Today's Message Index:
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1. 10:13 AM - Re: Z-13/8 inquiry (bcone1381)
2. 12:29 PM - Re: Z-13/8 inquiry (user9253)
3. 12:53 PM - Re: Re: Z-13/8 inquiry (Ken Ryan)
Message 1
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| Subject: | Re: Z-13/8 inquiry |
[quote="nuckolls.bob(at)aeroelect"]At 05:41 AM 11/15/2017, you wrote:
>
>
> This brings up another design goal for making direct
> connections to batteries. The legacy design conventions
> in type certified aircraft called for always hot feeders to
> be protected at no more than 5A. The idea was to limit
> the battery's ability to start fires in the event of
> a landing that was really hard to walk away from.
>
> Bob . . .
My Load Analysis looks like the electrical system will have less than 10A draw.
5.4A continuous, 10.5A when the Fuel Pump is on. So, simplification, reliability
and weight reduction would demand dual buses with equal loads, and ditching
the Battery Master Relay. Is that unconventional idea a bad idea? What am
i not seeing?
--------
Brooks Cone
Bearhawk Patrol Kit Build
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490421#490421
Message 2
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| Subject: | Re: Z-13/8 inquiry |
The pilot needs a way to quickly shut off all sources of electrical power at the
source.
This is important in case of smoke or fire or an imminent forced landing. A battery
contactor will fulfill that need.
A battery contactor can also be shut off if the starter contactor welds itself
shut.
Each circuit should have its own fuse. If a fuse blows, only one load will quit
working.
Dual buses are more complicated than a single bus
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490423#490423
Message 3
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| Subject: | Re: Z-13/8 inquiry |
A battery contactor allows for easy connection to a battery charger,
whereby the battery charging current is limited to the battery, without
powering the bus/systems. It also allows for easy connection to a ground
power source to power the bus/systems, without subjecting the battery to
the ground power.
On Fri, Jul 19, 2019 at 11:37 AM user9253 <fransew@gmail.com> wrote:
>
> The pilot needs a way to quickly shut off all sources of electrical power
> at the source.
> This is important in case of smoke or fire or an imminent forced landing.
> A battery contactor will fulfill that need.
> A battery contactor can also be shut off if the starter contactor welds
> itself shut.
> Each circuit should have its own fuse. If a fuse blows, only one load
> will quit working.
> Dual buses are more complicated than a single bus
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=490423#490423
>
>
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