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Date: Sat, 22 Jan 2005 14:50:38 -0600
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: alternator problem fixed
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<... Could you install a diode in the line so that no energy from the 
battery could be be used by the alternator, along with a fuse? ...>
That would defeat the purpose of the fuse.  If battery current can't 
flow toward the shorted B+ or grounded alt field winding such as Paul 
had, what is your power source for blowing the fuse?  A diode would 
result in say a grounded B+ to result in the alternator thrashing its 
brains out pumping all the current it was capable of straight to 
ground.  Fuse exceeds alt output so it wouldn't blow, and you'd be on 
battery power while the alt tries valiantly, but in vain, to blow the 
fuse by itself.
What would be the benefit from that? ... Jim S.

Lehanover@aol.com wrote:

>In a message dated 1/22/2005 10:26:22 AM Central Standard Time, 
>daveleonard@cox.net writes:
>
><< And *that's* why you fuse the alt wire (at the battery end). A short in
> > the alt will draw the full amps available from the battery & turn the
> > wire into a fuse if you don't.
> >
> > Charlie
> >
> >
> 
> Actually, I am hoping that is what will happen.  I have an 18G fusible link
> going to my alternator.  Just a piece of 18G wire with fireproof insulation
> around it.
> 
> Dave Leonard
> 
>  >>
>
>
>Could you install a diode in the line so that  no energy from the battery 
>could be be used by the alternator, along with a fuse?
>
>
>Lynn E. Hanover 
>
>  
>
>>> Homepage:  http://www.flyrotary.com/
>>> Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>>      
>>>
>
>
>  
>