AeroElectric-List Digest Archive

Sat 10/03/09


Total Messages Posted: 13



Today's Message Index:
----------------------
 
     1. 05:56 AM - Re: Z-16 Alternator disconnect (Robert L. Nuckolls, III)
     2. 06:28 AM - Re: Z-14 alternator wire guage?? (Robert L. Nuckolls, III)
     3. 09:25 AM - Pitot Wiring Connectors (Chuck Jensen)
     4. 10:24 AM - Appendix Z (Robert L. Nuckolls, III)
     5. 10:48 AM - Re: Pitot Wiring Connectors (Robert L. Nuckolls, III)
     6. 11:21 AM - Re: Pitot Wiring Connectors (B Tomm)
     7. 01:13 PM - Re: Pitot Wiring Connectors (Chuck Jensen)
     8. 02:26 PM - Wiring the LR3C-14 (Ben Cunningham)
     9. 02:28 PM - Re: Pitot Wiring Connectors (Neal George)
    10. 02:42 PM - Re: Pitot Wiring Connectors (Bob White)
    11. 02:53 PM - Re: Basic Electrical Architecture for review... (Marvin Haught)
    12. 06:47 PM - Re: Pitot Wiring Connectors (Chuck Jensen)
    13. 07:52 PM - 24V Heated Pitot (Joe Dubner)
 
 
 


Message 1


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    Time: 05:56:28 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Z-16 Alternator disconnect
    At 12:21 PM 10/2/2009, you wrote: > >I'm working off Z-16. Rev M. I have the Cessna type split master. >For the sake of argument, if I were to eliminate the Alternator OV >disconnect relay, then would I simply interrupt one of the yellow >alt wires with my master in order to take the Alternator off-line? Yes, if you wanted to load the switch that heavily. You wouldn't have OV protection either. Recommend you keep the relay. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 2


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    Time: 06:28:47 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Z-14 alternator wire guage??
    At 12:50 AM 10/3/2009, you wrote: >I have the latest revision of Z14 (REV N 7/14/09) which shows that >the Main Alternator (40 amp) has a 4 AWG B-lead. BUT the Aux >Alternator (also 40 amp) has a 10 AWG B-lead. > >Is there any possible logic in this discrepancy. No, there were some artifacts of cut-n-paste that didn't get combed out before the drawing was last published. They've been corrected. The latest drawing can be downloaded from the website. > >My calculations indicate that for a standard Lycoming set-up with >main alternator at the front of the engine and the aux alternator on >the rear of the engine 10 AWG should be more than enough for the >B-leads for both, providing the battery is FWF. > >Am I missing something here. I recommend 4AWG for all fat wires just because you need to buy enough of it to take care of battery/ starter wiring. It's just handy to use the same gage for all fat wires. I'd leave the Main alternator at 4AWG and wire the Aux alternator for 20A as shown on the corrected drawing. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 3


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    Time: 09:25:57 AM PST US
    Subject: Pitot Wiring Connectors
    From: "Chuck Jensen" <cjensen@dts9000.com>
    Curious if anyone had a solution for a connector problem. I sent off my Velocity's sharkfin pitot for plating and when it came back, the two wires to the heating elements were missing. The two wires had female pin connectors which mate to the two male pins of the heating elements. The female connector slides right over the male pins. By memory, the pins are approx. 2-3/32nd inch in diameter and approximately 1/2" long. I've seen similar pins on some other pitots, but have not been able to find the connectors that I can attach termials ends to to hook up to the plane wiring. Anybody know of a source for female pin connectors that might work? Chuck Jensen


    Message 4


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    Time: 10:24:29 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Appendix Z
    Change 4 to Appendix Z has been published to correct some errors. Figure Z-9 for Corvair Engines was developed in cooperation with William Wynne and several of his customers. That figure has been added to the suite of architecture drawings. http://aeroelectric.com/R12A/AppZ_12A4.pdf Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 5


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    Time: 10:48:57 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Pitot Wiring Connectors
    At 11:16 AM 10/3/2009, you wrote: >Curious if anyone had a solution for a connector problem. I sent >off my Velocity's sharkfin pitot for plating and when it came back, >the two wires to the heating elements were missing. The two wires >had female pin connectors which mate to the two male pins of the >heating elements. The female connector slides right over the male >pins. By memory, the pins are approx. 2-3/32nd inch in diameter and >approximately 1/2" long. I've seen similar pins on some other >pitots, but have not been able to find the connectors that I can >attach termials ends to to hook up to the plane wiring. > >Anybody know of a source for female pin connectors that might work? I've never seen a heated pitot tube that did not mate the AN3113-1 connector. That doesn't mean that yours is the same format . . . but I suspect it is. The AN3115-1 is a pricey dude. ACS get about $60 for it . . . http://www.aircraftspruce.com/catalog/inpages/heatedptubes2.php . . . and offer it under their own part number. Others on the 'net get as much as $100 for it. I've contemplated building these and even have a set of drawings and a slitting saw to do the cross-cuts in the receptacles. See . . . http://www.aeroelectric.com/Pictures/Connectors/AN3115_Pitot_Tube_Heater/ I built one set of pins way back when and they would probably have worked well. After looking at the hassles of tooling up a housing and considering just how many connectors I might sell . . . well, let's just say the blush was off the rose. If it were my airplane, I would solder pigtails onto the extended pins and install my own connectors on the ends of the pigtails. Say "power pole" style connector like those used on B&C PM alternators? Bob . . .


    Message 6


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    Time: 11:21:55 AM PST US
    From: "B Tomm" <fvalarm@rapidnet.net>
    Subject: Pitot Wiring Connectors
    Say "power pole" style connector like those used on B&C PM alternators? Bob, I've done a quick search for "power pole". Can you supply a link to a supplier? Bevan RV7A wiring


    Message 7


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    Time: 01:13:48 PM PST US
    Subject: Pitot Wiring Connectors
    From: "Chuck Jensen" <cjensen@dts9000.com>
    Bob, Thanks for the link. Yes, it looks like that connector would fit, though it is different than what was on the pitot initiatlly, which worked fine, but was apparently 'home made'. The photos show the original connectors on the old pitot in which the element had gone bad. The connectors just 'pop off'. The old pitot wassilver-soldered and servicing was 'not possible', but I had the good fortune to find a like Kolhsman pitot on ebay for $15; find of the decade, which I sent off to have plated, but then the connecting wires became lost. If I'm unable to find the bare connectors, perhaps I'll have to dig down into the green moldy stuff and cough up for the one shown in your link. Chuck Jensen -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert L. Nuckolls, III Sent: Saturday, October 03, 2009 1:44 PM Subject: Re: AeroElectric-List: Pitot Wiring Connectors <nuckolls.bob@aeroelectric.com> At 11:16 AM 10/3/2009, you wrote: >Curious if anyone had a solution for a connector problem. I sent >off my Velocity's sharkfin pitot for plating and when it came back, >the two wires to the heating elements were missing. The two wires >had female pin connectors which mate to the two male pins of the >heating elements. The female connector slides right over the male >pins. By memory, the pins are approx. 2-3/32nd inch in diameter and >approximately 1/2" long. I've seen similar pins on some other >pitots, but have not been able to find the connectors that I can >attach termials ends to to hook up to the plane wiring. > >Anybody know of a source for female pin connectors that might work? I've never seen a heated pitot tube that did not mate the AN3113-1 connector. That doesn't mean that yours is the same format . . . but I suspect it is. The AN3115-1 is a pricey dude. ACS get about $60 for it . . . http://www.aircraftspruce.com/catalog/inpages/heatedptubes2.php . . . and offer it under their own part number. Others on the 'net get as much as $100 for it. I've contemplated building these and even have a set of drawings and a slitting saw to do the cross-cuts in the receptacles. See . . . http://www.aeroelectric.com/Pictures/Connectors/AN3115_Pitot_Tube_Heater/ I built one set of pins way back when and they would probably have worked well. After looking at the hassles of tooling up a housing and considering just how many connectors I might sell . . . well, let's just say the blush was off the rose. If it were my airplane, I would solder pigtails onto the extended pins and install my own connectors on the ends of the pigtails. Say "power pole" style connector like those used on B&C PM alternators? Bob . . .


    Message 8


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    Time: 02:26:58 PM PST US
    From: Ben Cunningham <bencunninghamiii@gmail.com>
    Subject: Wiring the LR3C-14
    > I recently purchased the LR3C-14 voltage Reg. for my RV7. > > My panel was constructed by Aerotronics and I have added a diagram > below of their schematic for my annunciator light circuit. > > I have added a sketch below of how I would like to wire the LR3, > with terminal 5 feeding the low voltage light through plug P-1-0/6, > and terminal 3 reading buss voltage downstream of the 2 amp breaker. > Since the light would be wired through a test switch, I wanted to > run this setup by everyone to see if it looked OK. Thanks, Ben


    Message 9


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    Time: 02:28:43 PM PST US
    From: "Neal George" <n8zg@mchsi.com>
    Subject: Pitot Wiring Connectors
    Bevan - Follow this link and find a table of Anderson PowerPole connectors at the bottom right of page 79... http://www.hamradio.com/web/newcat/hrocat5.pdf neal -----Original Message----- Say "power pole" style connector like those used on B&C PM alternators? Bob, I've done a quick search for "power pole". Can you supply a link to a supplier? Bevan RV7A wiring


    Message 10


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    Time: 02:42:33 PM PST US
    From: Bob White <bob@bob-white.com>
    Subject: Re: Pitot Wiring Connectors
    Hi Chuck, I may have a pitot connector that I don't need any longer. It will be Monday before I can check to see what condition it's in. If it's OK and will work for you, you are welcome to it. Bob W. On Sat, 3 Oct 2009 16:01:15 -0400 "Chuck Jensen" <cjensen@dts9000.com> wrote: > Bob, > > Thanks for the link. Yes, it looks like that connector would fit, though it is different than what was on the pitot initiatlly, which worked fine, but was apparently 'home made'. The photos show the original connectors on the old pitot in which the element had gone bad. The connectors just 'pop off'. > > The old pitot wassilver-soldered and servicing was 'not possible', but I had the good fortune to find a like Kolhsman pitot on ebay for $15; find of the decade, which I sent off to have plated, but then the connecting wires became lost. > > If I'm unable to find the bare connectors, perhaps I'll have to dig down into the green moldy stuff and cough up for the one shown in your link. > > Chuck Jensen > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert > L. Nuckolls, III > Sent: Saturday, October 03, 2009 1:44 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Pitot Wiring Connectors > > > > At 11:16 AM 10/3/2009, you wrote: > >Curious if anyone had a solution for a connector problem. I sent > >off my Velocity's sharkfin pitot for plating and when it came back, > >the two wires to the heating elements were missing. The two wires > >had female pin connectors which mate to the two male pins of the > >heating elements. The female connector slides right over the male > >pins. By memory, the pins are approx. 2-3/32nd inch in diameter and > >approximately 1/2" long. I've seen similar pins on some other > >pitots, but have not been able to find the connectors that I can > >attach termials ends to to hook up to the plane wiring. > > > >Anybody know of a source for female pin connectors that might work? > > I've never seen a heated pitot tube that did not mate > the AN3113-1 connector. That doesn't mean that yours is > the same format . . . but I suspect it is. > > The AN3115-1 is a pricey dude. ACS get about $60 for > it . . . > > http://www.aircraftspruce.com/catalog/inpages/heatedptubes2.php > > . . . and offer it under their own part number. > > Others on the 'net get as much as $100 for it. I've > contemplated building these and even have a set of > drawings and a slitting saw to do the cross-cuts in > the receptacles. See . . . > > http://www.aeroelectric.com/Pictures/Connectors/AN3115_Pitot_Tube_Heater/ > > > I built one set of pins way back when and they > would probably have worked well. After looking > at the hassles of tooling up a housing and considering > just how many connectors I might sell . . . well, let's > just say the blush was off the rose. > > If it were my airplane, I would solder pigtails onto > the extended pins and install my own connectors on the > ends of the pigtails. Say "power pole" style connector > like those used on B&C PM alternators? > > Bob . . . > > > > > > -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://roblinstores.com/


    Message 11


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    Time: 02:53:23 PM PST US
    From: Marvin Haught <handainc@madisoncounty.net>
    Subject: Re: Basic Electrical Architecture for review...
    Bob - Sent this earlier but did not get a reply. Thought I would send it again. M. Haught Bob - I'm a lurker on this site, but am in progress on a Pa22-20 project (certified). How difficult would it be to use Z-11 in a certified aircraft and get a 337 for that purpose? Has anyone done that recently? Looks perfect for the project. M. Haught Robert L. Nuckolls, III wrote: > <nuckolls.bob@aeroelectric.com> > > At 09:57 PM 9/30/2009, you wrote: >> Greetings all, >> >> I've attached an electrical architecture (in Bob's drawing style) for >> your review. It's for the Longeze I'm restoring. I'm doing the >> restoration in multiple stages. Although it had ~1000 Hrs. on it >> when I obtained it, it's been grounded since I received it. The >> attached architecture is intended to be more robust and fault >> tolerant than what was there (which I'm sure it is...) and certainly >> not worse in that regard than a TC aircraft (though not as good as a >> design with an essential bus). >> >> Down the road a bit, I intend to replace the vacuum system and >> associated instruments with electric, plus a backup alternator and an >> architecture with an essential bus. >> >> I would appreciate comments on the architecture and, specifically, on >> any unmitigated faults (especially those that would not be acceptable >> in a TC aircraft). >> >> The aircraft is VFR only. >> >> Thanks in advance, > > You appear to have a generic distribution system > and questions that go to departures from recommendations > offered in the Z-figures. > > What was it about Z-11 as depicted at: > > http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z11M.pdf > > or features depicted in other z-figures that > prompted the changes in direction? > > > Bob . . . > > --------------------------------------- > ( . . . a long habit of not thinking ) > ( a thing wrong, gives it a superficial ) > ( appearance of being right . . . ) > ( ) > ( -Thomas Paine 1776- ) > --------------------------------------- > >


    Message 12


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    Time: 06:47:02 PM PST US
    Subject: Pitot Wiring Connectors
    From: "Chuck Jensen" <cjensen@dts9000.com>
    Hi, bob, See what you have. I checked Neals suggestion and had seen if in a couple other searches. It appears to be a tension loaded flat blade that is designed to mate up with another flat blade. With both blades tensioned, the pressure is enough to form a good connection between them. A blade to pin connection might work, but that's certainly not the way it was intended. Let me know and if works, we enter some high level negotiations for it. lol Chuck Jensen Diversified Technologies 2680 Westcott Blvd Knoxville, TN 37931 Phn: 865-539-9000 x100 Cell: 865-406-9001 Fax: 865-539-9001 cjensen@dts9000.com -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Bob White Sent: Saturday, October 03, 2009 5:34 PM Subject: Re: AeroElectric-List: Pitot Wiring Connectors Hi Chuck, I may have a pitot connector that I don't need any longer. It will be Monday before I can check to see what condition it's in. If it's OK and will work for you, you are welcome to it. Bob W. On Sat, 3 Oct 2009 16:01:15 -0400 "Chuck Jensen" <cjensen@dts9000.com> wrote: > Bob, > > Thanks for the link. Yes, it looks like that connector would fit, though it is different than what was on the pitot initiatlly, which worked fine, but was apparently 'home made'. The photos show the original connectors on the old pitot in which the element had gone bad. The connectors just 'pop off'. > > The old pitot wassilver-soldered and servicing was 'not possible', but I had the good fortune to find a like Kolhsman pitot on ebay for $15; find of the decade, which I sent off to have plated, but then the connecting wires became lost. > > If I'm unable to find the bare connectors, perhaps I'll have to dig down into the green moldy stuff and cough up for the one shown in your link. > > Chuck Jensen > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert > L. Nuckolls, III > Sent: Saturday, October 03, 2009 1:44 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Pitot Wiring Connectors > > > > At 11:16 AM 10/3/2009, you wrote: > >Curious if anyone had a solution for a connector problem. I sent > >off my Velocity's sharkfin pitot for plating and when it came back, > >the two wires to the heating elements were missing. The two wires > >had female pin connectors which mate to the two male pins of the > >heating elements. The female connector slides right over the male > >pins. By memory, the pins are approx. 2-3/32nd inch in diameter and > >approximately 1/2" long. I've seen similar pins on some other > >pitots, but have not been able to find the connectors that I can > >attach termials ends to to hook up to the plane wiring. > > > >Anybody know of a source for female pin connectors that might work? > > I've never seen a heated pitot tube that did not mate > the AN3113-1 connector. That doesn't mean that yours is > the same format . . . but I suspect it is. > > The AN3115-1 is a pricey dude. ACS get about $60 for > it . . . > > http://www.aircraftspruce.com/catalog/inpages/heatedptubes2.php > > . . . and offer it under their own part number. > > Others on the 'net get as much as $100 for it. I've > contemplated building these and even have a set of > drawings and a slitting saw to do the cross-cuts in > the receptacles. See . . . > > http://www.aeroelectric.com/Pictures/Connectors/AN3115_Pitot_Tube_Heater/ > > > I built one set of pins way back when and they > would probably have worked well. After looking > at the hassles of tooling up a housing and considering > just how many connectors I might sell . . . well, let's > just say the blush was off the rose. > > If it were my airplane, I would solder pigtails onto > the extended pins and install my own connectors on the > ends of the pigtails. Say "power pole" style connector > like those used on B&C PM alternators? > > Bob . . . > > > > > > -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://roblinstores.com/


    Message 13


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    Time: 07:52:31 PM PST US
    From: Joe Dubner <jdubner@yahoo.com>
    Subject: 24V Heated Pitot
    I have a chromed AN 5812-1 14V heated pitot tube from Aero Instrument Co. and need the exact equivalent in a 12V model. Anyone care to trade? Anticipating some responses that lead to thread drift: I don't want to change the heating element. And yes, it gets hot on 12V but not hot enough to suit me. I rather just swap with someone who has a 12V model and a 24V airplane. Thanks, Joe Independence, OR http://www.mail2600.com/position




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