Today's Message Index:
----------------------
1. 04:43 AM - Re: Aux Battery Idea Was: Speaking of Aux Batteries (user9253)
2. 10:08 AM - Re: Aux Battery Idea Was: Speaking of Aux Batteries (Robert L. Nuckolls, III)
3. 12:00 PM - Re: Re: Aux Battery Idea Was: Speaking of Aux Batteries (David Saylor)
4. 01:03 PM - Re: Aux Battery Idea Was: Speaking of Aux Batteries (David Saylor)
5. 04:00 PM - Re: Safety For Electrical System Workers Essay (CaptainCaptain)
6. 05:10 PM - Re: Re: Aux Battery Idea Was: Speaking of Aux Batteries (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Aux Battery Idea Was: Speaking of Aux Batteries |
The starter contactor is normally energized by switching the positive wire.
It is dangerous to switch the negative wire. If that wire ever gets shorted
to ground, the starter motor will spin the prop, causing damage or injury.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491247#491247
Message 2
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| Subject: | Re: Aux Battery Idea Was: Speaking of Aux Batteries |
>
>Here's a work in progress.=C2 Obviously not
>complete, no alternator shown, lot's of detail
>omitted, etc, but the starter contactor power is
>shown.=C2 That's the key, unless I'm missing something.
There are no 'timing' issues with using
a second battery for brownout protection.
Consider Z-35 for second battery and
simply leaving the aux battery relay
open until after the engine is running.
Bob . . .
Message 3
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| Subject: | Re: Aux Battery Idea Was: Speaking of Aux Batteries |
Good point, and easy enough. Thanks!
On Mon, Sep 9, 2019 at 4:48 AM user9253 <fransew@gmail.com> wrote:
>
> The starter contactor is normally energized by switching the positive wire.
> It is dangerous to switch the negative wire. If that wire ever gets
> shorted
> to ground, the starter motor will spin the prop, causing damage or injury.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=491247#491247
>
>
Message 4
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| Subject: | Re: Aux Battery Idea Was: Speaking of Aux Batteries |
Thanks Bob,
What is the cost of accidently leaving the aux battery on during start? Is
it just a sag, or does starter-sized current try to run through the small
relay and associated wiring? If the main is weak, will the aux battery
work that much harder? I'm concerned that a relatively simple mistake like
leaving the aux batt on during start will do some damage.
(I've put switches in the wrong position before...)
--Dave
On Mon, Sep 9, 2019 at 10:13 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
>
> Here's a work in progress.=C3=82 Obviously not complete, no alternator s
hown,
> lot's of detail omitted, etc, but the starter contactor power is shown.
=C3=82
> That's the key, unless I'm missing something.
>
>
> There are no 'timing' issues with using
> a second battery for brownout protection.
> Consider Z-35 for second battery and
> simply leaving the aux battery relay
> open until after the engine is running.
>
>
> Bob . . .
>
Message 5
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| Subject: | Re: Safety For Electrical System Workers Essay |
When I saw the theme, I couldn't imagine what students should write about. I would probably solve this problem with ordering this essay on https://www.myassignmentwriting.com.au/ and I know that it is not very cheap but most of the students actually can afford such services I think. Most likely.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491258#491258
Message 6
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| Subject: | Re: Aux Battery Idea Was: Speaking of Aux Batteries |
At 01:58 PM 9/9/2019, you wrote:
>Good point, and easy enough.=C2 Thanks!
Bob . . .
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