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Thoughts on a few electrical system configurations?

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nuckolls.bob(at)aeroelect
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Posted: Thu Jan 09, 2014 7:06 am Post subject: Thoughts on a few electrical system configurations?

At 04:37 PM 1/8/2014, you wrote:

 	  Quote: 	
		  



David,



Suggest you also consider 60A primary alt. and 20A secondary alt. 

Set the regulator on the secondary 0.5V lower than primary 

regulator. I have this in my all glass RV10. After 3 years, I had a 

primary alt. failure due to spun bearing shorting out the winding. 

Bus voltage dropped 0.5V as expected; the secondary alt. picked up 

the slack and we completed our flight at our leisure. With 20A I can 

keep everything lit up indefinitely except my heated pitot and 

landing lights. No bus switching or load shedding necessary.


	


    This philosophy is described in Figure Z-12

    which is representative of standby alternator

    installations on what must now be more than a

    thousand TC Bonanzas, Mooneys, Pipers and Cessnas.



   Bob . . .

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