Today's Message Index:
----------------------
1. 02:24 AM - Re: Common questions (Neville Kilford)
2. 05:53 AM - Re: Broken S708-1 (Billie Lamb)
3. 07:53 AM - Re: Broken S708-1 (Larry Bowen)
4. 07:57 AM - Re: Molex Pins (Michael Ashura)
5. 08:07 AM - Re: Garmin GPS 400 harness advice (Larry Bowen)
6. 08:34 AM - Re: Re: EI Install - Firewall Penetration (rwilliams)
7. 10:11 AM - Electrical Problems Check List (Rick Fogerson)
8. 10:21 AM - Re: Broken S708-1 (Robert L. Nuckolls, III)
9. 10:23 AM - Re: Book available? (Robert L. Nuckolls, III)
10. 10:39 AM - Re: Re: EI Install - Firewall Penetration (Robert L. Nuckolls, III)
11. 01:13 PM - Re: Electrical Problems Check List (John Schroeder)
12. 01:32 PM - Re: Electrical Problems Check List (Robert L. Nuckolls, III)
13. 01:37 PM - Re: Re: EI Install - Firewall Penetration (Billie Lamb)
14. 01:52 PM - Re: Master Bus Wire Size (Robert L. Nuckolls, III)
15. 02:14 PM - Re: Electrical Problems Check List (Neville Kilford)
16. 02:32 PM - Re: Master Bus Wire Size (Neville Kilford)
17. 03:18 PM - Re: Electrical Problems Check List (John Schroeder)
18. 03:18 PM - Re: Electrical Problems Check List (Robert McCallum)
19. 07:22 PM - Bob - Substitution of Electrical Parts (Rick Fogerson)
20. 08:07 PM - Re: Electrical Problems Check List (Robert L. Nuckolls, III)
21. 09:38 PM - Re: Re: EI Install - Firewall Penetration (Jordan Grant)
Message 1
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| Subject: | Re: Common questions |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
I'll second that! Probably the best 20 I ever spent. I was really
stumbling around with electrical systems, and would have churned out another
50-year-old electrical plan based on the information I could find. Now at
least I feel like I've considered a wide range of factors and have created a
much better job, and one that I understand completely.
Nev
--
Jodel D150 in progress
UK
----- Original Message -----
From: "Phil Birkelbach" <phil@petrasoft.net>
Subject: Re: AeroElectric-List: Common questions
> --> AeroElectric-List message posted by: "Phil Birkelbach"
<phil@petrasoft.net>
>
> There is a FAQ. It is called 'The AeroElectric Connection' and it can be
> purchased from Bob himself or the Builders Bookstore.
>
> www.aeroelectric.com
> http://www.buildersbooks.com/aeroelectric_connection.htm?38,57
>
> I do electrical designs for a living and I learned a LOT from this book.
If
> you are planning to wire your own airplane then you MUST buy this book. At
> $31 it is a wash compared to all the grief that you will save.
>
> Besides, Bob spends a bunch of time on this list answering our questions
and
> asks nothing in return. Go buy the book.
>
> Godspeed,
>
> Phil Birkelbach - Houston Texas
> RV-7 N727WB (Reserved) - Canopy
> http://www.myrv7.com
>
> ----- Original Message -----
> From: "rwilliams" <rwilliams@C1ama.net>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: Common questions
>
>
> > --> AeroElectric-List message posted by: "rwilliams"
<rwilliams@C1ama.net>
> >
> > A Nuckoll's online FAQ is a superb idea!
> >
> >
>
Message 2
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| Subject: | Re: Broken S708-1 |
--> AeroElectric-List message posted by: "Billie Lamb" <N254BL@cfl.rr.com>
I tightened mine with a wrench and no problem. I'd suggest you had a factory
defect and would call B&C. They will probably replace it.
Bill Lamb
----- Original Message -----
From: "Werner Schneider" <wernerschneider@compuserve.com>
Subject: Re: AeroElectric-List: Broken S708-1
> --> AeroElectric-List message posted by: "Werner Schneider"
<wernerschneider@compuserve.com>
>
> I'm using four of them without any problems?!
> ----- Original Message -----
> From: <drew.schumann@us.army.mil>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: Broken S708-1
>
>
> > --> AeroElectric-List message posted by: drew.schumann@us.army.mil
> >
> > I'm glad I'm not the only one. Same thing on a Piper Archer a few
months
> ago, for me!
> >
> > Drew
> >
> > ----- Original Message -----
> > From: Dan Checkoway <dan@rvproject.com>
> > Date: Wednesday, July 16, 2003 5:23 am
> > Subject: AeroElectric-List: Broken S708-1
> >
> > > --> AeroElectric-List message posted by: "Dan Checkoway"
> > > <dan@rvproject.com>
> > > I bought an S708-1 sub-miniature push button from B&C about a
> > > month ago with
> > > the intent of using it as a copilot's PTT switch. Today I finally
> > > wired it
> > > up, but when I went to install it the thing broke!
> > >
> > > I was tightening the nut with a 7/32" socket between my FINGERS,
> > > not even
> > > using a wrench, just twisting the socket between my thumb and
> > > index finger.
> > > The barrel just snapped as soon as it got tight. I couldn't
> > > possibly have
> > > put that much torque on the thing.
> > >
> > > The threaded barrel literally split on a thread...it didn't separate,
> > > though, just kind of split about 3/4 of the way around. I
> > > couldn't get the
> > > nut off, so I had to cut it out of there with a pair of wire cutters.
> > >
> > > I was surprised at how cheap this switch ended up being. I always
> > > think of
> > > B&C as selling top-quality stuff!
> > >
> > > )_( Dan
> > > RV-7 N714D
> > > http://www.rvproject.com
> > >
> > >
> > > _-
> > > _-
> > > _-
> > > _-
> > > ======================================================================
> > >
> > >
> > >
> > >
> >
> >
>
>
Message 3
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| Subject: | Re: Broken S708-1 |
--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
I'm using the same switch for front and rear baggage lights. Yes, they
are a fragile. I hope they last........
-
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
Dan Checkoway said:
> --> AeroElectric-List message posted by: "Dan Checkoway"
> <dan@rvproject.com>
>
> I bought an S708-1 sub-miniature push button from B&C about a month ago
> with
> the intent of using it as a copilot's PTT switch. Today I finally wired
> it
> up, but when I went to install it the thing broke!
>
> I was tightening the nut with a 7/32" socket between my FINGERS, not even
> using a wrench, just twisting the socket between my thumb and index
> finger.
> The barrel just snapped as soon as it got tight. I couldn't possibly have
> put that much torque on the thing.
>
> The threaded barrel literally split on a thread...it didn't separate,
> though, just kind of split about 3/4 of the way around. I couldn't get
> the
> nut off, so I had to cut it out of there with a pair of wire cutters.
>
> I was surprised at how cheap this switch ended up being. I always think
> of
> B&C as selling top-quality stuff!
>
> )_( Dan
> RV-7 N714D
> http://www.rvproject.com
Message 4
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--> AeroElectric-List message posted by: "Michael Ashura" <ashuramj@hotmail.com>
Jack
How much would a pin cost? Did you buy a TXP?
Mike
From: frequent flyer <JDHCV@YAHOO.COM>
Subject: AeroElectric-List: Molex Pins
-- AeroElectric-List message posted by: frequent flyer <JDHCV@YAHOO.COM>
Hi, I hav3e never posted to this very valuable list
but I lurk a lot and I need 18 of the Molex pins for
my AT-50A Narco transponder. Maybe we could get enough
people that need pins to get an order together.
Jack
__________________________________
Message 5
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| Subject: | Re: Garmin GPS 400 harness advice |
--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
Ditto. It made easy work of all the pins needed for my TruTrak AP and
Inifinity stick grip.
-
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
Robert L. Nuckolls, III said:
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <bob.nuckolls@cox.net>
>
> At 02:42 PM 7/15/2003 +0200, you wrote:
>>--> AeroElectric-List message posted by: "Gilles.Thesee"
>><Gilles.Thesee@ac-grenoble.fr>
>>
>>Hi Bob and all,
>>
>>Our GPS 400 arrived last week, and the rack is now installed in the
>>airplane.
>>My intention was to fabricate the connecting harness.
>>But the the high density 78 pin connector included in the box has tiny
>>machined gold contats, and I am concerned my 4-indent B&C crimper might
>> not
>>do.
>
> I've used the B&C crimper on the hi-density d-sub pins
> with great success.
>
> Bob . . .
Message 6
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "rwilliams" <rwilliams@C1ama.net>
DO NOT ARCHIVE
Bob:
Back when I was really active with computers-when a fast clock speed was
4.77mHz-I think there were d-sub connectors made just for passing cables
through sheet metal (in this case, cases). Am I imagining things?
Admittedly, this would add an additional junction, but it sure might
simplify wiring in some situations, an perhaps alleviate someone's anxiety
about passing a cable through a firewall.
Bob Williams
Message 7
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| Subject: | Electrical Problems Check List |
--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
Hi Bob and Listers,
I'm making up a check list and want to include electrical problems. Assume LR3-C
voltage reg, dual batterys (oldest changed annually), and dual E.I. Does anyone
see a problem with the following list and/or would include anything more?
1) Indication: Low Voltage Light - ON, Field CB - IN
Likely Cause: Alternator failing
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest. airport
2) Indication: Low Voltage Light - ON, Field CB - POPPED
Likely Cause: Voltage Reg failing
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest. airport
3) Indication: Smoke and/or sparks in cockpit
Likely Cause: Wiring short
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF
If smoke clears, land at closest airport
If smoke doesn't clear, Essential Bus Sw - OFF, Land at closest airport,
try turning on Essential Bus
items one at a time
4) Indication: Field CB - POPPED
Likely Cause: nuisance trip
Action: Field CB - RESET, Proceed to dest. airport
Message 8
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| Subject: | Re: Broken S708-1 |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>I just wanted to raise the issue in case it's something I did -- sounds like
>I over-torqued it, even with my fingers. But even so, the switch doesn't
>come with a lock washer, nor did the barrel seem long enough to get a lock
>washer on there. Radio Smack's version does come with a lock washer (and a
>longer, fatter barrel).
Since most lock washers aren't and given the a detraction to
appearance on a panel control, consider "thread locking"
this or any other control. Locktite will be happy to sell
you various locking compounds with differing resistance
to rotation . . . or just dab some RTV sealant into
the male threads before you mount the part.
The RTV is a fair adhesive but low shear strength.
It will certainly prevent free nut rotation with vibration
as a stimulus . . . but never grip so hard that the
joint is difficult to break.
When I've mounted the S-708 on a yoke, RTV combined
with just enough torque to snug the joint has proven
satsifactory.
Bob . . .
Message 9
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| Subject: | Re: Book available? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:04 PM 7/15/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "ted scott" <teds532@bellsouth.net>
>
>Thanks ,Bob. Do you have a book on electrical systems that I could buy.
Sure. See the website at http://www.aeroelectric.com
Not only is there a book but a couple hundred megabytes
of additional support stuff you can download.
Bob . . .
Message 10
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:34 AM 7/16/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "rwilliams" <rwilliams@C1ama.net>
>
>DO NOT ARCHIVE
>
>Bob:
>
>Back when I was really active with computers-when a fast clock speed was
>4.77mHz-I think there were d-sub connectors made just for passing cables
>through sheet metal (in this case, cases). Am I imagining things?
>
>Admittedly, this would add an additional junction, but it sure might
>simplify wiring in some situations, an perhaps alleviate someone's anxiety
>about passing a cable through a firewall.
Yeah . . . If I have the right image of your words, it's
a double ended connector. If both ends are same gender, they
call 'em "gender changers" . . . if different then they're
a bulkhead feed-through.
I've seen them in catalogs but not recently. You could
make them by backing an ECB version of a connector to
a solder version and soldering them together. I'm certain
that you wouldn't want to use these for a firewall penetration.
Not nearly robust enough with respect to fire resistance.
Bob . . .
Message 11
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
Rick -
With one alternator, I'd for darned sure land at the nearest suitable
airport on both 1) & 2)!
For 3), I assume that you have one EI on each battery buss. If this is
true, I'd get both Master and Essential buss switch off first and head for
the nearest airport. If you absolutely need a piece of equipment on, and
assuming that you have that on the Essential buss, put that switch on and
still head for the airport.
John Schroeder
>
> 1) Indication: Low Voltage Light - ON, Field CB - IN
> Likely Cause: Alternator failing
> Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest.
> airport
>
> 2) Indication: Low Voltage Light - ON, Field CB - POPPED
> Likely Cause: Voltage Reg failing
> Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest.
> airport
>
> 3) Indication: Smoke and/or sparks in cockpit
> Likely Cause: Wiring short
> Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF
> If smoke clears, land at closest airport
> If smoke doesn't clear, Essential Bus Sw - OFF, Land at closest airport,
> try turning on Essential Bus
> items one at a time
>
> 4) Indication: Field CB - POPPED
> Likely Cause: nuisance trip
> Action: Field CB - RESET, Proceed to dest. airport
Message 12
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 04:12 PM 7/16/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: John Schroeder
><jschroeder@perigee.net>
>
>Rick -
>
>With one alternator, I'd for darned sure land at the nearest suitable
>airport on both 1) & 2)!
>
>For 3), I assume that you have one EI on each battery buss. If this is
>true, I'd get both Master and Essential buss switch off first and head for
>the nearest airport. If you absolutely need a piece of equipment on, and
>assuming that you have that on the Essential buss, put that switch on and
>still head for the airport.
>
>John Schroeder
Why would you do this if you KNOW that you have enough
battery energy aboard to allow continued flight until
AFTER fuel is exhausted?
Bob . . .
Message 13
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Billie Lamb" <N254BL@cfl.rr.com>
I simply mounted my box on the firewall with cooling tube. If that sucker
isn't hardy enough to survive there, then I'll try something else but don't
have room for it in the cockpit and didn't want it there anyway. This is on
a Mustang II.
Bill Lamb
----- Original Message -----
From: "Dan Checkoway" <dan@rvproject.com>
Subject: Re: AeroElectric-List: Re: EI Install - Firewall Penetration
> --> AeroElectric-List message posted by: "Dan Checkoway"
<dan@rvproject.com>
>
> My feeling is "wassabigdeal?!" I'm not ABOUT to cut a 1" hole in my
> firewall when I could get away with a much smaller pass-through just for
the
> wire. I'll be chopping my connector off.
>
> http://rvproject.com/images/2003/20030713_lightspeed_harness.jpg
>
> That's a photo of what the 15-pin connector looks like when you take the
> housing off, as it comes from LightSpeed. I don't understand why you
> wouldn't just order a new crimp pin connector from Mouser (or the like)
for
> *less than a buck*, cut the wires off one by one and crimp on D-subs and
> insert 'em into the new connector. Don't even need to label if you do it
> one wire at a time. But I plan on cutting the existing connector off,
> running the wire through a small pass-through (along with the bundle of
> engine transducer/sensor wires, but not with the coil wires), and then
> crimping on the new connector once the wire passes aft of the firewall.
>
> http://rvproject.com/images/2003/20030713_lightspeed_schematic.jpg
>
> That's a crappy photo of the schematic that comes with the LightSpeed
> system...but you've got a reference if you get stuck. I understand why
> Klaus doesn't want to support myriad problems when people cut off his
> connector and screw up installing a new one, but I also don't think it's
> that complicated that we should consider gouging our firewalls
> unnecessarily.
>
> Hopefully sometime in the next few weeks I'll wrap up the firewall forward
> wiring on my RV-7, so I'll have pics on the site for reference.
>
> By the way, the 15-pin connector housings are available from Mouser...part
#
> 156-1415 (receptacle) or 156-1416 (plug), and the crimp pin/socket
contacts
> are on page 603 of the online catalog as well.
>
> http://www.mouser.com/catalog/614/603.pdf
>
> )_( Dan
> RV-7 N714D
> http://www.rvproject.com
>
> ----- Original Message -----
> From: "Tinne maha" <tinnemaha@hotmail.com>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: Re: EI Install - Firewall Penetration
>
>
> > --> AeroElectric-List message posted by: "Tinne maha"
> <tinnemaha@hotmail.com>
> >
> >
> > Yes, Bob. Your presumption is correct. LSE supplies a pre-wired harness
> with a15 pin connector on one end the direct crank sensor cirquit board
on
> the other. The 15 pin connector hooks up to the control module which is
> recommended to be installed behind the firewall. A minimum of 3 inches
away
> from these input wires the installer is supposed to route 2 seaparate RG58
> coaxial cables thatconnect to the 2ignition coils (assuming a 4 cylinder
> engine)
> >
> >
> > LSE cannot recommend cutting re-splicing/soldering the input wires to
get
> them through the firewall so they recommend drilling a hole just large
> enough to get the bare minimum of the 15 pin connector (cover removed)
> through the firewall.I could do that just find a mondo grommet that I'd
> have tocut a radius in but itkinda bugs me. I think Ilike your d-sub idea
> but I don't know much at all about them. Seen the pictures on the tools
page
> but that's it. I'm pretty sure when I say 15 pin connector it is a d-sub
but
> I don't know for sure I certainly don't know if they are removable but I
> will research that pathas soon as time allows.
> >
> >
> > Unfortunately I'm having to work out of town for a week and wont have
> internet access until Saturday the 19th. This is my last post until then
but
> I look forward to your response.
> >
> >
> > Thanks,
> >
> >
> > Grant
> >
> >
> > From: "Robert L. Nuckolls, III" <BOB.NUCKOLLS@COX.NET>
> > To: aeroelectric-list@matronics.com
> > Subject: AeroElectric-List: Re: EI Install - Firewall Penetration
> > Date: Sun, 13 Jul 2003 15:43:21 -0500
> >
> > -- AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <BOB.NUCKOLLS@COX.NET>
> >
> > At 03:21 PM 7/13/2003 -0500, you wrote:
> > -- AeroElectric-List message posted by: Jeff Point
> <JPOINT@MINDSPRING.COM>
> >
> > I just installed this as well. I decided that it would be less work to
> > drill a 1 inch hole in the firewall than to cut/ splice the wiring. A
> > good 1 inch hole saw works well for this. I used a stainless firewall
> > shield with an asbestos washer to seal the opening. On the plus side,
> > you can run lots of other wires through this big hole (but not the LSE
> > high voltage wires!
> >
> >
> > Do I presume correctly that there is a manufacturer supplied
> > harness with connector installed that needs to go through
> > the firewall? I think I would replace the connector with
> > one that uses removable pins . . . like a d-sub. Before you
> > install pins in new connector, route the harness through
> > a smaller hole.
> >
> > What kind of high voltage wires need to come through the
> > firewall?
> >
> > Bob . . .
> >
> >
>
>
Message 14
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| Subject: | Re: Master Bus Wire Size |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 04:50 PM 7/15/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Phil Birkelbach"
><phil@petrasoft.net>
>
>Howdy all,
>
>I have modified the 'All Electric Airplane on a Budget' distribution diagram
>to include the OV protection on the internally regulated alternator. I have
>two questions...
>
>One does anybody see anything that will cause me any grief? and two, I
>noticed that I am missing the wire size between the main bus and the battery
>contactor. I considered 4AWG just to be on the safe side but I was
>wondering if there was any need to go with wire that big or if I could get
>away with something smaller. I am trying to build the system around a 40A
>alternator but with the capability to go to 60A in the future if I decide
>to.
>
>Here is a *.pdf of the system so far...
>
>http://www.myrv7.com/drawings/727WB-001.pdf
Phil, just noticed a small problem with the diagram you
published . . .
Feedwire to the alternator b-lead disconnect contactor
coil is the (+) supply to the contactor. The OTHER end
should, therefore, go to ground and not to the (+) power
that resides on the fat terminal. The diode across the coil
needs to be reversed also.
Bob . . .
Message 15
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
John,
I tthink that the best characteristic of Bob's architectures is that there
would always be a known reserve available for the eseential bus, that it
would be enough to continue to destination, and that it would continue to
drive enough items to continue the flight safely.
This relies on regular battery testing, of course, but a draw of, say, 5A,
for a few essential items, on even a small 17Ah battery should last long
enough to get to most destinations without diverting.
I'd have no problem with running off an essential bus until destination, even
if major parts of the electrical system had failed, because there's so little
between the battery and essential bus,
Cheers.
Nev
----- Original Message -----
From: "John Schroeder" <jschroeder@perigee.net>
Subject: Re: AeroElectric-List: Electrical Problems Check List
> --> AeroElectric-List message posted by: John Schroeder
<jschroeder@perigee.net>
>
> Rick -
>
> With one alternator, I'd for darned sure land at the nearest suitable
> airport on both 1) & 2)!
>
> For 3), I assume that you have one EI on each battery buss. If this is
> true, I'd get both Master and Essential buss switch off first and head for
> the nearest airport. If you absolutely need a piece of equipment on, and
> assuming that you have that on the Essential buss, put that switch on and
> still head for the airport.
>
> John Schroeder
>
>
> >
> > 1) Indication: Low Voltage Light - ON, Field CB - IN
> > Likely Cause: Alternator failing
> > Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest.
> > airport
> >
> > 2) Indication: Low Voltage Light - ON, Field CB - POPPED
> > Likely Cause: Voltage Reg failing
> > Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest.
> > airport
> >
> > 3) Indication: Smoke and/or sparks in cockpit
> > Likely Cause: Wiring short
> > Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF
> > If smoke clears, land at closest airport
> > If smoke doesn't clear, Essential Bus Sw - OFF, Land at closest airport,
> > try turning on Essential Bus
> > items one at a time
> >
> > 4) Indication: Field CB - POPPED
> > Likely Cause: nuisance trip
> > Action: Field CB - RESET, Proceed to dest. airport
>
>
Message 16
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| Subject: | Re: Master Bus Wire Size |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
Phil,
There's one thing I don't understand -- what is the purpose of the fuselink
between the battery bus and essential bus, when there's a fuse there too?
Have I missed something?
Thanks.
Nev
--
Jodel D150 in progress
UK
----- Original Message -----
From: "Phil Birkelbach" <phil@petrasoft.net>
Subject: AeroElectric-List: Master Bus Wire Size
> --> AeroElectric-List message posted by: "Phil Birkelbach"
<phil@petrasoft.net>
>
> Howdy all,
>
> I have modified the 'All Electric Airplane on a Budget' distribution
diagram
> to include the OV protection on the internally regulated alternator. I
have
> two questions...
>
> One does anybody see anything that will cause me any grief? and two, I
> noticed that I am missing the wire size between the main bus and the
battery
> contactor. I considered 4AWG just to be on the safe side but I was
> wondering if there was any need to go with wire that big or if I could get
> away with something smaller. I am trying to build the system around a 40A
> alternator but with the capability to go to 60A in the future if I decide
> to.
>
> Here is a *.pdf of the system so far...
>
> http://www.myrv7.com/drawings/727WB-001.pdf
>
> Godspeed,
>
> Phil Birkelbach - Houston Texas
> RV-7 N727WB (Reserved) - Canopy
> http://www.myrv7.com
>
>
Message 17
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
Bob -
Personal preference, my friend, personal preference. We just finished a
round of discussion on this very topic on the Lancair Mail List and I still
prefer to take an all electric aircraft with an electically dependent
engine to the nearest safe haven. If there are electrons left over, then
I'm happy.
Cheers,
John
>> Rick -
>>
>> With one alternator, I'd for darned sure land at the nearest suitable
>> airport on both 1) & 2)!
>>
>> For 3), I assume that you have one EI on each battery buss. If this is
>> true, I'd get both Master and Essential buss switch off first and head
>> for
>> the nearest airport. If you absolutely need a piece of equipment on, and
>> assuming that you have that on the Essential buss, put that switch on
>> and
>> still head for the airport.
>>
>> John Schroeder
>
> Why would you do this if you KNOW that you have enough
> battery energy aboard to allow continued flight until
> AFTER fuel is exhausted?
>
> Bob . . .
>
>
--
Message 18
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca>
John Schroeder wrote:
>--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
>
>Rick -
>
>With one alternator, I'd for darned sure land at the nearest suitable
>airport on both 1) & 2)!
>
>For 3), I assume that you have one EI on each battery buss. If this is
>true, I'd get both Master and Essential buss switch off first and head for
>the nearest airport. If you absolutely need a piece of equipment on, and
>assuming that you have that on the Essential buss, put that switch on and
>still head for the airport.
>
>John Schroeder
>
>
>
John;
Why would this be a problem?? I was under the impression that the whole
reason for following the AeroElectric architecture was that under any
conceivable circumstance you simply switched to the "essential" mode and
continued your flight to destination secure in the knowledge that you
have more electrical reserve than fuel.
Bob McC
Message 19
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| Subject: | Bob - Substitution of Electrical Parts |
--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
Hi Bob,
I went to Radio Shack today and based on inventory, I had to substitute a few items
for the test adaptor. Are the substituted items ok?
1) 274-1569 Size M Coaxial DC power plug in place of 274-1573
2) 274-1563 Size M Coaxial DC power jack in place of 274-1576
3) 271-153A 1K Ohm, 1 watt resistor in place of 1K Ohm, 1/2 watt resistor
4) Is the direction of the resistor important (color bands go brown, black, red,
and gold in order)?
5) Can I assume that you have no problem with anything I said below Re the check
list?
I'm making up a check list and want to include electrical problems. Assume LR3-C
voltage reg, dual 17ah batterys (oldest changed annually), and dual E.I.
Does anyone see a problem with the following list and/or would include anything
more?
1) Indication: Low Voltage Light - ON, Field CB - IN
Likely Cause: Alternator failing
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest. airport
2) Indication: Low Voltage Light - ON, Field CB - POPPED
Likely Cause: Voltage Reg failing
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF, Proceed to dest. airport
3) Indication: Smoke and/or sparks in cockpit
Likely Cause: Wiring short
Action: Essential Bus Sw - ON, Master Alt/Bat Sw - OFF
If smoke clears, land at closest airport
If smoke doesn't clear, Essential Bus Sw - OFF, Land at closest
airport, try turning on Essential Bus
items one at a time
4) Indication: Field CB - POPPED
Likely Cause: nuisance trip
Action: Field CB - RESET, Proceed to dest. airport
Do not archive
thanks, Rick Fogerson
RV3 electrical
Boise, ID
Message 20
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| Subject: | Re: Electrical Problems Check List |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:15 PM 7/16/2003 +0100, you wrote:
>--> AeroElectric-List message posted by: "Neville Kilford"
><nkilford@etravel.org>
>
>John,
>
>I tthink that the best characteristic of Bob's architectures is that there
>would always be a known reserve available for the eseential bus, that it
>would be enough to continue to destination, and that it would continue to
>drive enough items to continue the flight safely.
>
>This relies on regular battery testing,
or periodic maintenance in the form of new battery
every year. I one runs the very reasonable 17 a.h.
RG battery, it can be depended upon to deliver
a lion's share of rated capacity at any time in
first year . . .
> of course, but a draw of, say, 5A,
>for a few essential items, on even a small 17Ah battery should last long
>enough to get to most destinations without diverting.
Many endurance bus loads are as low as 2A while in
the en route phase of flight . . .
>I'd have no problem with running off an essential bus until destination, even
>if major parts of the electrical system had failed, because there's so little
>between the battery and essential bus . . .
But of course . . .
I rent airplanes. I have no personal knowledge of the maintenance
history of any airplane I rent except that it passed a 100 hour
inspection not too long ago. None the less, when I walk up to a
rental, it matters not if ANY of the electrical stuff on the
panel is working except perhaps as a dispatch item . . . once
airborne, the goodies in my flight bag will get me where I need
to go if nothing on the panel is working. That is the sad lot
of dealing with machines offered to us from the certified
world . . . See chapter 17 at:
http://www.aeroelectric.com/articles/Rev9/ch17-9.pdf
In your OBAM aircraft, what practical limits on system design
and operation prevent you from having an en route endurance
of electrical equipment that is equal to or greater than
fuel endurance? I will suggest there are none. If we can
demonstrate that suggestion to be true, then there is yet
another point in favor of selling your PiBeCesMo and building
a nice RV or Kitfox.
Bob . . .
Message 21
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Jordan Grant" <jgrant@sw.rr.com>
The latest Kitplanes has an article that details an installation of the
LSE Electronic Ignition. They just put the box on the engine side of the
firewall. That eliminates the penetration altogether. I was thinking
about doing it that way.
Jordan Grant
RV-6 FWF
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