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Electrical Design Confusion

 
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gmvouga(at)hotmail.com
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PostPosted: Thu Apr 05, 2007 4:49 am    Post subject: Electrical Design Confusion Reply with quote
All,

I'm having some heartburn trying to figure out the best electrical system to
use. I am planning on the following type of system:

- All electric IFR setup ( Dual GRT, Garmin radio/GPS stack, Autopilot, AOA)
- Superior XP-360 w 1 lightspeed electronic ignition and 1 slick mag
- Thinking about the SD-8 alternator
- Single battery

I was looking at the Z-13/20 diagram and planning to substiture the 20A
alternator for the SD-8. Will this work? I also looked at the Z-13/8, but
it seems that it is missing some of the benefits and simplicity of the LR-3
controllers.

Any help on this would be appreciated.

Thanks,
Greg

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nuckollsr(at)cox.net
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PostPosted: Thu Apr 05, 2007 5:09 am    Post subject: Electrical Design Confusion Reply with quote
At 05:47 AM 4/5/2007 -0700, you wrote:

Quote:


All,

I'm having some heartburn trying to figure out the best electrical system
to use. I am planning on the following type of system:

- All electric IFR setup ( Dual GRT, Garmin radio/GPS stack, Autopilot, AOA)
- Superior XP-360 w 1 lightspeed electronic ignition and 1 slick mag
- Thinking about the SD-8 alternator
- Single battery

I was looking at the Z-13/20 diagram and planning to substiture the 20A
alternator for the SD-8. Will this work? I also looked at the Z-13/8,
but it seems that it is missing some of the benefits and simplicity of the
LR-3 controllers.

Any help on this would be appreciated.

The vast majority of OBAM aircraft flying would be
just fine using Z-11 taking advantage of the reliability
of modern alternators and RG batteries combined with
the e-bus alternate feed philosophy. IF you don't plan
to have a vacuum system, then plugging the open hole
on the back of the engine with an SD-8 is a good thing to
do and you step up to Z-13/8.

In Z-13/20, the aux alternator IS an SD-20 . . . but
what makes you think you'll NEED this kind of auxiliary
energy? Also, be aware that the depiction of any particular
brand of main alternator and its associated controller
is NOT carved in stone. The Z-figures are to illustrate
architectures and should not be interpreted to recommend
specific hardware, breaker-fuse sizes, wire sizes or what
gizmo runs from which bus. These are things you need to
decide based on the specifics of your hardware selections
and operating philosophy.

From what you've described I'm betting that Z-13/8
is going to meet all your needs with a minimum of weight
and cost.

Bob . . .

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gmvouga(at)hotmail.com
Guest
PostPosted: Thu Apr 05, 2007 8:29 am    Post subject: Electrical Design Confusion Reply with quote
Bob,

Thanks for the information. This is helping... However, i have a couple
more questions.

1. The LR-3 alternator controller looks like a nice option and simplifies
things (crowbar, indicator light, regulator all-in-one) for the main
alternator. Is there any reason, other than cost, not to use this?

2. For the SD-8 it would be nice to have a indicator light or gage to make
sure it's functioning properly. I could wire this into the circuit as well,
but I still need regulator and crowbar OV. So... Is there any reason not
to use the LR-3 other than cost. In Z-13/8 it simply states "voltage
Regulator." Is there a specific model that you recommend?

As you might already be able to figure out, I'm a little electron
challenged. So forgive me if any of these questions seem a somewhat basic.
I have actually read the AeroElectric Connection, but I'm still a little
confused. I'm really just looking for a safe, simple, wiring archetecture
that will fit my equipment (Avionics and engine) choices. Saving a few
pennies would be nice, but at this point i would pay a few more bucks to
make it simple. The This is really the reason that I was thinking of just
trading the SD-8 for the 20 amp alternator in Z-13/20. I don't think I need
the 20A alternator, and the SD-8 will add the safety that I am looking for
in my all electric system. Is there any reason not to do this?

Thanks in advance,
Greg


Quote:
From: "Robert L. Nuckolls, III" <nuckollsr(at)cox.net>
Reply-To: aeroelectric-list(at)matronics.com
To: aeroelectric-list(at)matronics.com
Subject: Re: Electrical Design Confusion
Date: Thu, 05 Apr 2007 09:08:50 -0500


<nuckollsr(at)cox.net>

At 05:47 AM 4/5/2007 -0700, you wrote:

>
><gmvouga(at)hotmail.com>
>
>All,
>
>I'm having some heartburn trying to figure out the best electrical system
>to use. I am planning on the following type of system:
>
>- All electric IFR setup ( Dual GRT, Garmin radio/GPS stack, Autopilot,
>AOA)
>- Superior XP-360 w 1 lightspeed electronic ignition and 1 slick mag
>- Thinking about the SD-8 alternator
>- Single battery
>
>I was looking at the Z-13/20 diagram and planning to substiture the 20A
>alternator for the SD-8. Will this work? I also looked at the Z-13/8,
>but it seems that it is missing some of the benefits and simplicity of the
>LR-3 controllers.
>
>Any help on this would be appreciated.

The vast majority of OBAM aircraft flying would be
just fine using Z-11 taking advantage of the reliability
of modern alternators and RG batteries combined with
the e-bus alternate feed philosophy. IF you don't plan
to have a vacuum system, then plugging the open hole
on the back of the engine with an SD-8 is a good thing to
do and you step up to Z-13/8.

In Z-13/20, the aux alternator IS an SD-20 . . . but
what makes you think you'll NEED this kind of auxiliary
energy? Also, be aware that the depiction of any particular
brand of main alternator and its associated controller
is NOT carved in stone. The Z-figures are to illustrate
architectures and should not be interpreted to recommend
specific hardware, breaker-fuse sizes, wire sizes or what
gizmo runs from which bus. These are things you need to
decide based on the specifics of your hardware selections
and operating philosophy.

From what you've described I'm betting that Z-13/8
is going to meet all your needs with a minimum of weight
and cost.

Bob . . .


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Back to top
nuckollsr(at)cox.net
Guest
PostPosted: Thu Apr 05, 2007 4:21 pm    Post subject: Electrical Design Confusion Reply with quote
At 09:24 AM 4/5/2007 -0700, you wrote:

Quote:


Bob,

Thanks for the information. This is helping... However, i have a couple
more questions.

1. The LR-3 alternator controller looks like a nice option and simplifies
things (crowbar, indicator light, regulator all-in-one) for the main
alternator. Is there any reason, other than cost, not to use this?

The voltage regulator for an SD-8 is unique to that product and comes
with it. You can't use an LR-3 with the SD-8.
Quote:
2. For the SD-8 it would be nice to have a indicator light or gage to
make sure it's functioning properly. I could wire this into the circuit
as well, but I still need regulator and crowbar OV. So... Is there any
reason not to use the LR-3 other than cost. In Z-13/8 it simply states
"voltage Regulator." Is there a specific model that you recommend?

The functionality indicator for ALL alternators is active
notification of low volage . . . i.e. flash a light
if the bus voltage is less than 13.0 volts. OV protection
for the SD-8 is illustrated in Z-13/8
Quote:
As you might already be able to figure out, I'm a little electron
challenged. So forgive me if any of these questions seem a somewhat basic.
I have actually read the AeroElectric Connection, but I'm still a little
confused. I'm really just looking for a safe, simple, wiring archetecture
that will fit my equipment (Avionics and engine) choices. Saving a few
pennies would be nice, but at this point i would pay a few more bucks to
make it simple. The This is really the reason that I was thinking of just
trading the SD-8 for the 20 amp alternator in Z-13/20. I don't think I
need the 20A alternator, and the SD-8 will add the safety that I am
looking for in my all electric system. Is there any reason not to do this?

Yes. Too heavy, too expensive and overkill for what you need.
Z-13/8 as published is all you're going to ever need and
more.

Bob . . .

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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gmvouga(at)hotmail.com
Guest
PostPosted: Fri Apr 06, 2007 6:09 am    Post subject: Electrical Design Confusion Reply with quote
Bob,

Thanks for your input. Looks like Z-13/8 is the direction that I'll be
going.

Greg
Quote:
From: "Robert L. Nuckolls, III" <nuckollsr(at)cox.net>
Reply-To: aeroelectric-list(at)matronics.com
To: aeroelectric-list(at)matronics.com
Subject: Re: Electrical Design Confusion
Date: Thu, 05 Apr 2007 20:20:38 -0500


<nuckollsr(at)cox.net>

At 09:24 AM 4/5/2007 -0700, you wrote:

>
><gmvouga(at)hotmail.com>
>
>Bob,
>
>Thanks for the information. This is helping... However, i have a couple
>more questions.
>
>1. The LR-3 alternator controller looks like a nice option and simplifies
>things (crowbar, indicator light, regulator all-in-one) for the main
>alternator. Is there any reason, other than cost, not to use this?

The voltage regulator for an SD-8 is unique to that product and comes
with it. You can't use an LR-3 with the SD-8.
>2. For the SD-8 it would be nice to have a indicator light or gage to
>make sure it's functioning properly. I could wire this into the circuit
>as well, but I still need regulator and crowbar OV. So... Is there any
>reason not to use the LR-3 other than cost. In Z-13/8 it simply states
>"voltage Regulator." Is there a specific model that you recommend?

The functionality indicator for ALL alternators is active
notification of low volage . . . i.e. flash a light
if the bus voltage is less than 13.0 volts. OV protection
for the SD-8 is illustrated in Z-13/8
>As you might already be able to figure out, I'm a little electron
>challenged. So forgive me if any of these questions seem a somewhat
>basic.
>I have actually read the AeroElectric Connection, but I'm still a little
>confused. I'm really just looking for a safe, simple, wiring archetecture
>that will fit my equipment (Avionics and engine) choices. Saving a few
>pennies would be nice, but at this point i would pay a few more bucks to
>make it simple. The This is really the reason that I was thinking of just
>trading the SD-8 for the 20 amp alternator in Z-13/20. I don't think I
>need the 20A alternator, and the SD-8 will add the safety that I am
>looking for in my all electric system. Is there any reason not to do
>this?

Yes. Too heavy, too expensive and overkill for what you need.
Z-13/8 as published is all you're going to ever need and
more.

Bob . . .


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