Paul,

      I have followed your informative website for years, and have
learned quite

a lot concerning rotary engines. I design and build sport hovercraft as
a hobby,

and rotary engines have always seemed like a good choice to me. At this
time

my interest is in the PSRU's that use auto transmission planetary gear
sets. My

current project uses twin thrust fans driven by the same engine. For a
variety

of reasons, I would like the fans to rotate in opposite directions. My
engine

centerline is much lower than my fan centerlines, so my reduction is
done with

a belt drive. I would like to use a planetary gear set at one of the
fans to

reverse its direction relative to the single belt drive that turns both
fans. I can

compensate for the reduction of the gear set with a different input
pulley.

     I can have a housing machined based on the examples on your
website. I

have no clue about lubrication requirements, however. I 'll only be
running 70

horsepower through the unit (and my top output RPM will be 2900), so I
was

hoping to get by without needing a circulating lubrication system. Can
you advise

me as to the amount of ATF that should be present in the housing?
Specifically,

what would be the correct level at the ring gear, and what volume would
be

sufficient?

      Thanks for your time, Paul. I appreciate any input you can give
me.


Regards,

Randy Bland


That is a good question and I think you will need to experiment.
You might need a small electric pump to circulate the oil throuh
a cooler.

Paul Lamar