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