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Date: Sat, 12 Mar 2005 09:27:09 -0500
From: Joe <Jewen@Comporium.net>
Subject: Re: [FlyRotary] Re: Smaller Alternator
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Steve,
Where in SC are you?  I am in Lancaster,SC.
Joe

----- Original Message ----- 
From: "Steve Brooks" <prvt_pilot@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, March 12, 2005 8:30 AM
Subject: [FlyRotary] Re: Smaller Alternator


> Paul,
> 
> Very nice.  I'd heard before that t was [possible to
> mount the Geo alternator on the 13B, but I hadn't ever
> obtained one. I also "feel" that the Mazda is more
> reliable, but that is just based on knowing how GM
> cuts corner, especially on low end cars. 
> 
> I'm curious if you weighed the stock alternator, and
> the Geo, to see how much weight difference there is. 
> I'd be prone to change just for the weight loss.  55
> amps would be more than enough.  I've never seen more
> than about 40 amps after start, and that is just for a
> few seconds.  Normal running current seems to be in
> the 13 amp range, with just engine and GPS/Comm.
> 
> I'm in SC right now and planning to do some work on
> the plane today.  I found some interference in the
> aileron control, caused by the elevator tube hitting
> the vacuum line.  I'm going to cut off the 5/8" vacuum
> line where it comes through the bottom of the firewall
> and run 3/8 to the regulator.  It is 3/8 after the
> regulator anyways, but I ran 5/8 from the rear to the
> front and up to the regulator, because of the long
> run.  I don't think that changing out 2' of line from
> 5/8 to 3/8 will hurt me, but it'll gain a 1/4" of
> clearance which will resolve the interference issue.
> 
> Probably won't be able to fly today due to high winds,
> but hopefully will get in a couple of hours tomorrow
> before heading back to NC.
> 
> Steve Brooks
> 
> 
> 
> 
> --- Paul <sqpilot@bellsouth.net> wrote:
> > I purchased and installed a smaller alternator for
> > my rotary powered SQ2000. It is an alternator for a
> > 1995-1997 Geo Metro automobile, and is 55 amps, and
> > smaller than the stock Mazda alternator. 
> > Fortunately, the width of the mounting ears and
> > location of the tang where the alternator adjustment
> > bracket attach are in the same location.  It looks
> > identical to the 1989 Mazda alternator, except for
> > it's reduced size. It is 55 amps. 
> >      It came with a small serpentine grooved pulley,
> > so I removed that and installed the double grooved
> > pulley I got from Rusty. (Thanks, Rusty).
> > Unfortunately, the pulley was concaved on the rear
> > and would rub against the alternator body, so I had
> > to make a small spacer to move the pulley just far
> > enough away from the alternator case so it would not
> > make contact. Fortunately, there were enough threads
> > left to install the pulley. I also had to make a
> > small sleeve to fit over the threads so that the
> > pulley had more contact area inside (so that it
> > would be on the new shoulder instead of against
> > threads). 
> >      The only other change necessary was the
> > alternator mounting thru-bolt. The stock Mazda was
> > 10 mm, and the new alternator required an 8 mm bolt.
> >  I just went to CarQuest and got a 10mm to 8mm valve
> > guide and as you can see in the picture, that was
> > the end of that problem. Hope this is useful
> > information to someone....anyone...???
> >     Paul Conner> >>  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