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nuckolls.bob(at)aeroelect
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 Posted: Sat Jul 25, 2020 5:55 pm Post subject: RV10 primary elec sys wiring |
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At 09:57 AM 7/23/2020, you wrote:
Good day Dear Mr.Nuckolls,
First, i really happy that i've met your book and web site with plenty of extra useful information.I am aircraft maintenance engineer (mostly Boeing type rated), have practical and theoretical skills. but realized that need some more theoretical researches for better elec system knowledge.
Those fundamentals will serve you well in your
new aviation endeavors. Your sense of craftsmanship
and knowledge of 'how the other guys do it' will
be useful.
Recently friend of mine asked me to help with his RV-10 electrical and avionics hookup. Most of works are done except all wiring work. I spent many hours doing research and stuck...we have perhaps unusual config with one regular battery(RG-25XC)with Batteryminder charging kit BM-AIK2A, just one primary alternator Plane Power 99-1012 with built-in voltage regulator (unfortunately) and small cmart backup battery TCW IBBA-12v-6AH. Ignition - Champion slick magnetos (6393 and 6350) , lefthand one with SS1001 booster.
You don't mention how this airplane will be used.
Day VFR, Day/Nite VFR, 'hard' IFR, extended flight
over unfriendly terrain? What avionics are anticipated?
Which devices will exploit the back-up battery?
Despite I am professional avionic I am really stuck and frustrated in myself...
You've come to the right place. I've taken the liberty
of signing you up as a participant on the AeroElectric-List.
We are a 'members only' consortium of aviation enthusiasts with
broad range of experience and skills. We strive for elegant
solutions based on good science.
When you receive the invitation to join us, just respond in
the affirmative and you'll be 'plugged in' to one of the
most comprehensive electrical/avionics communities on the
'net'.
Could you please, advise where can i find help with backbone elec system
architecture and etc...guys want to fly in couple of months))))
We're pleased to help. Tell us more about the project.
At firsts blush, your architecture requirements may
be exceedingly simple. Stand alone magnetos. Simple
one battery/one alternator configuration not unlike
hundreds of thousands of type certificated aircraft
that have flown successfully for a century. The
greatest difference will be the lack of an 'avionics
bus' and associated master switch. That concept was
hatched with poor understanding of then-brand-new
solid state avionics. The value of the avionics master
was limited from the beginning then and has no
value today.
Based on what we know now, your shared details may
prompt further suggestions. I've posted a 'first
pass on an architecture we're evolving here
on the AeroElectric-List. It shows an endurance
bus (common to single alternator designs), battery
bus and a brown-out booster. You may not need
any of these things we'll help you figure it out.
See: https://tinyurl.com/y6ku7lbh
Thank you again for your great work and support of aviation community!
You're most welcome my friend . . . it's what we do
here.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Sun Jul 26, 2020 12:52 pm Post subject: RV10 primary elec sys wiring |
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At 09:57 AM 7/23/2020, you wrote:
>Recently friend of mine asked me to help with his RV-10 electrical
>and avionics hookup. Most of works are done except all wiring work.
>I spent many hours doing research and stuck...we have perhaps unusual
>config with one regular battery(RG-25XC)with Batteryminder charging
>kit BM-AIK2A, just one primary alternator Plane Power 99-1012 with
>built-in voltage regulator (unfortunately) and small cmart backup
>battery TCW IBBA-12v-6AH. Ignition - Champion slick magnetos (6393 and 6350)
> lefthand one with SS1001 booster.
Alex, there's another simple process that will help
move planning and design for your project forward.
It's called a Load Analysis . . . an activity that
starts early on in the design of a TC aircraft.
It's simply an organized listing of every anticipated
electrical load. For our purposes, I've expanded the
data set to separate out load groups by the bus that
powers the group. I've added space to call out the
proposed size of circuit protection and the wire
size for the feeder.
There are examples of these studies in Excel on
my website at
https://tinyurl.com/9rt6ymn
browse through those and you'll get the idea.
You MIGHT want to do three load-sheets. One for
the main bus, endurance bus and battery bus.
Here's a blank form that helps put the thing
together.
https://tinyurl.com/7jqypwj
If you know some current draws, fill them in
but for now . . . just identify every electrical
demand and hypothesize how you'll get power
to each device.
Use a pencil and keep clean-rub eraser handy.
You may revise this thing several times. Alternatively,
do your own in Excel.
Later on, you'll want to consider filling the
columns as operating requirements for the various
flight conditions are defined.
Once the architecture and energy management
details are known, you'll be 90% of the way
there . . . all the rest is wires, terminals,
crimp tools and string ties.
Bob . . .
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Sun Jul 26, 2020 7:43 pm Post subject: RV10 primary elec sys wiring |
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At 04:06 PM 7/26/2020, you wrote:
| Quote: | Oh, thank you, this will be my main task for now - load analysis and a wise idea on how to power every unit...
started to make the ELA list, then will think how to divide load between buses... |
It gets even better. Your architecture and loads
documents are the foundation for expeditious
generation of a ship's wire book.
As an electron herder on the heavy iron, you'll
already have a reverence for the universal
language of schematics for describing the
ship's electrics.
Take a peek at the documents posted at:
https://tinyurl.com/yytrxofg
https://tinyurl.com/y23kjwu6
These are examples of how your architecture
drawing (road map) and loads analysis (table
of contents) become the first sheets to a
page-per-system wirebook that would make your
project easily understood, repaired or modified
in the future no matter what language was
spoken by the technician.
If you're a CAD driver that will import
.dwg files, 95% of the work on your projects
documents is already done. You can download
the AutoCAD files from my website for importing
appropriate pages into your own work.
Bob . . .
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