REFLECTOR: Re: Electric

[Scott Derrick]

Kurt,

Your battery setup sounds like it meets the KISS design principle in 
spades.  I like it.  My gyros are vacume driven, sigh....  Since they 
also drive my autopilot changing to all electric would be mucho $$$, 
though Century just announced they now are selling electric gyros that 
will interface to their autopilots.  Wonder what their price's are?

I will get out my Aeroelectric Connection again and reread that section 
again. 

Heading for the airport in a hour or so, its 12 degrees outside but 
warming up fast. 

Thanks for the help offer, if the usual allotment of airport bums(spare 
muscle) falls off I made take you up on that!

Scott

NMFlyer1 at aol.com wrote:

> Scott,
>  
> I definately need to get up there and take a look. Aren't we a strange 
> lot that enjoys retrofit or plans-departure hell?.. Oh well.. I enjoy 
> it as well.
>  
> I had origonally planned on using a charging splitter and only running 
> one battery at a time. Then I re-read all of the Bob K stuff. Looking 
> at his reasoning (and trusting his experience) I changed plans to a 
> blend of his suggestions and what fits my airplane.
>  
> I am running both batteries in the nose, with seperate contactors and 
> switches for each one.
> The switched side of the contactors are hooked together and supply 
> power to all of my forward systems and essential buss. The 2G wire 
> that runs through the conduit also connects there. Like I said, I can 
> run either or both batteries (or shut them both off if I have to). 
>  
> The 2G comes out the back of the conduit and runs straight to the 
> starter solenoid lug (Chevy type starter). That is where my aft power 
> buss suppply is as well as the attachment for the Alternator. (I do 
> have a fuseable link in that line and a pullable field breaker for 
> safety).
>  
> So, to answer your question, If one battery is off line, it is 
> isolated from everything _including _the charging system. According to 
> Bob K, the only reason you need to shut off a battery is for power 
> conservation should you lose an alternator (after you load shed to 
> critical power items only). Normal mode is both batteries ON.  Since I 
> have 2 voltmeters and an ammeter, I should know immediately if 
> anything goes amiss with the charging/battery systems.
>  
> I consider 2 working batteries and a charging system as part of my MEL 
> since everything in the airplane is electric ( 2-electric fuel pumps, 
> 2 MSD ignitions, and electric gyros).
>  
> If you need a hand moving your project, let me know. My schedule is as 
> hosed as ever, but I do have some open time.
>  
>  
> Kurt
>
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