AeroElectric-List Digest Archive

Thu 04/13/06


Total Messages Posted: 23



Today's Message Index:
----------------------
 
     1. 12:11 AM - Re: More Old Struff (Mickey Coggins)
     2. 05:35 AM - Re: Current Limiter On The Aft Side of Firewall (Robert L. Nuckolls, III)
     3. 05:45 AM - Re: RV-8/8A CG location (Dale Ensing)
     4. 06:29 AM - Re: CIRCUIT BREAKERS (Robert L. Nuckolls, III)
     5. 06:40 AM - Seiko Pilot Watches on Sale. (Okay... REALLY OFF TOPIC) (Eric M. Jones)
     6. 07:09 AM - Wire gage VS length of run on Z14 (Duane Wilson)
     7. 07:31 AM - Re: Re: More Old Struff (Brian Lloyd)
     8. 07:31 AM - Re: Wire gage VS length of run on Z14 (Robert L. Nuckolls, III)
     9. 07:48 AM - GPU Plug (Sam Marlow)
    10. 08:08 AM - School Stuff (James H Nelson)
    11. 08:08 AM - Re: GPU Plug (Bruce Gray)
    12. 08:08 AM - School stuff (James H Nelson)
    13. 08:33 AM - Re: GPU Plug (Sam Marlow)
    14. 08:47 AM - Re: School stuff (Brian Lloyd)
    15. 09:41 AM - Re: GPU Plug (LarryRosen@comcast.net)
    16. 10:10 AM - Re: Current Limiter On The Aft Side of Firewall (Jerry Grimmonpre)
    17. 10:15 AM - Re: Re: RV-8/8A CG location (Jerry Grimmonpre)
    18. 11:08 AM - Re: CIRCUIT BREAKERS (Jerry Grimmonpre)
    19. 02:15 PM - Re: Re: RV-8/8A CG location (Dale Ensing)
    20. 02:34 PM - Re: School Stuff (rlnelson5)
    21. 05:33 PM - Re: CIRCUIT BREAKERS (Robert L. Nuckolls, III)
    22. 07:58 PM - SD-8 PM Alternator (J. Mcculley)
    23. 09:17 PM - Re: GPU Plug (Sam Marlow)
 
 
 


Message 1


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    Time: 12:11:28 AM PST US
    From: Mickey Coggins <mick-matronics@rv8.ch>
    Subject: Re: More Old Struff
    --> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch> > If it had been a public school I would now be in jail for having a > firearm on campus. :-0 Guns? In a school? Are you CrAzY?!?! Next thing you know you're going to teach them about the 2nd amendment! Where will it end? Actual knowledge of the entire bill of rights? :-) -- Mickey Coggins http://www.rv8.ch/ #82007 finishing do not archive


    Message 2


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    Time: 05:35:41 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net> Firewall
    Subject: Re: Current Limiter On The Aft Side of Firewall
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> Firewall At 02:31 PM 4/12/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> > <snip> > > > > What system needs a higher fuse value than 15A? > >The endurance bus feed is planned to be tapped off the hot battery bus >through a fuse similar to Z12. The endurance bus will be running about >22A. It seems this feed wire needs to be moved to the hot battery bus lug. >Should this be done and what method of wire protection should be used with >this source of power for the endurance bus? Understand on locations. How does the e-bus load get so high? Bob . . .


    Message 3


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    Time: 05:45:37 AM PST US
    From: "Dale Ensing" <densing@carolina.rr.com>
    Subject: Re: RV-8/8A CG location
    --> AeroElectric-List message posted by: "Dale Ensing" <densing@carolina.rr.com> Check out this site for comparison of weight & balance/CG location on RV-8 vs 9A. Dale Ensing do not archive


    Message 4


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    Time: 06:29:15 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: CIRCUIT BREAKERS
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 01:36 PM 4/12/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> > >Bruce, >I'm just trying to find a suitable B lead protection with the following >questions ... no foul intended, Bruce. Have you used a fuselink for the >purpose expressed below? What gage wire are you advocating to use with say, >a 10 AWG B lead from the alternator? When you say 10AWG b-lead feeder, I presume you're talking about a SMALL alternator, like the SD20. Here you're talking about fusible links on the same order as those used in automobiles (14AWG). Yeah, that size b-lead/alternator combination is probably a good candidate for fusible link . . . but under the cowl. > The standards . . . Let's be careful about what we label as "standards" . . . the fusible links in automotive applications are common practice supported by good science and practical experience. If we elevate the practice to a "standard" then the next creep in concept will elevate it to a regulation. There are roaming hoards of individuals constantly on the lookout for things to elevate to regulatory status all in the name of safety . . . and nobody is against being safer, right? > . . . point to using four gages smaller, or, 14 AWG. Is this what you > are advocating to substitute for say a 70A CB or 80A current limiter? Here's where we get a disconnect. A 10AWG/14AWG feeder-link combo is in the 20-30A alternator class. If you're looking to replace a 70A breaker, then we're talking 6AWG or 4AWG feeders and fusible links are indeed impractical. Then the CB or current limiter becomes hardware of choice. Since the b-lead protection does not benefit from pilot access, a limiter is attractive. Know that limiters have a VERY long and conservative operating time constant compared with fuses. See: http://aeroelectric.com/articles/anl/anlvsjjs.html Note that a 100A limiter will carry 170A indefinitely and that it's blowing time constant is much longer than fuses. Breakers fall between fuses and limiters with respect to sensitivity and speed. Which b-lead are you wrestling with? An SD-20 or something larger? Bob . . .


    Message 5


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    Time: 06:40:43 AM PST US
    Subject: Seiko Pilot Watches on Sale. (Okay... REALLY OFF TOPIC)
    From: "Eric M. Jones" <emjones@charter.net>
    --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> Overstock.com has the classic Seiko pilot watches on deep discount-- $99.99 for the blue face and $115.99 for the black. Way cool..... -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=28122#28122


    Message 6


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    Time: 07:09:55 AM PST US
    From: Duane Wilson <aaa@pacifier.com>
    Subject: Wire gage VS length of run on Z14
    --> AeroElectric-List message posted by: Duane Wilson <aaa@pacifier.com> I am building an RV9A with the Z-14 as my electrical system. I need help understanding what gage of wire to use in a few spots. In particular there are some specifications on the schematic that state the run should be 6 inches or less from the battery contactors to the batt bus. 10 AWG is recommended for these runs, but the load on these buses should be very light. Why the length restriction, and if I can't place the bat buses within 6 inches of the contactors how should I figure the correct wire gage? Same type of question for the 4AWG from the Aux batt to the contactor Thanks, Duane


    Message 7


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    Time: 07:31:30 AM PST US
    From: Brian Lloyd <brian-yak@lloyd.com>
    Subject: Re: More Old Struff
    --> AeroElectric-List message posted by: Brian Lloyd <brian-yak@lloyd.com> Mickey Coggins wrote: > --> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch> > >> If it had been a public school I would now be in jail for having a >> firearm on campus. :-0 > > Guns? In a school? Are you CrAzY?!?! Next thing you know > you're going to teach them about the 2nd amendment! Where > will it end? Actual knowledge of the entire bill of rights? :-) You know the most interesting thing? Not a single parent complained. do not archive -- Brian Lloyd 361 Catterline Way brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery


    Message 8


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    Time: 07:31:30 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Wire gage VS length of run on Z14
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 07:08 AM 4/13/2006 -0700, you wrote: >--> AeroElectric-List message posted by: Duane Wilson <aaa@pacifier.com> > >I am building an RV9A with the Z-14 as my electrical system. I need >help understanding what gage of wire to use in a few spots. > > In particular there are some specifications on the schematic that >state the run should be 6 inches or less from the battery contactors to >the batt bus. 10 AWG is recommended for these runs, but the load on >these buses should be very light. > Why the length restriction, and if I can't place the bat buses >within 6 inches of the contactors how should I figure the correct wire gage? > > Same type of question for the 4AWG from the Aux batt to the contactor The Z-figures are illustrative of ARCHITECTURES. All wires, breakers, fuses, etc should be sized in accordance with the details of equipment you choose to install. The values shown are typcial but not necessarily applicable to YOUR project. Battery busses should be as close to the battery as practical. The industry practice is that small feeders of 6" or less do not represent a significant hazard to flight if they should be faulted to destruction. If you're going to extend a battery bus, then it becomes just another main, aux or e-bus. In this case, practice suggests that you provide it with its own mini-contactor like the e-bus fat feeder shown at: http://www.aeroelectric.com/Pictures/Schematics/E-BusFatFeed.gif If it's a battery bus, then it's close to the battery and is fitted with fuses no larger than 7A. Again, an industry practice . . . 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 9


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    Time: 07:48:02 AM PST US
    From: Sam Marlow <sam.marlow@adelphia.net>
    Subject: GPU Plug
    --> AeroElectric-List message posted by: Sam Marlow <sam.marlow@adelphia.net> Can someone point me in the right direction for wiring a GPU plug on my RV10, Piper type?


    Message 10


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    Time: 08:08:56 AM PST US
    Subject: School Stuff
    From: James H Nelson <rv9jim@juno.com>
    --> AeroElectric-List message posted by: James H Nelson <rv9jim@juno.com> Hi Brian, Now that is the kind of teacher we all need. Realism and down to earth examples of technology will mean that history will be remembered. There are so few teachers who make it interesting. Thank goodness for private schools. I taught for one semester in high school. Got out of the garbage heap real quick and went on to a real job. I taught "shop", electronics, metals and wood to freshman thru seniors. Jim Do not archive


    Message 11


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    Time: 08:08:56 AM PST US
    From: "Bruce Gray" <Bruce@glasair.org>
    Subject: GPU Plug
    --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> Try, http://aeroelectric.com/articles/grndpwr.pdf Bruce www.glasair.org -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam Marlow Sent: Thursday, April 13, 2006 10:46 AM Subject: AeroElectric-List: GPU Plug --> AeroElectric-List message posted by: Sam Marlow <sam.marlow@adelphia.net> Can someone point me in the right direction for wiring a GPU plug on my RV10, Piper type?


    Message 12


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    Time: 08:08:56 AM PST US
    Subject: School stuff
    From: James H Nelson <rv9jim@juno.com>
    --> AeroElectric-List message posted by: James H Nelson <rv9jim@juno.com> Careful Mickey, the "Government" school goons may come to your door. Teaching about our heritage and RIGHTS per the constitution have become a scarce mention in todays "schools" of indoctrination. Jim do not archive


    Message 13


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    Time: 08:33:15 AM PST US
    From: Sam Marlow <sam.marlow@adelphia.net>
    Subject: Re: GPU Plug
    --> AeroElectric-List message posted by: Sam Marlow <sam.marlow@adelphia.net> Thanks! do not archive Bruce Gray wrote: >--> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> > >Try, >http://aeroelectric.com/articles/grndpwr.pdf > >Bruce >www.glasair.org > > >-----Original Message----- >From: owner-aeroelectric-list-server@matronics.com >[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam >Marlow >Sent: Thursday, April 13, 2006 10:46 AM >To: aeroelectric-list@matronics.com >Subject: AeroElectric-List: GPU Plug > > >--> AeroElectric-List message posted by: Sam Marlow ><sam.marlow@adelphia.net> > >Can someone point me in the right direction for wiring a GPU plug on my >RV10, Piper type? > > > > > > > > > > > > > >


    Message 14


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    Time: 08:47:39 AM PST US
    From: Brian Lloyd <brian-yak@lloyd.com>
    Subject: Re: School stuff
    --> AeroElectric-List message posted by: Brian Lloyd <brian-yak@lloyd.com> James H Nelson wrote: > --> AeroElectric-List message posted by: James H Nelson <rv9jim@juno.com> > > Careful Mickey, the "Government" school goons may come to your door. > Teaching about our heritage and RIGHTS per the constitution have become a > scarce mention in todays "schools" of indoctrination. You know, my experience is that mostly the teachers are just clueless. They aren't inimical. The really believe that the "party line" is right. God save us from people with good intentions. Worse still is that they don't really know their subjects. They don't know how to show kids the patterns in math and numbers so it becomes easy to visualize. They don't understand scientific method and that it is OK to know the what and the how but not the why. And in history they can talk about the dates things occurred but ask them to talk about the causes and effects and you just get the "deer in the headlights" look. I really like the school where I have found myself working because I get to talk about this kind of stuff. The only mandate I have is to make all of my classes hands-on, hence charts, plotters, E6Bs, batteries, wire, compasses, measuring tapes, historic firearms, etc. I am even thinking of setting up a ham station and staging hidden transmitter hunts (let them apply their newly-learned triangulation and map reading skills). And for English (which my just-about-to-graduate-from-college son is student teaching) the kids are acting Shakespeare (6th graders no less). They love it. OTOH, it was a scream the other day as they were going through the cast of characters for "Twelfth Night" and one girl asked, "what's a eunuch?" The ensuing response had me all but rolling on the floor. He hemmed and hawed a bit with the kids getting more and more confused. Finally he says, "It's like what they do to a male dog, you know, 'snip snip'," while making scissors-motions with his fingers. The kids got it. Eyes went wide and there was a chorus of "Ohhh!" and "Ewwww!" The headmistress and I had to turn around so the kids couldn't see the tears of laughter streaming down our faces. And we still didn't get any complaints from parents. Go figure. Time to start taking them for Young Eagles rides and letting them do some flight planning for flights we can actually fly. I also have to plan a field trip for them to Norcal TRACON. Sorry for getting so far afield. Back to electrical systems. do not archive -- Brian Lloyd 361 Catterline Way brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery


    Message 15


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    Time: 09:41:05 AM PST US
    From: LarryRosen@comcast.net
    Subject: GPU Plug
    --> AeroElectric-List message posted by: LarryRosen@comcast.net Sam, Where are you planning on mounting your power plug on the RV-10? Someone is mounting the plug in there rear close out panel http://jharris.net/Aviation/RV_10.htm and Vans prototype has it mounted under the instrument panel on the out board pilot side. Larry Rosen http://lrosen.nerv10.com -------------- Original message -------------- From: "Bruce Gray" <Bruce@glasair.org> > --> AeroElectric-List message posted by: "Bruce Gray" > > Try, > http://aeroelectric.com/articles/grndpwr.pdf > > Bruce > www.glasair.org > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam > Marlow > Sent: Thursday, April 13, 2006 10:46 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: GPU Plug > > > --> AeroElectric-List message posted by: Sam Marlow > > > Can someone point me in the right direction for wiring a GPU plug on my > RV10, Piper type? > > > > > > > > > > > > > > > > > > > > > > > > > Sam, Where are you planning on mounting your power plug on the RV-10? Someone is mounting the plug in there rear close out panel http://jharris.net/Aviation/RV_10.htm and Vans prototype has it mounted under the instrument panel on the out board pilot side. Larry Rosen http://lrosen.nerv10.com -------------- Original message -------------- From: "Bruce Gray" Bruce@glasair.org -- AeroElectric-List message posted by: "Bruce Gray" <BRUCE@GLASAIR.ORG> Try, http://aeroelectric.com/articles/grndpwr.pdf Bruce www.glasair.org -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam Marlow Sent: Thursday, April 13, 2006 10:46 AM To: aeroelectric-list@matronics.com Subject: AeroElectric-List: GPU Plug -- AeroElectric-List message posted by: Sam Marlow <SAM.MARLOW@ADELPHIA.NET> Can someone point me in the right direction for wiring a GPU plug on my RV10, Piper type? & gt; >


    Message 16


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    Time: 10:10:51 AM PST US
    From: "Jerry Grimmonpre" <jerry@mc.net>
    Subject: Re: Current Limiter On The Aft Side of Firewall
    --> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> Do Not Archive Hi Robert ... Your thoughts about the 8 cg being more fwd, were thought provoking sending me to Van's site. Empirical comparisons brings me to the possible belief the lack of rake on the 8 gear along with the weight of the towers, could place the cg fwd of the 8A. That tail wheel, being some 16' aft of the main gear, does serve as a powerful arm in the scheme of things. Thanks for your info Robert. Jerry Grimmonpre' > --> AeroElectric-List message posted by: Robert Sultzbach > <endspeed@yahoo.com> > > Hi Jerry, I too, believed the 8A would be more > forward in cg than the tailwheel 8. I came across > some info, where escapes me, that stated the 8A is > actually less forward in cg than the 8. Apparently, > the gear towers in the 8 are quite heavy and move the > cg more than the 8A's nose gear. Investigate this to > verify it. I too, will check it out. Bob > > --- Jerry Grimmonpre <jerry@mc.net> wrote:


    Message 17


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    Time: 10:15:23 AM PST US
    From: "Jerry Grimmonpre" <jerry@mc.net>
    Subject: Re: RV-8/8A CG location
    --> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> Do Not Archive Hey Dale ... how are you doing after snf? The site mentioned didn't make it with your post ... did you mean 9A or 8A below? Thanks ... Jerry > --> AeroElectric-List message posted by: "Dale Ensing" > <densing@carolina.rr.com> > > Check out this site for comparison of weight & balance/CG location on RV-8 > vs 9A. > Dale Ensing > do not archive


    Message 18


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    Time: 11:08:58 AM PST US
    From: "Jerry Grimmonpre" <jerry@mc.net>
    Subject: Re: CIRCUIT BREAKERS
    --> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > <nuckollsr@cox.net> > > At 01:36 PM 4/12/2006 -0500, you wrote: > > When you say 10AWG b-lead feeder, I presume you're talking > about a SMALL alternator, like the SD20. Here you're talking > about fusible links on the same order as those used in automobiles > (14AWG). Yeah, that size b-lead/alternator combination is probably > a good candidate for fusible link . . . but under the cowl. My bad Bob ... I erroneously labeled a 60A alt B lead with a 10 AWG and stared at for so many days ... began to believe it as well. It deserves a 6 AWG ... correct me if wrong. In this installation, would a 60A current limiter be OK since the CL have an 80% over load rating? > http://aeroelectric.com/articles/anl/anlvsjjs.html Thanks for the link and your leadership, Bob ... that clears up alot. Jerry Grimmonpre'


    Message 19


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    Time: 02:15:38 PM PST US
    From: "Dale Ensing" <densing@carolina.rr.com>
    Subject: Re: RV-8/8A CG location
    --> AeroElectric-List message posted by: "Dale Ensing" <densing@carolina.rr.com> Sorry people. Jerry Grimmonpre pointed out that I forgot to include the weight&balance/CG web site address for comparing the CG location of 8/8A aircraft. here it is: http://www.rvproject.com/wab/ Dale Ensing


    Message 20


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    Time: 02:34:53 PM PST US
    Subject: Re: School Stuff
    From: "rlnelson5" <rlnelson-5@peoplepc.com>
    --> AeroElectric-List message posted by: "rlnelson5" <rlnelson-5@peoplepc.com> I think it goes more to how committed to excellence is your local school district. I live in Dist. 196 in the South metro of St Paul/Mpls. MN The district was named a District of Excellence by both the state of MN and the US Dept of ED. . My sons have gone to a public school through high school and all three schools have the above credentiials. Incidentially in middle school[678] here ,we had a firearms class given for the 6th grade. We brought guns to school and actually went out to a farm on a school bus and had all the kids try a .22, 30/30 ,.30 06, and a shotgun. All ammo ,targets paid for by the school. It isnt like every school is bad in the US. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=28248#28248


    Message 21


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    Time: 05:33:04 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: CIRCUIT BREAKERS
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 01:05 PM 4/13/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Jerry Grimmonpre" <jerry@mc.net> > > > > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > > <nuckollsr@cox.net> > > > > At 01:36 PM 4/12/2006 -0500, you wrote: > > > > When you say 10AWG b-lead feeder, I presume you're talking > > about a SMALL alternator, like the SD20. Here you're talking > > about fusible links on the same order as those used in automobiles > > (14AWG). Yeah, that size b-lead/alternator combination is probably > > a good candidate for fusible link . . . but under the cowl. > >My bad Bob ... >I erroneously labeled a 60A alt B lead with a 10 AWG and stared at for so >many days ... began to believe it as well. It deserves a 6 AWG ... correct >me if wrong. In this installation, would a 60A current limiter be OK since >the CL have an 80% over load rating? > > > http://aeroelectric.com/articles/anl/anlvsjjs.html > >Thanks for the link and your leadership, Bob ... that clears up alot. You're correct. An ANL 60 will be just fine on the b-lead of a 60A alternator. Bob . . .


    Message 22


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    Time: 07:58:06 PM PST US
    From: "J. Mcculley" <mcculleyja@starpower.net>
    Subject: SD-8 PM Alternator
    --> AeroElectric-List message posted by: "J. Mcculley" <mcculleyja@starpower.net> Bob N,et al, There has been periodic discussion on this list in the past about the SD-8(& maybe other permanent magnet alternators)not being capable of coming on line if the battery or other power source to the buss fails or is not otherwise available to activate the SD-8. I have experimented with a simple idea that solves this situation and want to share the info to solicit comments on the suitability or any downside features anyone may offer. The circuit consists of tapping into the SD-8 regulator output and feeding that through a diode to the positive side of an electrolytic capacitor, grounding the negative lead of the capacitor and connecting a spring loaded,normally-open push-button switch across the diode. After engine start-up and during the subsequent pre-flight system check of the SD-8, it charges the capacitor and the diode prevents loss of this charge thereafter even if the SD-8 is not left switched on. If total loss of electrical power to the buss occurs during flight, the SD-8 will come on line by momentarily activating the push button switch while also closing the SD-8 switch to the buss. Through both ground and flight testing, I found no situation where it failed to work. An unexpected finding is that the SD-8 will activate with as low as 1.0 volt charge on the capacitor! Another bonus is that the capacitor leakage rate is so low that from an initial charge of only 12.5 volts, it requires 2 hours short of 3 full days to leak down to 10.5 volts! (average of 0.0286 volts per hour). Of course, this rate is progressively less as the charge voltage drops further, so if someone left the Master on and killed the battery and then wanted to prop the engine many days later(more than 2 weeks!)the SD-8 could then be brought on line!! BTW,I'm using a 56kmf,16V(20Vsurge)capacitor from Digi-Key, P/N P6878-ND, at less than $8. Less capacity should also work adequately,but the already small size, weight and cost doesn't contribute enough to cause concern. What puzzles me is how the SD-8 and its regulator can respond to a voltage as low as 1.0. Can someone explain this? Jim McCulley Tailwind


    Message 23


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    Time: 09:17:11 PM PST US
    From: Sam Marlow <sam.marlow@adelphia.net>
    Subject: Re: GPU Plug
    --> AeroElectric-List message posted by: Sam Marlow <sam.marlow@adelphia.net> I'm putting it on the left side of the fuselage across from the battery, above the flap. LarryRosen@comcast.net wrote: >--> AeroElectric-List message posted by: LarryRosen@comcast.net > >Sam, >Where are you planning on mounting your power plug on the RV-10? Someone is mounting the plug in there rear close out panel http://jharris.net/Aviation/RV_10.htm and Vans prototype has it mounted under the instrument panel on the out board pilot side. > >Larry Rosen >http://lrosen.nerv10.com > >-------------- Original message -------------- >From: "Bruce Gray" <Bruce@glasair.org> > > > >>--> AeroElectric-List message posted by: "Bruce Gray" >> >>Try, >>http://aeroelectric.com/articles/grndpwr.pdf >> >>Bruce >>www.glasair.org >> >> >>-----Original Message----- >>From: owner-aeroelectric-list-server@matronics.com >>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam >>Marlow >>Sent: Thursday, April 13, 2006 10:46 AM >>To: aeroelectric-list@matronics.com >>Subject: AeroElectric-List: GPU Plug >> >> >>--> AeroElectric-List message posted by: Sam Marlow >> >> >>Can someone point me in the right direction for wiring a GPU plug on my >>RV10, Piper type? >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > >Sam, >Where are you planning on mounting your power plug on the RV-10? Someone is mounting the plug in there rear close out panel http://jharris.net/Aviation/RV_10.htm and Vans prototype has it mounted under the instrument panel on the out board pilot side. > >Larry Rosen >http://lrosen.nerv10.com > >-------------- Original message -------------- >From: "Bruce Gray" Bruce@glasair.org > > -- AeroElectric-List message posted by: "Bruce Gray" <BRUCE@GLASAIR.ORG> > > Try, > http://aeroelectric.com/articles/grndpwr.pdf > > Bruce > www.glasair.org > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sam > Marlow > Sent: Thursday, April 13, 2006 10:46 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: GPU Plug > > > -- AeroElectric-List message posted by: Sam Marlow > <SAM.MARLOW@ADELPHIA.NET> > > Can someone point me in the right direction for wiring a GPU plug on my > RV10, Piper type? > > >& >gt; > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >




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