---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 11/27/06: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:36 AM - List of Contributors Coming Soon - Make Sure You're Listed! (Matt Dralle) 1. 02:38 AM - Re: Icom A200 - Question for Stein (Robert L. Nuckolls, III) 2. 05:27 AM - Z-13 for internally regulated alt (Bill Steer) 3. 06:07 AM - Re: Z-13 for internally regulated alt (Bill Steer) 4. 06:50 AM - Re: Z-13 for internally regulated alt (Robert L. Nuckolls, III) 5. 07:52 AM - Re: Z-13 for internally regulated alt (Bill Steer) 6. 10:06 AM - Re: Z-13 for internally regulated alt (Robert L. Nuckolls, III) 7. 01:40 PM - Re: Battery Sizing (Matt Prather) 8. 03:40 PM - Continental IO-240: Alternator quit working (FlyboyTR) 9. 03:53 PM - Re: Battery Sizing (Harold Kovac) 10. 04:28 PM - Re: Continental IO-240: Alternator quit working (Matt Prather) 11. 04:37 PM - Re: Battery Sizing (springcanyon) 12. 05:05 PM - Re: Battery Sizing (Terry Watson) 13. 05:54 PM - Re: Battery Sizing (Matt Prather) ________________________________ Message 0 _____________________________________ Time: 12:36:41 AM PST US From: Matt Dralle Subject: AeroElectric-List: List of Contributors Coming Soon - Make Sure You're Listed! Dear Listers, The List of Contributors (LOC) is just around the corner! On December 1st I post a list of everyone that so generously made a Contribution to support the Lists. Its my way of publicly thanking everyone that took a minute to show their appreciation for the Lists. As a number of people have pointed out in their Contribution comments, the List seems at least as valuable of a building/flying/recreating tool as a typical your magazine subscription! And how interactive is a magazine, after all? :-) Won't you take minute and assure that your name is on the upcoming LOC? Tell others that you appreciate the Lists. Making a Contribution to support the Lists is fast and easy using your Visa, MasterCard, or Paypal account: http://www.matronics.com/contribution Or, by droping a personal check in the mail to: Matronics / Matt Dralle PO Box 347 Livermore CA 94551-0347 USA (Please include your email address on the check!) I would like to thank everyone that has so generously made a Contribution thus far during this year's List Fund Raiser! Remember that its YOUR support that keeps these Lists running and improving! Don't forget to include a little comment about how the Lists have helped you! Thank you! Matt Dralle Matronics Email List Administrator ________________________________ Message 1 _____________________________________ Time: 02:38:01 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: Icom A200 - Question for Stein At 10:42 PM 11/25/2006 -0800, you wrote: > >I've been informed by a number of people that the A200 is identical design >to the BendixKing KY96. it certainly seems functionally identical and I >recall the trays fit each other's radio. Bob, if you do get that >icom manual pse confirm ? I'm a radio tech and got some of the BK manual >from the avionics dealers (they quite rightly weren't keen to give me the >whole manual) every time i'm asked to set up an A200 I just do as I have >for the BK. The mod. level adjust pot works backwards too, just like the >original- talk about attention to detail! > >Therefore any wiring setup used for the BK hot mic intercom should apply >to the A200. I presume you're asking me about this issue. I've not dabbled in the details of the various radios for about 20 years and those radios were the kinds of systems that go into the big GA aircraft. So aside from a bit of interconnect data left over from a bygone era of my career, I no longer have access to or posses current knowledge of the details you're asking about. The honorable Stein Bruch might be your best bet for answering this question. Stein, can you help us out here? Bob . . . ________________________________ Message 2 _____________________________________ Time: 05:27:59 AM PST US From: "Bill Steer" Subject: AeroElectric-List: Z-13 for internally regulated alt I'm wiring my Zenith 601HD with a Stratus Subaru EA-81 engine using a modified version of Z-13 - the Generic wiring diagram. Part of the modification to that diagram is to accomodate the internally regulated alternator. Z-13 uses a 2-10 Battery/Alt Master switch, so the batter contacter is engaged in the first On position and both battery and alternator are connected in the second position, indicating use of a 2-3 switch. I can see an advantage of being able to take the alternator off line without shutting down the whole system using the 2-10 switch. However, a note on the wiring diagram for the OVM-14 overvoltage protection module says both the battery and alternator must come on and go off at the same time. Which switch is recommended in this situation? What is the reason for bringing the battery and alternator on and off together? Thanks very much for any help or advice. Bill Steer ________________________________ Message 3 _____________________________________ Time: 06:07:07 AM PST US From: "Bill Steer" Subject: Re: AeroElectric-List: Z-13 for internally regulated alt Oops. That "indicating use of a 2-3 switch" should have been on the "However" sentence, not the one about the 2-10 switch. Sorry for the confusion. Bill ----- Original Message ----- From: "Bill Steer" Sent: Monday, November 27, 2006 8:25 AM Subject: AeroElectric-List: Z-13 for internally regulated alt > > > I'm wiring my Zenith 601HD with a Stratus Subaru EA-81 engine using a > modified version of Z-13 - the Generic wiring diagram. Part of the > modification to that diagram is to accomodate the internally regulated > alternator. Z-13 uses a 2-10 Battery/Alt Master switch, so the batter > contacter is engaged in the first On position and both battery and > alternator are connected in the second position, indicating use of a 2-3 > switch. I can see an advantage of being able to take the alternator off > line without shutting down the whole system using the 2-10 switch. > However, a note on the wiring diagram for the OVM-14 overvoltage > protection module says both the battery and alternator must come on and go > off at the same time. > > Which switch is recommended in this situation? What is the reason for > bringing the battery and alternator on and off together? > > Thanks very much for any help or advice. > > Bill Steer > > > -- > 11/26/2006 11:30 AM > > ________________________________ Message 4 _____________________________________ Time: 06:50:38 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-13 for internally regulated alt At 08:25 AM 11/27/2006 -0500, you wrote: > >I'm wiring my Zenith 601HD with a Stratus Subaru EA-81 engine using a >modified version of Z-13 - the Generic wiring diagram. Part of the >modification to that diagram is to accomodate the internally regulated >alternator. Z-13 uses a 2-10 Battery/Alt Master switch, so the batter >contacter is engaged in the first On position and both battery and >alternator are connected in the second position, indicating use of a 2-3 >switch. I can see an advantage of being able to take the alternator off >line without shutting down the whole system using the 2-10 switch. In the early days of the Z-figures and before we had sources for reasonably priced 2-10 switches, the 2-3 COMBINED with the breaker associated with a crowbar ov protection system offers both normal operational control of battery/alternator system (it matters not whether they are ON/OFF together or progressively switched OFF/BAT/BAT+ALT). The pullable breaker offers a means by which an alternator can be kept quiet on the ground during battery only ops. You can use either combination but know also that many if not all internally regulated alternators cannot be shut down from outside should the regulator fail in a ov runaway condition. A system for offsetting that feature was published in the 'Connection some years ago (Figure Z-24 combined a b-lead contactor and OVM-14). Mis-use of this architecture (operating the alternator ON/OFF control while alternator was under load) precipitated some damage to alternator regulators. The word went out that the circuit was "flawed and not recommended." One can debate the politics of this statement endlessly but the bottom line is that I withdrew Z-24 in its original form. A new control philosophy is being explored that will offset the shortcomings of the original Z-24. See: http://www.aeroelectric.com/PPS/DCPwr/OV/z24a_Preliminary.pdf It's by belief that this product will allow any time, any conditions, ON/OFF control of an IR alternator without regard to system safety. Short answer to your question is that I recommend the 2-10 switch because it integrates nicely with the proposed 9004-1 Controller. But if you install a 2-3, the system will come on line and function as advertised but without the ability to control the alternator at will. >However, a note on the wiring diagram for the OVM-14 overvoltage >protection module says both the battery and alternator must come on and go >off at the same time. >Which switch is recommended in this situation? What is the reason for >bringing the battery and alternator on and off together? Where do you find this? I'm trying to understand the context of the statement, at the moment it doesn't seem valid . . . You can go either way but the 2-10 is recommended for the reason cite . . . Bob . . . ________________________________ Message 5 _____________________________________ Time: 07:52:29 AM PST US From: "Bill Steer" Subject: Re: AeroElectric-List: Z-13 for internally regulated alt Thanks, Bob. I'll certainly go with your recommendation for the 2-10. To answer your question about the source of the statement that said the battery and alt must come on and off together... The OVM-14 from B&C came with two wiring diagrams enclosed - one for internally and one for externally regulated alternators. Both diagrams have a statement that says "IMPORTANT - BATTERY CONTACTOR AND ALTERNATOR SHOULD COME ON AND OFF TOGETHER." Bill > > Where do you find this? I'm trying to understand the > context of the statement, at the moment it doesn't > seem valid . . . > > You can go either way but the 2-10 is recommended for > the reason cite . . . ________________________________ Message 6 _____________________________________ Time: 10:06:32 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-13 for internally regulated alt At 10:50 AM 11/27/2006 -0500, you wrote: > >Thanks, Bob. I'll certainly go with your recommendation for the 2-10. > >To answer your question about the source of the statement that said the >battery and alt must come on and off together... The OVM-14 from B&C came >with two wiring diagrams enclosed - one for internally and one for >externally regulated alternators. Both diagrams have a statement that >says "IMPORTANT - BATTERY CONTACTOR AND ALTERNATOR SHOULD COME ON AND OFF >TOGETHER."\ Hmmm . . . okay. That doesn't appear in one of my publications. Thanks! Bob . . . --------------------------------------------------------- < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss > --------------------------------------------------------- ________________________________ Message 7 _____________________________________ Time: 01:40:57 PM PST US Subject: Re: AeroElectric-List: Battery Sizing From: "Matt Prather" Hello Mr Hardin, I am just confused by the use of "Dual" and "Duel". "Duel(ling) Alternators" sounds like some kind of weird techie cartoon. Or bad regulator design. "Duel(ling) Batteries" sounds like something navel (hah!) gunners would get involved in. I apologize for picking on your message - there are so many typos/usage problems posted. This message is no worse, though it did tickle my fancy more than some others have.. Typos/usage problems can cause real headaches when communicating about topics that require some amount of precision. Some people might say "Well, they know what I mean. It's obvious." Sometimes it isn't. Sometimes it's the decimal place or the minus sign. Hmm. Here's to re-reading what you've typed before clicking the Send button. You don't have time to proof read? Do you have time to send clarifying messages when the first one you sent had errors/mistakes in it? And, if you're going to make a mistake because you don't have time to look up the correct spelling, make the mistake consistently.. A useful (though overly laden with advertisements) resource: http://www.dictionary.com Best regards, Matt- > Greetings Fellow Builders, > > Have couple straight forward questions on sizing for a duel battery set up > in a F1 Rocket with high compression (10 to 1) AEIO540 Lycoming, duel Plasma III Ignitions, duel B&C alternators a 60 amp and a 20 amp. > > Right now for electical I'm just building the battery box which will be slightly different that the plans since I want to go with (2) B&C 12V 16 A.H. batteries rather than the single 35 A.H. battery the plans call for. > I plan on building the (Z-14) Dual Battery, Duel Alternator, Split Bus type system out of Bob's book down the road in 6 months or so. > > Questions: > 1) will the duel battery set up 32 A.H. total still be enough in most cold > weather conditions maybe down below freezing 15 or 20 flights a year? I'm > running a B & C NCS206-149-12 starter. > 2) Any special mounting tips two be aware of with two batteries? Keep a space between them? > > Thanks > > Ralph Hardin Seattle Wa. > ________________________________ Message 8 _____________________________________ Time: 03:40:14 PM PST US Subject: AeroElectric-List: Continental IO-240: Alternator quit working From: "FlyboyTR" Hello, Yesterday during flight my alternator quit charging. It is a Ford design with a Continental part # 633661 and using a Zeftronics R15VOL regulator (which is showing a green light on it's self diagnostic system). It is a direct drive on the rear of the engine. I am currently checking voltage/ohms, etc. I noticed today that the alternator cooling fan does not turn when the crankshaft is rotated by hand or when the engine is running. Does this mean something mechanical has broken and my failure to charge is actually caused by the alternator not turning? I have read about a gear coupling on some larger enginesbut cant find any info regarding the alternator set up on the IO-240. Any info regarding my failed system would be greatly appreciated! Thanks in advance! Travis :) -------- Travis Rayner Mobile, AL Skystar Vixen N-789DF Read this topic online here: http://forums.matronics.com/viewtopic.php?p=77430#77430 ________________________________ Message 9 _____________________________________ Time: 03:53:46 PM PST US From: "Harold Kovac" Subject: Re: AeroElectric-List: Battery Sizing Well said, now onto the difference between "your" that which belongs to you, and "you're" meaning ....you are. Harold Kovac......no stranger to typos or other errors ----- Original Message ----- From: "Matt Prather" Sent: Monday, November 27, 2006 4:37 PM Subject: Re: AeroElectric-List: Battery Sizing > > > Hello Mr Hardin, > > I am just confused by the use of "Dual" and "Duel". "Duel(ling) > Alternators" sounds like some kind of weird techie cartoon. Or bad > regulator design. "Duel(ling) Batteries" sounds like something navel > (hah!) gunners would get involved in. > > I apologize for picking on your message - there are so many typos/usage > problems posted. This message is no worse, though it did tickle my fancy > more than some others have.. > > Typos/usage problems can cause real headaches when communicating about > topics that require some amount of precision. Some people might say > "Well, they know what I mean. It's obvious." Sometimes it isn't. > Sometimes it's the decimal place or the minus sign. Hmm. > > Here's to re-reading what you've typed before clicking the Send button. > You don't have time to proof read? Do you have time to send clarifying > messages when the first one you sent had errors/mistakes in it? > > And, if you're going to make a mistake because you don't have time to look > up the correct spelling, make the mistake consistently.. > > A useful (though overly laden with advertisements) resource: > > http://www.dictionary.com > > > Best regards, > > Matt- > > >> Greetings Fellow Builders, >> >> Have couple straight forward questions on sizing for a duel battery set > up >> in a F1 Rocket with high compression (10 to 1) AEIO540 Lycoming, duel > Plasma III Ignitions, duel B&C alternators a 60 amp and a 20 amp. >> >> Right now for electical I'm just building the battery box which will be > slightly different that the plans since I want to go with (2) B&C 12V 16 > A.H. batteries rather than the single 35 A.H. battery the plans call > for. >> I plan on building the (Z-14) Dual Battery, Duel Alternator, Split Bus > type system out of Bob's book down the road in 6 months or so. >> >> Questions: >> 1) will the duel battery set up 32 A.H. total still be enough in most > cold >> weather conditions maybe down below freezing 15 or 20 flights a year? > I'm >> running a B & C NCS206-149-12 starter. >> 2) Any special mounting tips two be aware of with two batteries? Keep a > space between them? >> >> Thanks >> >> Ralph Hardin Seattle Wa. >> > > > ________________________________ Message 10 ____________________________________ Time: 04:28:28 PM PST US Subject: Re: AeroElectric-List: Continental IO-240: Alternator quit working From: "Matt Prather" If the IO-240 is like the O200 (and other small Continentals with alternator/generator drive) it might look like this: http://www.bandc.biz/200gdesc.html There's a forged/milled piece (?) a pair of rubber bushings and a stamped sheet socket that together are used to transmit torque from the engine to the alternator. I think that in the O200 setup, the rubber bushings are kind of wear items. They get squished flatter and flatter. The few airplanes I have checked have a fair amount of slop between the gear and the alternator rotor - caused by this squishing. I suppose that if the rubber deteriorated far enough it might cause the drive fingers to fail... Unfortunately, I think if that happens it will probably drop metal into the accessory case. :( Aircraft spruce has the parts for the alternator drive: http://www.aircraftspruce.com/catalog/eppages/generatorattparts.php Again, I don't know if any of these parts are compatible with the IO-240.. The IO-240 might have more in common with the IO-360. Matt- > > > Hello, > Yesterday during flight my alternator quit charging. It is a Ford design > with a Continental part # 633661 and using a Zeftronics R15VOL regulator > (which is showing a green light on it's self diagnostic system). It is a > direct drive on the rear of the engine. I am currently checking > voltage/ohms, etc. > > I noticed today that the alternator cooling fan does not turn when the > crankshaft is rotated by hand or when the engine is running. Does this > mean something mechanical has broken and my failure to charge is actually > caused by the alternator not turning? I have read about a gear coupling > on some larger enginesbut cant find any info regarding the > alternator set up on the IO-240. Any info regarding my failed system > would be greatly appreciated! Thanks in advance! > > Travis :) > > -------- > Travis Rayner > Mobile, AL > Skystar Vixen > N-789DF > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=77430#77430 > > ________________________________ Message 11 ____________________________________ Time: 04:37:42 PM PST US From: "springcanyon" Subject: RE: AeroElectric-List: Battery Sizing Hello Mr Hardin, I am just confused by the use of "Dual" and "Duel". "Duel(ling) Alternators" sounds like some kind of weird techie cartoon. Or bad regulator design. "Duel(ling) Batteries" sounds like something navel (hah!) gunners would get involved in. Matt, I take responsibility for beginning the "duel." I guess there are cases where spell checker won't make up for my lack of proof-reading or spelling ability. Once it gets into a thread it seems to take on a life of its own. I certainly didn't mean to start a verbal "duel." I am much more interested in learning how to install and wire an airplane with "dual" alternators and "dual" batteries. I stand corrected. Thanks for the link. Don Owens http://www.dictionary.com Best regards, Matt- -- 1:40 PM ________________________________ Message 12 ____________________________________ Time: 05:05:59 PM PST US From: "Terry Watson" Subject: RE: AeroElectric-List: Battery Sizing While I agree with the idea that good spelling and punctuation helps make posts to the list more clear and understandable, I would hope that we don't intimidate or annoy those who have something to say from posting because they lack confidence in their ability to write "properly". This could be especially difficult for those whose primary language is not English. I doubt if anyone intentionally misspells or misuses words. Besides, spelling and grammar are constantly evolving. "Your" instead of "you're" for "you are" may well be considered proper in a few years. Take a look at the "language" evolving for text messaging! Keep your eye on the prize -- sharing knowledge with those with whom you share an interest. Besides, Ralph covered his bases and spelled dual both ways: "dual" and "duel". I should start doing that with "guard", or is it "gaurd". Terry RV-8A finishing and finishing and finishing Seattle Hay, what's all this cold white stuff on the ground? Do not archive! -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Harold Kovac Sent: Monday, November 27, 2006 3:52 PM Subject: Re: AeroElectric-List: Battery Sizing Well said, now onto the difference between "your" that which belongs to you, and "you're" meaning ....you are. Harold Kovac......no stranger to typos or other errors ----- Original Message ----- From: "Matt Prather" Sent: Monday, November 27, 2006 4:37 PM Subject: Re: AeroElectric-List: Battery Sizing > > > Hello Mr Hardin, > > I am just confused by the use of "Dual" and "Duel". "Duel(ling) > Alternators" sounds like some kind of weird techie cartoon. Or bad > regulator design. "Duel(ling) Batteries" sounds like something navel > (hah!) gunners would get involved in. > > I apologize for picking on your message - there are so many typos/usage > problems posted. This message is no worse, though it did tickle my fancy > more than some others have.. > > Typos/usage problems can cause real headaches when communicating about > topics that require some amount of precision. Some people might say > "Well, they know what I mean. It's obvious." Sometimes it isn't. > Sometimes it's the decimal place or the minus sign. Hmm. > > Here's to re-reading what you've typed before clicking the Send button. > You don't have time to proof read? Do you have time to send clarifying > messages when the first one you sent had errors/mistakes in it? > > And, if you're going to make a mistake because you don't have time to look > up the correct spelling, make the mistake consistently.. > > A useful (though overly laden with advertisements) resource: > > http://www.dictionary.com > > > Best regards, > > Matt- > > >> Greetings Fellow Builders, >> >> Have couple straight forward questions on sizing for a duel battery set > up >> in a F1 Rocket with high compression (10 to 1) AEIO540 Lycoming, duel > Plasma III Ignitions, duel B&C alternators a 60 amp and a 20 amp. >> >> Right now for electical I'm just building the battery box which will be > slightly different that the plans since I want to go with (2) B&C 12V 16 > A.H. batteries rather than the single 35 A.H. battery the plans call > for. >> I plan on building the (Z-14) Dual Battery, Duel Alternator, Split Bus > type system out of Bob's book down the road in 6 months or so. >> >> Questions: >> 1) will the duel battery set up 32 A.H. total still be enough in most > cold >> weather conditions maybe down below freezing 15 or 20 flights a year? > I'm >> running a B & C NCS206-149-12 starter. >> 2) Any special mounting tips two be aware of with two batteries? Keep a > space between them? >> >> Thanks >> >> Ralph Hardin Seattle Wa. >> > > > ________________________________ Message 13 ____________________________________ Time: 05:54:01 PM PST US Subject: RE: AeroElectric-List: Battery Sizing From: "Matt Prather" Terry, Certainly I agree with these sentiments. I absolutely do not want to discourage people from posting. I just like to see writers read through their messages, word by word, at least once before pressing the Send button.. No big deal. Regards, Matt- > > > While I agree with the idea that good spelling and punctuation helps make > posts to the list more clear and understandable, I would hope that we > don't > intimidate or annoy those who have something to say from posting because > they lack confidence in their ability to write "properly". This could be > especially difficult for those whose primary language is not English. I > doubt if anyone intentionally misspells or misuses words. Besides, > spelling > and grammar are constantly evolving. "Your" instead of "you're" for "you > are" may well be considered proper in a few years. Take a look at the > "language" evolving for text messaging! > > Keep your eye on the prize -- sharing knowledge with those with whom you > share an interest. Besides, Ralph covered his bases and spelled dual both > ways: "dual" and "duel". I should start doing that with "guard", or is it > "gaurd". > > Terry > RV-8A finishing and finishing and finishing > Seattle > > Hay, what's all this cold white stuff on the ground? > > Do not archive! > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Harold > Kovac > Sent: Monday, November 27, 2006 3:52 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Battery Sizing > > > > Well said, now onto the difference between "your" that which belongs to > you, > > and "you're" meaning ....you are. > Harold Kovac......no stranger to typos or other errors > ----- Original Message ----- > From: "Matt Prather" > To: > Sent: Monday, November 27, 2006 4:37 PM > Subject: Re: AeroElectric-List: Battery Sizing > > >> >> >> Hello Mr Hardin, >> >> I am just confused by the use of "Dual" and "Duel". "Duel(ling) >> Alternators" sounds like some kind of weird techie cartoon. Or bad >> regulator design. "Duel(ling) Batteries" sounds like something navel >> (hah!) gunners would get involved in. >> >> I apologize for picking on your message - there are so many typos/usage >> problems posted. This message is no worse, though it did tickle my >> fancy >> more than some others have.. >> >> Typos/usage problems can cause real headaches when communicating about >> topics that require some amount of precision. Some people might say >> "Well, they know what I mean. It's obvious." Sometimes it isn't. >> Sometimes it's the decimal place or the minus sign. Hmm. >> >> Here's to re-reading what you've typed before clicking the Send button. >> You don't have time to proof read? Do you have time to send clarifying >> messages when the first one you sent had errors/mistakes in it? >> >> And, if you're going to make a mistake because you don't have time to >> look >> up the correct spelling, make the mistake consistently.. >> >> A useful (though overly laden with advertisements) resource: >> >> http://www.dictionary.com >> >> >> Best regards, >> >> Matt- >> >> >>> Greetings Fellow Builders, >>> >>> Have couple straight forward questions on sizing for a duel battery set >> up >>> in a F1 Rocket with high compression (10 to 1) AEIO540 Lycoming, duel >> Plasma III Ignitions, duel B&C alternators a 60 amp and a 20 amp. >>> >>> Right now for electical I'm just building the battery box which will be >> slightly different that the plans since I want to go with (2) B&C 12V 16 >> A.H. batteries rather than the single 35 A.H. battery the plans call >> for. >>> I plan on building the (Z-14) Dual Battery, Duel Alternator, Split Bus >> type system out of Bob's book down the road in 6 months or so. >>> >>> Questions: >>> 1) will the duel battery set up 32 A.H. total still be enough in most >> cold >>> weather conditions maybe down below freezing 15 or 20 flights a year? >> I'm >>> running a B & C NCS206-149-12 starter. >>> 2) Any special mounting tips two be aware of with two batteries? Keep a >> space between them? >>> >>> Thanks >>> >>> Ralph Hardin Seattle Wa. >>> >> >> >> >> >> >> >> >> > > ------------------------------------------------------------------------------------- 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.