Today's Message Index:
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1. 09:09 AM - Re: Total Power Failure? (Dr. Andrew Elliott)
2. 11:41 AM - Re: Total Power Failure? (Robert L. Nuckolls, III)
3. 07:28 PM - Re: Z-12 questions (Rick Beebe)
Message 1
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| Subject: | Re: Total Power Failure? |
At least the designers of the now-defunct Precision Airmotive system
used a commonly available 12V SLA battery that is easy and
inexpensive :) to replace every couple of years, and the system has
checks for back-up battery voltage built in. Got one in the
hangar that I plug into the charger about 1/month.
On the other hand, the AFS 3400 EFIS back-up battery is an unspecified
internal lithium-ion device. I guess you have to open it up
to find out if is an off-the-shelf battery or a custom. At least when
you go on internal, the unit displays a battery capacity
indicator, which can be checked every time you shut the plane down.
Andy
------------------------
Andrew S. Elliott, CFI
Servicios A=E9reos, LLC
Dynamic Propeller Balancing, Flight Instruction
PH: 720-460-1823
Message 2
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| Subject: | Re: Total Power Failure? |
At 11:09 AM 10/17/2018, you wrote:
>At least the designers of the now-defunct Precision Airmotive system
>used a commonly available 12V SLA battery that is easy and
>inexpensive J to replace every couple of years, and the system has
>checks for back-up battery voltage built in. Got one in the hangar
>that I plug into the charger about 1/month.
>
>On the other hand, the AFS 3400 EFIS back-up battery is an
>unspecified internal lithium-ion device. I guess you have to open
>it up to find out if is an off-the-shelf battery or a custom. At
>least when you go on internal, the unit displays a battery capacity
>indicator, which can be checked every time you shut the plane down.
Sounds like thoughtful design . . .
Bob . . .
Message 3
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| Subject: | Re: Z-12 questions |
On 10/14/2018 2:01 PM, Robert L. Nuckolls, III wrote:
> There will be a variant of Z-12 published that takes
> some cues from Z-13/8 where the second alternator is
> drives the battery bus as opposed to the main bus.
>
>> Will the alternators continue to operate as long as they arent
>> both powered down and back up? Is a second, smaller battery
>> required to ensure alternator operation?
>
> The proposed new z-figure will offer all the advantages
> of Z-12 (originally designed for TC aircraft) and
> Z-13 combined.
What's the timeframe on this being published?
--Rick
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