Today's Message Index:
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1. 03:59 PM - RV10 Single Batt + Dual Alternator (supik)
2. 05:33 PM - Re: What's all this 'maintainer' stuff anyhow? (skywagon185guy .)
3. 06:19 PM - Re: RV10 Single Batt + Dual Alternator (user9253)
Message 1
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| Subject: | RV10 Single Batt + Dual Alternator |
I think I am somehow close to the Z101. As the batt in the RV10 is located in the
tailcone -with the ALT-2 connected to the ESS bus I tried to avoid the long
always hot wire between the BATT and ALT-2 B lead.
ESS BUS switch with ALT-2 is normally ON during normal flight. ALT-2 is set at
lower voltage vs. ALT-1
I know I'll get crucified for the 2 AVIONICS BUSES..I plane to move the autopilot
and its servos from the AVIONX ESS bus to the ESS BUS to avoid inductive loads
on the AVIONX ESS bus.
The 50amp CB between the MAIN BUS and ESS BUS is there to protect the diode and
possibly isolate the MAIN BUS if ESS BUS develops a hard fault.
Do you see any other potential NO GO issues with this setup or is it acceptable?
--------
Igor
RV10 in progress
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http://forums.matronics.com/viewtopic.php?p=497053#497053
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Message 2
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| Subject: | Re: What's all this 'maintainer' stuff anyhow? |
Hi Bob,
Thanks for the plot information...Maintainers and their profiles.
Your details brought up a question.
Would you have a suggestion for a simple setup for measuring internal
cell/battery resistance, IR, of lithium based cells.
Modelers use a lot of Lipo based batteries. And there is a strong need to
keep track of their condition and it seems like tracking IR could be the
best option. A practical way to run the tests is sorely needed.
Your suggestions are always appreciated. D
On Mon, Jun 22, 2020 at 4:38 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 10:40 AM 6/20/2020, you wrote:
>
> The Battery Tender Jr. (BTJr) saga continued . . .
>
>
> I finished plotting and annotating some
> Battery Tender Jr. performance compared
> to a laboratory-grade charging profile
> with a bench power supply.
>
> I hope the plots are self explanatory:
>
> https://tinyurl.com/ybzv8t8n
>
> It's interesting that in spite of the fact
> that the BTJr wall-wart does not feature
> an oft recommended 'top-off' feature, the
> energy pumped into our test article battery
> was not substantially different than application
> of the 'lab-grade' recharging profile.
>
> I've got a couple BTJr C-Ms shepherding
> 100AH truck batteries out in the shop. They've
> been on maintenance for over a year. Just
> for grins, I'll go measure the maintenance
> current on them tomorrow.
>
> Bob . . .
>
Message 3
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| Subject: | Re: RV10 Single Batt + Dual Alternator |
The schematic diagram is overly complicated.
The utility bus can be eliminated and those loads can be powered directly from
the Main power bus.
Both avionics buses can be eliminated and those loads can be powered directly from
the Essential bus.
The two alternators will be connected in parallel whenever both contactors are
energized.
Is one of the alternators set at a lower output voltage than the other one?
The two relays are unnecessary failure points.
Eventually some other pilot will fly your plane.
Will that pilot know what to do when some component fails?
--------
Joe Gores
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