Had some time and put a light weight rotor(picture) in  my ground test
single rotor.
The engine is starting and running fine. The  smoke, because of the lack of
oil rings,
does not go away until 5000 RPM+  and 22” MAP.
This is certainly not acceptable for aircraft  operation.
Have I overlooked something?

Has it been run anywhere  else?

Richard  Sohn
N2071U

http://www.fairpoint.net/~res12/home.html

I  suppose it was intended for a racing engine that never gets below 7000
or 8000  RPM.
Measure the pressure in the crankcase with a water manometer at  different
MAPs.


Paul Lamar


I had both inner and outer oil scraper "O" rings fail due to an over heat,
one weekend and the oil smoke was spectacular. I don't see that working at
all.

I do start side seals off at zero clearance which might help a bit. But it
didn't help me. Only a rebuild with new "O" rings helped. You might try it
with  just the outer oil scraper in place.

Lynn E. Hanover


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