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From: <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: re-drive question for Tracy
Date: Thu, 16 Jun 2005 22:53:09 -0400
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Hi George, I have line on a very small and light 12V/24V gear pump made of Delrin. I'll send you the numbers and see if it will work for you.
Buly

> 
> From: "George Lendich" <lendich@optusnet.com.au>
> Date: 2005/06/16 Thu PM 06:08:51 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: re-drive question for Tracy
> 
> Bob & Burly,
> 
> I'm developing my own PSRU for the Aussie market and see some advantages in
> not using the engine oil. This is mainly because of the contaminates in
> engine oil, heat, fuel, carbon etc.
> 
> MY bearings are not the same as Tracy's so I don't need pressure feed (plain
> bearings do need pressure feed).
> 
> Although I haven't researched what oil I will use ( just another job) I
> would suggest a high quality gear oil rather than engine oil.
> certainly ATF is designed for clutches etc and doesn't have friction
> modifiers etc.
> 
> I will try a bath lubrication first and if this is not sufficient I will try
> spray feed - some extra complexity, is an understood!
> 
> If there's any suggestions I'm all ears!
> George ( down under)
> 
> 
> > Hi Buly,
> >
> > I have a sort of unique situation that wouldn't apply to most anyone
> > else.  My MM plate (NOT the one supplied by Tracy) has a slight
> > problem.  The recess for the rear seal was machined a few thousands too
> > large.  The seal was not a press fit so I agonized over what I was
> > going to do with it (last year sometime) and finally decided to hold
> > the seal in place with Proseal.  I don't think there is a lot of
> > pressure there, and I don't think it would leak too fast if it did come
> > loose, but I won't know until it happens.  I might be surprised.   If it
> > were to leak, I would prefer to not be pumping engine oil overboard
> > risking the engine as well as the redrive.
> >
> > As a side benefit, I suspect the redrive would run cooler if I weren't
> > pushing hot engine oil thru it.  That should be better for the
> > redrive.  If I were to do it, there would be an oil reservoir, pump, and
> > small oil cooler.
> >
> > I might mention that I will have at least 15 hours of ground time on
> > the engine before even thinking of flying it.
> >
> > Bob W.
> >
> >
> >
> >
> > > > Buly,  do you have a pump that would be suitable for that application?
> > > >
> > > > Bob W.
> > > >
> > >
> > > But of course Bob. I have it, just don't understand why are you
> complicating
> > > your life? Trying to solve a problem that does not exist? :)
> > > Buly
> > >
> > >
> > >
> > > >>  Homepage:  http://www.flyrotary.com/
> > > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
> > >
> > >
> >
> >
> > --
> > http://www.bob-white.com
> > N93BD - Rotary Powered BD-4 (real soon)
> > Prewired EC2 Cables - http://www.roblin-photo.com/cable/
> >
> > >>  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
>