 |
Matronics Email Lists Web Forum Interface to the Matronics Email Lists
|
View previous topic :: View next topic |
Author |
Message |
longg(at)pjm.com Guest
|
Posted: Mon Nov 30, 2009 9:53 am Post subject: Auxillary Battery Installation... |
|
|
I am going to install the B & C Sealed RG (Recombinant Gas) Battery 12V,
7.2AH job in my aircraft as a backup battery for my dual EI. I've not
used batteries with fast-on tabs before.
What size tabs and what size wire would I expect to run from the battery
to the contactor? I'll be using Z-30 as my guide. Would I then run the
normal #4 to the main battery contactor or could I go with lighter? Run
is 10 feet from behind my seat.
B & C does not sell a case for these things. Has anyone found suitable
cases or just made them? I expect to mount the contactor on the case.
Thanks,
Glenn
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
messydeer
Joined: 13 Feb 2006 Posts: 214 Location: Bellingham, WA
|
Posted: Mon Nov 30, 2009 5:20 pm Post subject: Re: Auxillary Battery Installation... |
|
|
Did you see the link to "outline drawing" on the page that describes this battery?
http://www.bandc.biz/pdfs/bc102-1.pdf
It says they are 3/16" male fastons on this battery.
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________ Dan |
|
Back to top |
|
 |
nuckolls.bob(at)aeroelect Guest
|
Posted: Mon Nov 30, 2009 5:36 pm Post subject: Auxillary Battery Installation... |
|
|
At 11:45 AM 11/30/2009, you wrote:
Quote: |
I am going to install the B & C Sealed RG (Recombinant Gas) Battery 12V,
7.2AH job in my aircraft as a backup battery for my dual EI. I've not
used batteries with fast-on tabs before.
What size tabs and what size wire would I expect to run from the battery
to the contactor? I'll be using Z-30 as my guide. Would I then run the
normal #4 to the main battery contactor or could I go with lighter? Run
is 10 feet from behind my seat.
|
Z-30 is suggested for batteries capable of assisting
with getting the engine started. The 7.2 a.h. battery
can't help with cranking.
Z-35 shows lighter wiring and hardware for small aux
batteries.
Quote: | B & C does not sell a case for these things. Has anyone found suitable
cases or just made them? I expect to mount the contactor on the case.
|
AGM batteries don't need a battery box. They're
spill-proof. Containing escaping liquid and venting
copious out-gassing is the only reason we put boxes
around batteries in the first place. AGM/RG batteries
can strap down in a simple tray. You don't need a
contactor, just a 30A plastic relay as described in
Z-30. What is the 10-foot run about? Your aux battery
should be right next to the main battery as should the
aux battery fuse block. Wires from the fuse block can
be any necessary length.
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. )
---------------------------------------
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
longg(at)pjm.com Guest
|
Posted: Mon Nov 30, 2009 7:56 pm Post subject: Auxillary Battery Installation... |
|
|
Thanks Bob and Dan,
My 10 foot deal was to move the battery behind the seat as I am short of
room on the firewall where the primary battery is. If necessary I may be
able to strap this thing inside the firewall behind the panel to keep
the wires short.
The B & C Notes indicated a 3.0 Amp charging limit? Is that an issue
with the charge coming off the alternator?
Glenn
--
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
nuckolls.bob(at)aeroelect Guest
|
Posted: Tue Dec 01, 2009 6:43 am Post subject: Auxillary Battery Installation... |
|
|
At 09:53 PM 11/30/2009, you wrote:
Quote: |
Thanks Bob and Dan,
My 10 foot deal was to move the battery behind the seat as I am short of
room on the firewall where the primary battery is. If necessary I may be
able to strap this thing inside the firewall behind the panel to keep
the wires short.
|
Hmmmm . . . it would be best to keep the wires
short. What combination of equipment and design
goals are driving the need for an extra battery?
Quote: | The B & C Notes indicated a 3.0 Amp charging limit? Is that an issue
with the charge coming off the alternator?
|
ALL manufacturers of small batteries would
HOPE that their product never gets charged
above some fairly benign value. Bottom line
is that when installed in most vehicles, there's
no way to practically observe those limits.
As long as the battery is seldom or never asked
to do its job and becomes seriously depleted,
then it will not be subjected to high recharge
rates as a routine matter.
However, hanging little batteries off a robust
bus does raise questions about flight-worthiness.
This battery should be tested for capacity at
every annual.
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. )
---------------------------------------
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
longg(at)pjm.com Guest
|
Posted: Tue Dec 01, 2009 8:46 am Post subject: Auxillary Battery Installation... |
|
|
Thanks Bob,
Yeah, nothing is easy. My goal for the backup battery is to ensure
reliability of my electrically dependent ignition should a major event
occur in the primary charging/battery system. Note, I have an SD8 for a
backup alt which feeds the essential bus.
So, the design goal is that when all else fails, the backup battery
would run one side of the ignition and provide time for me down safely.
I suppose one option would be to isolate the battery from the charging
system, but that would require constant monitoring on my part.
Glenn
--
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
nuckolls.bob(at)aeroelect Guest
|
Posted: Tue Dec 01, 2009 11:19 am Post subject: Auxillary Battery Installation... |
|
|
At 10:38 AM 12/1/2009, you wrote:
Quote: |
Thanks Bob,
Yeah, nothing is easy. My goal for the backup battery is to ensure
reliability of my electrically dependent ignition should a major event
occur in the primary charging/battery system. Note, I have an SD8 for a
backup alt which feeds the essential bus.
|
Okay, how many electrical feeds are necessary to keep
the engine running and what devices do they service?
Quote: | So, the design goal is that when all else fails,
|
I'll suggest we strive to eliminate "when all else fails"
from the lexicon of airplanespeak. It's a vague, broad brush
admission that we're unsure as to the SYSTEM reliability
of our design. The feel-good response is to stack on
"safety enhancements" that tend to prop up an ill-defined
or mis-understood system.
"All else" says you've suffered MULTIPLE failures of items
necessary for continued flight . . . or perhaps ONE failure
for which no plan-b was crafted.
If you have an SD-8 + main alternator and an RG battery,
perhaps you already have enough stuff to keep the grim-
salvager from getting a call to come clean up the
aluminum mess you made.
Give us a list the electro-whizzies that keep the
engine going along with their current requirements
and we'll go from there.
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. )
---------------------------------------
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
longg(at)pjm.com Guest
|
Posted: Tue Dec 01, 2009 6:41 pm Post subject: Auxillary Battery Installation... |
|
|
Bob,
Quote: | Okay, how many electrical feeds are necessary to keep
the engine running and what devices do they service?
|
Quick answer: 1. Life is pretty simple. I've got 2 Dynons both with
independent AHRS and internal battery so I'm pretty much covered for
attitude, airspeed etc. Radio and gps backup are handheld.
The big nickel is keeping one of two of the Lightspeed Ignition boxes
alive. Each box requires a min of 5 volts before they drop off the
planet. By design it is suggested that one connect to the main bus and
one to the aux bus. When things go south it is recommended to take one
off line to save remaining power.
With the exception of maybe an interior light, I could probably fly it
in just so even in the dark which is when I fly the most. I'm installing
a night vision camera which is < 3 amps and optional on a clear night.
No need for a landing light in most cases.
Right now I have each on an independent circuit (30 amp in line fuse
holders) followed by two potter 5 amp CB panel switches. Source for both
is directly off the battery side of the main battery contactor. Klaus
might prefer I bolt that line directly to the battery, but I have not
done that yet.
Thanks,
Glenn
--
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
longg(at)pjm.com Guest
|
Posted: Thu Dec 03, 2009 7:07 am Post subject: Auxillary Battery Installation... |
|
|
Bob,
I wanted to bubble this question up once more to get your comment on my
options to proceed. Thanks!
Glenn E. Long
--
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
nuckolls.bob(at)aeroelect Guest
|
Posted: Thu Dec 03, 2009 8:03 am Post subject: Auxillary Battery Installation... |
|
|
At 08:38 PM 12/1/2009, you wrote:
Quote: |
Bob,
>Okay, how many electrical feeds are necessary to keep
>the engine running and what devices do they service?
Quick answer: 1. Life is pretty simple. I've got 2 Dynons both with
independent AHRS and internal battery so I'm pretty much covered for
attitude, airspeed etc. Radio and gps backup are handheld.
The big nickel is keeping one of two of the Lightspeed Ignition boxes
alive. Each box requires a min of 5 volts before they drop off the
planet. By design it is suggested that one connect to the main bus and
one to the aux bus. When things go south it is recommended to take one
off line to save remaining power.
|
Z-13/8 with a rationally maintained RG battery will
always have a source of energy needed to keep one
if not both ignition systems running.
If it were my airplane, #1 ignition would drive from
a fuse on the main bus. #2 would run from a fuse on the
battery bus. No extra batteries. No breakers. Only the
normal ON/OFF control switches.
Configure your e-bus as
Quote: | With the exception of maybe an interior light, I could probably fly it
in just so even in the dark which is when I fly the most. I'm installing
a night vision camera which is < 3 amps and optional on a clear night.
No need for a landing light in most cases.
Right now I have each on an independent circuit (30 amp in line fuse
holders) followed by two potter 5 amp CB panel switches. Source for both
is directly off the battery side of the main battery contactor. Klaus
might prefer I bolt that line directly to the battery, but I have not
done that yet.
|
There are multiple recipes for success that use common
ingredients. Be cautious of mixing-matching the ingredients
between recipes. Z-13/8 will service your needs SIMPLY and
nicely with no single points of failure for keeping the engine
running.
Configure the e-bus with attention to design goals
described in chapter 17.
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
longg(at)pjm.com Guest
|
Posted: Thu Dec 03, 2009 8:33 am Post subject: Auxillary Battery Installation... |
|
|
Great,
Thanks Bob. Glenn
--
| - The Matronics AeroElectric-List Email Forum - | | 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
 |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|