Message-Id: <5.1.1.5.2.20040615140426.02498538@localhost>
Date: Tue, 15 Jun 2004 14:09:39 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Mark Steitle <msteitle@mail.utexas.edu>
Subject: Re: [FlyRotary] alternator redundancy
In-Reply-To: <list-163669@logan.com>
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Ken,
Something to consider... a second conventional alternator adds a second fan 
belt.  If one lets go, the second one (hopefully) will survive to continue 
spinning the water pump and alternator.  If you loose both belts at the 
same time, you will have to land asap since your coolant won't be 
circulating.  Also, these little Geo alternators are about half the weight 
of the Mazda unit, so by this rationale there isn't a weight penalty.

Mark S.


  At 06:35 PM 6/15/2004 +0000, you wrote:
>Hi Mike,
>I've been kicking this around for quite some time (I was a motorcycle 
>mechanic while in college).  The idea was to use a motorcycle or 
>snowmobile magneto.  The problem is that there just isn't much room on the 
>between the flywheel and the redrive to mount the magneto components.  I 
>just recently received my 2.85 redrive from Tracy and hope to take another 
>look at this problem this fall.  There is also a possibility of mounting 
>the magneto components on the accesory end of the engine.  More to follow 
>in the coming months; I hope someone beats me to finding a solution.
>
>Ken Powell
>
>
> > Dear All,
> >
> > There was a thread a while back in which one of our colleagues 
> suggested the
> > possibility for a second alternator perhaps mounted on the PSRU??
> >
> > Could be a lighter option for redundancy than two batteries
> >
> > Did this go anywhere?
> >
> > Mike
> >
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html