---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 11/08/09: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:26 AM - Re: p-lead signal conditioning or tach gen usage (Eric M. Jones) 2. 12:13 PM - Re: wire size (James Robinson) 3. 03:46 PM - Re: wire size (Robert L. Nuckolls, III) 4. 04:41 PM - Re: wire size (James Robinson) 5. 05:03 PM - Re: wire size (Charlie England) 6. 06:10 PM - Re: wire size (James Robinson) 7. 06:43 PM - Failure Detection and Annunciation question (Allen Fulmer) ________________________________ Message 1 _____________________________________ Time: 07:26:20 AM PST US Subject: AeroElectric-List: Re: p-lead signal conditioning or tach gen usage From: "Eric M. Jones" I wanted to repost a circuit that I built for an Aeroelectric lister for his problem of interfacing two different tach generators with one tachometer. This is a simple divide by two and signal conditioner that might prove useful in these, or related efforts. I have PCBs for this and can build up one for little money. -------- 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=271690#271690 Attachments: http://forums.matronics.com//files/tacho_divider_141.jpg http://forums.matronics.com//files/tachodividerschematic_108.jpg ________________________________ Message 2 _____________________________________ Time: 12:13:37 PM PST US From: James Robinson Subject: Re: AeroElectric-List: wire size Hello Bob I have a wire size question. I use your 2 bat 2 alt all electric configuation for my Glasair. I use circuit breakers on a panel on the right side of the panel. The problem is that the person that helped me wire the airplane ran #4 wire from the firewall pass through and attached to the breaker panel. These are very stiff ( not welding cable) and put stress on the connections to the breakers. I would like to terminate the 2 #4 wires on the sidewall on 2 separate studs and from each of these two studs run 2 #10 wire (about 6 to 10 inches)to each end of the strap connecting the hot side of the breakers on each of the two circuits. I hope this is clear. My question is; would 2 #10 wire be sufficient to replace for a short run the #4 wires? Jim James Robinson Glasair lll N79R Spanish Fork UT U77 ________________________________ ________________________________ Message 3 _____________________________________ Time: 03:46:17 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: wire size At 02:09 PM 11/8/2009, you wrote: >Hello Bob >I have a wire size question. I use your 2 bat 2 alt all electric >configuation for my Glasair. I use circuit breakers on a panel on >the right side of the panel. The problem is that the person that >helped me wire the airplane ran #4 wire from the firewall pass >through and attached to the breaker panel. These are very stiff ( >not welding cable) and put stress on the connections to the >breakers. I would like to terminate the 2 #4 wires on the sidewall >on 2 separate studs and from each of these two studs run 2 #10 wire >(about 6 to 10 inches)to each end of the strap connecting the hot >side of the breakers on each of the two circuits. I hope this is >clear. My question is; would 2 #10 wire be sufficient to replace >for a short run the #4 wires? I'd really rather you didn't have all this "hardware" in the system. How about replacing the 4AWG tefzel with a 6AWG welding cable which will be MUCH easier to work with and entirely adequate for alternator outputs of 60A. I'm presuming that your alternator is no larger than this. Alternatively, a single chunk of 4AWG welding cable would be MUCH preferred. Bob . . . --------------------------------------- ( It's MATRONICS FUND RAISER MONTH! ) ( Do your part to keep this marvelous ) ( tool sharp and available to all our ) ( brothers in the OBAM aviation ) ( community. ) --------------------------------------- ________________________________ Message 4 _____________________________________ Time: 04:41:04 PM PST US From: James Robinson Subject: Re: AeroElectric-List: wire size Hi Bob Your solution is OK and doable. I just worry about the weight of the wire on the copper tie strip on the breakers. I could figure a support for the much more flexible wire. I am running a pad mount 20 amp and a belt driven 40 amp alternators. Can you make up the wires with ends if I provide the length and connector sizes? Jim James Robinson Glasair lll N79R Spanish Fork UT U77 ________________________________ From: "Robert L. Nuckolls, III" Sent: Sun, November 8, 2009 3:43:57 PM Subject: Re: AeroElectric-List: wire size At 02:09 PM 11/8/2009, you wrote: > Hello Bob > I have a wire size question. I use your 2 bat 2 alt all electric configuation for my Glasair. I use circuit breakers on a panel on the right side of the panel. The problem is that the person that helped me wire the airplane ran #4 wire from the firewall pass through and attached to the breaker panel. These are very stiff ( not welding cable) and put stress on the connections to the breakers. I would like to terminate the 2 #4 wires on the sidewall on 2 separate studs and from each of these two studs run 2 #10 wire (about 6 to 10 inches)to each end of the strap connecting the hot side of the breakers on each of the two circuits. I hope this is clear. My question is; would 2 #10 wire be sufficient to replace for a short run the #4 wires? I'd really rather you didn't have all this "hardware" in the system. How about replacing the 4AWG tefzel with a 6AWG welding cable which will be MUCH easier to work with and entirely adequate for alternator outputs of 60A. I'm presuming that your alternator is no larger than this. Alternatively, a single chunk of 4AWG welding cable would be MUCH preferred. Bob . . . --------------------------------------- ( It's MATRONICS FUND RAISER MONTH! ) ( Do your part to keep this marvelous ) ( tool sharp and available to all our ) ( brothers in the OBAM aviation ) ( community. ) --------------------------------------- ________________________________ Message 5 _____________________________________ Time: 05:03:57 PM PST US From: Charlie England Subject: Re: AeroElectric-List: wire size If you walk into your local welding supply shop & tell 'em you need x feet of #6 and y crimp-on lugs for the wire with z stud size, then ask if they know anyone who might rent you a crimper, odds are good that someone at the counter will go get a crimper out of stock & do it for you on the spot. Charlie James Robinson wrote: > Hi Bob > Your solution is OK and doable. I just worry about the weight of the > wire on the copper tie strip on the breakers. I could figure a > support for the much more flexible wire. > I am running a pad mount 20 amp and a belt driven 40 amp alternators. > Can you make up the wires with ends if I provide the length and > connector sizes? > Jim > James Robinson > Glasair lll N79R > Spanish Fork UT U77 > > > ------------------------------------------------------------------------ > *From:* "Robert L. Nuckolls, III" > *To:* aeroelectric-list@matronics.com > *Sent:* Sun, November 8, 2009 3:43:57 PM > *Subject:* Re: AeroElectric-List: wire size > > > > > At 02:09 PM 11/8/2009, you wrote: > > Hello Bob > > I have a wire size question. I use your 2 bat 2 alt all electric > configuation for my Glasair. I use circuit breakers on a panel on the > right side of the panel. The problem is that the person that helped > me wire the airplane ran #4 wire from the firewall pass through and > attached to the breaker panel. These are very stiff ( not welding > cable) and put stress on the connections to the breakers. I would > like to terminate the 2 #4 wires on the sidewall on 2 separate studs > and from each of these two studs run 2 #10 wire (about 6 to 10 > inches)to each end of the strap connecting the hot side of the > breakers on each of the two circuits. I hope this is clear. My > question is; would 2 #10 wire be sufficient to replace for a short run > the #4 wires? > > I'd really rather you didn't have all this "hardware" > in the system. How about replacing the 4AWG tefzel with > a 6AWG welding cable which will be MUCH easier to work > with and entirely adequate for alternator outputs of > 60A. I'm presuming that your alternator is no larger > than this. Alternatively, a single chunk of 4AWG welding > cable would be MUCH preferred. > > > Bob . . . ________________________________ Message 6 _____________________________________ Time: 06:10:40 PM PST US From: James Robinson Subject: Re: AeroElectric-List: wire size Thanks Charlie I have a welding shop around the corner. I'll check with them. Jim James Robinson Glasair lll N79R Spanish Fork UT U77 ________________________________ From: Charlie England Sent: Sun, November 8, 2009 4:50:56 PM Subject: Re: AeroElectric-List: wire size If you walk into your local welding supply shop & tell 'em you need x feet of #6 and y crimp-on lugs for the wire with z stud size, then ask if they know anyone who might rent you a crimper, odds are good that someone at the counter will go get a crimper out of stock & do it for you on the spot. Charlie James Robinson wrote: > Hi Bob > Your solution is OK and doable. I just worry about the weight of the wire on the copper tie strip on the breakers. I could figure a support for the much more flexible wire. > I am running a pad mount 20 amp and a belt driven 40 amp alternators. Can you make up the wires with ends if I provide the length and connector sizes? > Jim > James Robinson > Glasair lll N79R > Spanish Fork UT U77 > > > ------------------------------------------------------------------------ > *From:* "Robert L. Nuckolls, III" > *To:* aeroelectric-list@matronics.com > *Sent:* Sun, November 8, 2009 3:43:57 PM > *Subject:* Re: AeroElectric-List: wire size > > > At 02:09 PM 11/8/2009, you wrote: > > Hello Bob > > I have a wire size question. I use your 2 bat 2 alt all electric configuation for my Glasair. I use circuit breakers on a panel on the right side of the panel. The problem is that the person that helped me wire the airplane ran #4 wire from the firewall pass through and attached to the breaker panel. These are very stiff ( not welding cable) and put stress on the connections to the breakers. I would like to terminate the 2 #4 wires on the sidewall on 2 separate studs and from each of these two studs run 2 #10 wire (about 6 to 10 inches)to each end of the strap connecting the hot side of the breakers on each of the two circuits. I hope this is clear. My question is; would 2 #10 wire be sufficient to replace for a short run the #4 wires? > > I'd really rather you didn't have all this "hardware" > in the system. How about replacing the 4AWG tefzel with > a 6AWG welding cable which will be MUCH easier to work > with and entirely adequate for alternator outputs of > 60A. I'm presuming that your alternator is no larger > than this. Alternatively, a single chunk of 4AWG welding > cable would be MUCH preferred. > > > Bob . . . ________________________________ Message 7 _____________________________________ Time: 06:43:34 PM PST US From: "Allen Fulmer" Subject: AeroElectric-List: Failure Detection and Annunciation question Bob, Was reviewing your article: http://www.aeroelectric.com/articles/Failure_Detection_and_Annunciation.pdf I want to annunciate the failure of a 12v scavenge pump to draw current. You mention such a circuit being used on a heated pitot but I was wondering if it mattered if the load was a pump motor? Full load would be approximately 5 amps and it needs to be running whenever the engine is running. I figured the LED would come on whenever I put power to the ECU and Ignition and would quickly go out if the scavenge pump was pulling power as it should. Thus, even if I "forgot" to flip the switch for the scavenge pump, the LED would illuminate until I did AND the pump was pulling power. Any problem with a motor as opposed to a resistance load? Any other things I should consider? Thanks. Allen Fulmer RV7 Eggenfellner Turbo normalized 6 cyl. 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