Ed Anderson wrote:

Well, I measured the oil flow I get through the Ross Gearbox today with the
engine producing 80 psi oil pressure.  At 80 psi, I get 16 oz/1 pint per
minute or 7.5 gallons/hr oil flow out of the drain.  Its a steady stream, so
easy to see how it would blow oil past the seal if the Ross unit is not
adequately drained.

I located a fuel pump that looks idential to the one that Charles Halbert
uses as a scavenger pump that I may install.  However, in researching
seals/oil seals/radial seals, I have found a class that looks very
interesting.  They are apparently designed to seal against a rotating shaft
for fluids up to several hundred psi.  The appear to be an order of
magnitude improvement over the oil seals that are in the Ross unit.  If
indeed my initial impression is correct, it may provide an answer.  See
attachment for a couple of  classes of such oil seals.

Does anyone have a familarity with such seals and could you comment on your
assessment of their suitability for sealing the rear of the Ross PSRU
against oil leaks.

Thanks

Ed
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews NC
eanderson@carolina.rr.com

Ed I was only able to access one of those links you attached.

Paul Lamar
 
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