Message-Id: <5.1.1.5.2.20040617110627.028c3928@localhost>
Date: Thu, 17 Jun 2004 11:07:42 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Mark Steitle <msteitle@mail.utexas.edu>
Subject: Re: [FlyRotary] Re: second belt on alternator
In-Reply-To: <list-166277@logan.com>
Mime-Version: 1.0
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Bill,
I'll take a picture of my alternator/water pump setup tonight and send to 
you tomorrow.  If there is any interest, I could send it to the Fly Rotary 
group also.

Mark S.


At 08:46 AM 6/17/2004 -0700, you wrote:
>I would very much like to see a picture.
>
>My engine has an e-shaft drive pulley with room for two V-belts, as does 
>my 13-B water pump. My cowl will not allow installation of alternator on 
>top of engine, so it has to be on the plug side.  I could run two belts 
>(identical) from water pump and alternator (need 2-groove alternator 
>pulley), but if one were to break, and cause the other to break, I would 
>lose all cooling (water pump).
>
>I considered a second alternator, so one belt drives each alternator, 
>located in different locations, with the thought (hope) that loss of one 
>belt would be less likely to lose the other. Most planes flying 60 amp 
>alternators or less have only one belt.
>
>A second thought was if I cannot fit in a second alternator, is to have 
>the second belt just drive the water pump, with an idler pulley, then if 
>alternator belt departs, the pump still works, and I can start looking for 
>a place to land using battery power.
>
>With all electric ignition, and fuel pumps, and EFIS, I need to address 
>redundancy.
>Bill Schertz
>KIS Cruiser # 4045
>----- Original Message -----
>From: Mark Steitle
>Sent: 6/17/2004 5:55:27 AM
>To: flyrotary@lancaironline.net
>Subject: [FlyRotary] Re: second belt on alternator
>
> > Bill,
> > My 20B came setup for multiple belts.  It has the multi-v type pulleys.  I
> > recently discovered that the 20B w/p pulley won't fit over a 13B w/p. I
> > could take a picture of my dual alternator setup, if that would help.
> >
> > Mark S.
> >
> >   At 06:25 AM 6/16/2004 -0500, you wrote:
> > >I have been looking at how a redundant belt that would continue to 
> drive the
> > >water pump could be installed, but have not found a viable routing.
> > >Bill Schertz
> > >KIS Cruiser # 4045
> > >----- Original Message -----
> > >From: "Wynn, Mike" <mike.wynn@spectra-physics.com>
> > >To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > >Sent: Wednesday, June 16, 2004 12:43 AM
> > >Subject: [FlyRotary] flyrotary Web Archive
> > >
> > >
> > > > I hadn't thought of the advantages of a second independent belt to 
> act as
> > >a
> > > > back up for the water pump.  Was actually thinking of an 
> thermostatically
> > > > switched EWP as backup and trying to do something at the other end 
> of the
> > > > motor.  Any option to use the flywheel teeth to drive something or 
> is that
> > >a
> > > > silly one?
> > > > Cheers
> > > > 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
> >
> >
> > >>  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