----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Wed 10/17/18: 3
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Today's Message Index:
----------------------
 
     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  _____________________________________


Time: 09:09:59 AM PST US
From: "Dr. Andrew Elliott" <a.s.elliott@cox.net>
Subject: Re: AeroElectric-List: 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  _____________________________________


Time: 11:41:48 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: Re: AeroElectric-List: 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  _____________________________________


Time: 07:28:19 PM PST US
Subject: Re: AeroElectric-List: Z-12 questions
From: Rick Beebe <rick@beebe.org>

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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