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
> >
> >
> >
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> >
> >
>
>
> --
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