List Un/Subscription, wnload, 7-Day Browse, Chat, FAQ, > ============ B FORUMS - ==== some info to the Matronics Email List Wiki! onics=2Ecom ============== tribution Web Site - -Matt Dralle, List Admin=2E www=2Ematronics=2Ecom/contribution ====================== ________________________________ Message 12 ____________________________________ Time: 09:40:50 PM PST US From: "H. Ivan Haecker" Subject: Re: AeroElectric-List: Battery Thanks Earl. I=99ll do that. On Wed, Jan 16, 2019 at 1:33 PM Earl Schroeder wrote: > > > Hi Ivan, recommend that you forward this email to Bill at B&C. He will > know & he is one of the good guys! > > > On Jan 16, 2019, at 1:06 PM, Ivan wrote: > > > > > > After 35 years of hand propping my C-85 engine, I have decided to > install a B & C starter. My plan is to use a light weight lithium batter y > for starting only. I have no electrical system whatsoever. There will be no > alternator to recharge the battery. I would like to choose a battery that > will allow me a few starts (perhaps 6?) before needing to be be recharged > on the ground. Any suggestions on what size / capacity battery I should b e > looking for? > > > > Ivan Haecker > > > > > > > =========== =========== =========== =========== =========== > > ------------------------------------------------------------------------------------- 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.